316 



more than ca. 110^. The hook is short and the inrolled end un- 

 branched, but often with a few rounded knobs (Fig. 67. 10-13). The 

 spicules in the tentacles (Fig. 67. 14) are slightly curved, with en- 

 larged ends. They measure ca. 110 n in length. 



T. australianus is an easily recognized species, distinctly different 

 from the other species of the genus, in the arrangement of the 

 sigmoid bodies, and in the shape of the calcareous deposits. The shape 

 of the ciliated funnels is seemingly rather characteristic, and in any 

 case distinctly different from that of the funnels in T. keiensis. 



Tceniogyrus cidavidis Ohshima. 



Tœniogyrus cidaridis. Ohshima. 1914. The Synaptidae of Japan, p. 477. 

 „ „ Ohshima. 1915. Holothurians from the North 



West Pacific, pag. 286. 

 „ „ Clark. 1928. The Echinoderms of the Torres 



Strait, pag. 166. 

 Misaki. 19. IV. 1914. 80—100 fms. 1 specimen. 

 Okinose. Sagami Bay. 23. VI. 1914. 100 fms. 1 specimen. 



l.VII.;i914. 200 fms. 2 specimens. 

 Sagami Bay. 2. VII. 1914. 400 fms. 1 specimen. 



All the five specimens at hand are attached to spines of Cidarids 

 by their coiled posterior end. Their colour is in alcohol pale yellow, 

 with large white wheel-papillae. The wheel-papillae are quite want- 

 ing on the posterior end of the ventral side (i. e. that part of the 

 specimen which is turned against the Cidarid-spine) but exceedingly 

 abundant on the dorsal side. There are ten very contracted ten- 

 tacles, with but few digits. The calcareous ring is rather stout. 

 It consists of ten pieces, the radiais being different from the inter- 

 radials. The radiais (Fig. 68. 8) have a distinct slit in the exterior 

 side, and all the calcareous pieces have distinct muscular impress- 

 ions. There is one polian vesicle and a single stone-canal. The 

 madreporite (Fig. 68. 3) has a very characteristic shape, being a 

 square, bent ring. On account of the contraction of the body, the 

 shape of the alimentary canal cannot be made out. On the body- 

 wall there are some few ciliated funnels (Fig. 63. 2). The gonads 

 are branched and the sexes seem to be separate. 



The wheels are of the usual size and shape, and only a few 

 abnormal ones (Fig. 68. 1) are found. The sigmoid bodies are 

 nearly totally confined to the wheel-less part of the ventral side, 



