315 



by the number of the tentacles and the polian vesicles, by the 

 shape of the calcareous ring, the gonads and the ciliated funnels. 

 Judging from the contorted shape of the specimens and the arrange- 

 ment of the sigmoid bodies, there is reason for supposing that this 

 species like cidaridis and clavus is living commensally with Cidarids, 

 but as to that nothing is remarked on the label. 



Taeniogyrus australianus (Stimpson). 



Chiridota australiana. Stimpson. 1856. Description of some new 



marine Invertebrata. pag. 386. 

 Tœniogyrus australianus. Clark. 1908. The Apod. Holothurians. p. 122. 

 „ „ Clark. 1921. The Torres Strait Echinoderms. 



pag. 166. 



Port Jackson, Shark Island. 7. IX. 1911. Australian Museum. 1 specimen. 

 „ 8. X. 1914. 3 — 5 fms. Sand, gravel. 9 specimens. 



„ 9. X. 1914. 2 — 3 fms. Sand, mud. 4 specimens. 



„ 4. III. 1915. 2 fms. Sand. 4 specimens. 



The specimens at hand measure up to 6 cm in length. Their 

 colour is in spirit pale yellow, tinged with red. They have ten 

 tentacles, each with 5 pairs of digits. The calcareous ring consists 

 of ten pieces, the radiais being distinctly different from the inter- 

 radials (Fig. 67. 9). The interradiais are somewhat varying in shape, 

 but there is no distinct difference between the ventral and the 

 dorsal pieces. The calcareous ring is interesting in having, in all 

 the specimens examined, a faint cartilaginous margin. As the cal- 

 careous ring is rather stout and has a well marked posterior margin, 

 the cartilaginous ring cannot be part of it, but must be regarded 

 as a real cartilaginous ring, though distinctly different from that 

 found in the Synaptinae. There is one polian vesicle and a single 

 stone-canal. The madreporite (Fig. 67. 15) is irregularly ring-shaped. 

 The alimentary canal is not well preserved, but as far as seen it 

 has a loop. The ciliated funnels (Fig. 67. 16) are found only on the 

 body-wall. They are rather difficult to examine, but as far as can be 

 seen, they are of varying size and shape and not united into clusters. 



The wheels are gathered into rather large papillae. They are of 

 the common shape and measure from 70 — 100 fi in diameter. The 

 sigmoid bodies are always confined to small papillae, and usually 

 arranged into groups, but in some of the specimens there are very 

 few (1 — 2) in each papilla. They are rather small, not measuring 



