ASCIDIANS COLLECTED BY MESSRS. RENZI WADA AND SEIZI WADA FROM THE PEARL-OYSTER BED IN THE ARAFURA SEA IN 1940

The present material consists of 27 species collected by Mr. RENZI WADA of the former Nan'yo Pearl Company and Mr. SEIZI WADA, an associate of the former Palao Tropical Biological Station, from the pearl-oyster bed off Melville in the Arafura Sea during the period from September to November of 1940. I express here my hearty thanks to Messrs. R. W ADA and S. W ADA for their kindness in offerring me the present precious material. I am also very grateful to Prof. T. KOMAI for his kind guidance and incessant encouragement. The present work is a part of the study progressed by the financial aid from the Ministry of Education

CONTRIBUTIONS TO JAPANESE ASCIDIAN FAUNA -IX.RE-DESCRIPTIONS OF OKA'S SPECIES FOUND IN "FIGURARO DE JAPANAJ BESTOJ"-

A. OKA (1927) gave brief descriptions of a number of ascidian species in "Figuraro de Japanaj Bestoj" under new names, each with an explanatory note "(仮)" at the end. This note indicates that the name is given provisionally without full description nor sufficient consideration on the identification. Some of these species were redescribed or some names were replaced with known ones by 0KA himself, but eight species remain still untouched in the revised edition of the "Illustrated Encyclopedia of the Fauna of Japan" (1947); they are each marked with (MS) at the end of the name. I had chances to re-examine some type specimens or specimens identified by OKA himself and by this date I could give redescriptions of three species and found out that two are synonyms of the species already known to us. Here, the last three provisional species are redescribed each on the type specimen kept in the Zoological Institute of the Tokyo University of Education

Taxonomic Studies of Appendicularians Collected by the Japanese Antarctic Research Expedition 1957

A small material of appendicularians collected in the Antarctic Seas was examined morphologically and taxonomically. Full descriptions are given for Antarctic or Subantarctic species so far described rather insufficiently, besides morphological and taxonomical notes on some others. Especially a taxonomical discussion is made on the oikopleurid-group involving O. gaussica, O. valdiviae, O. drygalski and O. weddelli, leading to a possible conclusion that these might belong to the single species, O. gaussica

CONTRIBUTIONS TO THE JAPANESE ASCIDIAN FAUNA XXX. -FURTHER NOTES ON JAPANESE CLAVELINIDS-

Three more materials of Japanese clavelinids came into our hand after the Japanese clavelinids known so far had been reviewed (Nishikawa and Tokioka, 1976), two colonies collected from Sagami Bay and preserved at the Biological Laboratory of the Imperial Household, a single colony collected by Mr. Y. Yanagisawa from the Bonin Islands and a single colony collected by Prof. T. Kikuchi from the Ariake Sea, Kyusyu Island. The first included two species, Clavelina elegans (Oka) and a new species, the last was identified with C. elegans, while the second seemed to belong to C. molluccensis (Sluiter) that had not yet been recorded from the Japanese waters. As the range of morphological variations in C. elegans is known but still very insufficiently, it is considered significant to record some features of these two more colonies again in the present paper. In addition to this, a brief description is given as to C. molluccensis to confirm the identification and a full description is made on the new species of Clavelina, to which the name of viola is proposed by us for its characteristic colouration when alive. Before going further, we wish to express our gratitude for the privilege of examining the specimens of the Biological Laboratory of the Imperial Household and also our hearty thanks to Prof. T. Kikuchi of the Amakusa Marine Biological Laboratory of Kyusyu University and to Mr. Y. Yanagisawa, a graduate student at our laboratory, for their generosity in offering those interesting specimens to our examination