Pearse, A. S. (Arthur Sperry), 1877-1956.

Winternitz, Jane K.

American Museum of Natural History Scientific Publications

AMERICAN MUSEUM NOVITATESPublished byNumber 888 THE AMERICAN MUSEUM OF NATURAL HISTORY October 15, 1936New York CityNEW SPECIES OF POLYCHAETOUS ANNELIDS COLLECTEDAT APPALACHICOLA, FLORIDA, BY DR. A. S. PEARSE, IN 1935BY JANE K. WINTERNITZ1SyllidaeAUTOLYTUS GRUBEAutolytus brevicirrata, new speciesBody length about 2.5 mm.; width 0.5 mm. at anterior region, tapering to about0.2 mm. at posterior end. Prostomium 0.5 mm. wide and 0.3 mm. long, rectangularin outline and lobed at the anterior margin. There are three pairs of eyes, the largestbeing situated between the most lateral and anterior pair, which are the smallest,and the fairly small more median pair. The prostomium probably bears threetentacles but only one is present in this specimen (figure 1). This tentacle is aboutsix times as long as the prostomium. There are two pairs of lateral cirri, one pairquite short and the other nearly as long as the tentacle. The proventriculus bearsno teeth and lies in somites six to ten. The dorsal cirrus of the parapodium is shortcompared to the tentacular cirrus, and it is about equal to one half the body width.The setae are all compound with a short beak-shaped terminal piece (figure 2).This specimen bears several sexual individuals in a chain. Each of these is abolut 1.2mm. long and 0.4 mm. wide in the middle region, tapering slightly toward both ends.The body is full of eggs. The prostomium bears four short tentacles and two pairs ofeyes, the large pair being most anterior.LoCALITY.-Appalachicola, Florida. The type is in The AmericanMuseum of Natural History (Cat. No. 2271).PhyllodocidaePHYLLODOCE SAVIGNYPhyllodoce unicirrata, new speciesBody length 72 mm.; width 1 mm. at anterior end and 1.5 mm. in midregion,tapering to a point posteriorly. Prostomium length and width both less than 0.25mm. Prostomium rounded and indented at the posterior margin (figure 3). Itbears two pairs of tentacles which are about as long as the width of the prostomium,and one pair of large eyes at the posterior lateral margins. There are four pairs oflateral cirri which are not quite twice as long as the width of the prostomium. Theparapodia and gills are of uniform structure throughout the body. The proportion ofsize of the gill to that of the somite is constant, the gills and somites both being smallerat the posterior end. The gills are in the form of low cones, their broad bases attachedto the notopodium for their entire length. The notopodium is lobed at the outermargin and the ventral cirrus is much reduced (figure 4). The setae are all alike,'Vassar College.2 AMERICAN MUSEUM NOVITATES [No. 88826~~~~~~~~~A,'AA11 10 9 12 7Figs. 1 and 2. Autolytus brevicirrata, new species. Fig. 1, prostomium, X30.Fig. 2, seta, X260.Figs. 3 to 5. Phyllodoce unicirrata, new species. Fig. 3, prostomium, X 30.Fig. 4, parapodium from anterior body region, X 30. Fig. 5, seta, X 120.Figs. 6 to 12. Eupholoe globosa, new species. Fig. 6, prostomium, X 12. Fig.7, elytron from 15th somite, X approx. 14. Fig. 8, parapodium from 15th somite,X 25. Figs. 9 to 12, setae, X 120.NEW ANNELIDS FROM FLORIDAeach abruptly enlarged at the apex and continued into a long, narrow spine. Nearthe base of this spine are a few short, sharp spikes carried on the end of the broad-ened portion (figure 5). There is a pair of long anal cirri.LoCALITY.-Appalachicola, Florida. The type is in The AmericanMuseum of Natural History (Cat. No. 2269).PolynoidaeEUPHOLOE MChrrOSHEupholoe globosa, new species:Body length 50 mm.; width 3 mm. at anterior end, 2.mm. at posterior end. Thetail region tapers gradually to a point. Prostomium (figure 6), length 0.5 mm., width0.7 mm. Width greatest near the anterior end. There are two- pairs of eyes, equalin size, one pair at the anterior prostomial edge and one pair at the base of the mediantentacle. Median tentacle 1.2 mm. long, bearing two lateral-flaps just above where itarises from the prostomium. Cirrophore of median tentacle about one-third thelength of the prostomium; cirrus nearly twice the length of the prostomium. Palpstwice as long as the median tentacle; colorless. The first parapodia extend forwardclose to the sides of the head and beyond the head a length equal to the length of theprostomium. The dorsal cirri of first parapodia are prominent and a little longerthan the median tentacle. Dorsal surface of body completely covered with elytrawhich alternate irregularly with dorsal cirri. Elytra distinctly kidney-shaped an-teriorly (figure 7) becoming slightly wider toward the posterior end. Each bears aciliated cirrus situated just posterior to the region of attachment, besides about 15other cirri and several patches of spines. On the parapodium (figure 8) the noto-podium is rather blunt-edged, but bears a small lobe near the, ventral surface. Theneuropodium is also blunt but bears several small papilla-like lobes. The ventralcirrus is of medium length, acute, slender and points directly ventrally. Dorsalcirrus large and curled, and ciliated on the inner side. Dorsal-most notopodial setaelong and slender and toothed on both margins. Others are shorter but have thesame structure. Ventral-most on the notopodium are a few much shorter, stoutersetae which are acutely pointed, and have a double row of toothed plates which be-come smaller toward the apex (figure 9). Setae of the neuropodia all heavy, com-pound and the same length as those on the ventral edge of the notopodium. Thedorsal-most are heaviest, the basal joint expanding toward the apex (figure 10).The terminal joint has a slender apical and suib-apical tooth. Ventral to these somehave shorter terminal joints (figuire 11), beside some with long slender terminal jointsand very fine apical and sub-apical teeth (figure 12).LoCALITY.-Appalachicola, Florida. The type is in The AmericanMuseum of Natural History (Cat. No. 2270).1936] 3

New annelids from Florida

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American Museum of Natural History Scientific Publications