BEAUFORT, L. F. DE

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ON A NEW SPECIES OF CHILOMYCTERUS FROM NEW GUINEA.ByL. F. DE BEAUFORT(Zoological Museum, Amsterdam).Dr. HARDEl\'BERG kindly sent me for identification a species of Chilomycterus,collected by him in December 1937 at Merauke, South New Guinea. The specimenturned out to belong to an undescribed species, which I have the pleasure tocall after its discoverer:Chilomycterus hardenbergi n. sp.D.LlO. A.LlO. P.Ll7.1. C.9.All measurements given below are in millimeters. Length without caudal128; height 43; head 51, height of head 38, breadth of head at giHopening 46.Eye without free orbital margin, 12, situated in the middle of the length of thehead and 6 above the horizontal through corner of mouth. Interorbital 34. Spinesshort but strong, compressed, each with three very strong, long, flat ridgedroots. A small spine in front and somewhat above each nostrill, which is bestdescribed as a round, open tube with a round perforation anteriorly at its base.Two supraorbital spines on each side; the inner roots of the anterior pair almosttouch each other in the median ,line. Snout, forehead, and interorbital spacesmooth, without median spines. Only six spines in a longitudinal median seriesbetween head and origin of dorsal. Seven spines ·in the longitudinal row to theright and the left of the median one, the last of these spines connected witheach other through their inner roots, immedialtely behind the dorsal. Two spinesto the right and the left of the end of the anal are connected through their innerroots behind the anal dn the same way as those at the end of the dorsal, thelower roots of which are connected with the upper roots of the former, forminga bony ring round the anterior part of the caudal peduncle, which is otherwisesmooth. Back and beHycompletely covered by spines, those of the back withlonger and broader roots than the others. The body is surrounded by 17 spinesbehind the head and with 9&pines in front of the dorsal and the anal. Dorsal,anal, and caudal rounded, narrow at their bases and expanding distally. Lengthof base of dorsal and anal 10, of caudal 7. Longest dorsal ray 27, longest analray 25, longest caudal ray 44. Length of caudal peduncle 16, its height anteriorly20. Pectorals in the form of a trapesium ; the length of their base 14, of thehindborder 40, of the outer rays 25. Colour of the preserved specimen crimson,•3334 TRJDUBIA DEEL 17, 1939, AFL. 1.lighter below. The spines of the back dark towards their end. Fins reddish,dorsal, anal, and caudal dusky at tip. Length of the specimen described 172.This species is allied to Ch. affinis GHTR. As in this, species forehead andthe interorbital space are without spines, but it differs in having less rays inthe fins and in having only six spines-in a longitudinal series along the medianline of the back. Besides the coloration is different.

A NEW SPECIES OF CHILOMYCTERUS FROM NEW GUINEA.

https://e-journal.biologi.lipi.go.id/index.php/treubia/article/download/2548/2190

A NEW SPECIES OF CHILOMYCTERUS FROM NEW GUINEA.

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