VietorHni HulollniroiJn,. 9 



It is pL'rhiips wiirtli iiotiiiir that (tllfi/i / freiUK'iiliv ixtssi'ssrs whct'ls 

 luiviii<|- iimrr than six s))(ilN.fs. A ti<riiri- of <>iil' sliowini: !) spdUt'S is 

 givL'ii. (Fig. :V). 



Tkochodota uoKiiUCKi, sp. 11. (Plate T., Figs 4 (a), (1)), (c).) 



Locditf //. — T()i([uay. 



Lengtli 7.") mm., l»-ea(ltli 6mm.; vermit'onn ; coldui-. wd. Tvu 

 tentacles, the two v^'iitial of wiiieh are about half the length <>f 

 the dorsal. Each tentacle has 1)ut four digitations, the two 

 proximal of which are about one-third of the lengtli of the disTal. 

 Deposits of two kinds, consisting of wheels meusui-ing SO ^ in 

 diameter, and sigmoid bodies (Figs. 4 a and e), 130 /a in length. 

 The wheels have six spokes; the rim is hexagonal, its innei' margin 

 is coarsely serrated around its whole circumference. The sexes are 

 apparently separate. The genital glands are unbianched. There 

 is a single polian vessel, and one madreporal canal, which is fused 

 to the dorsal mesentery. Mi-. Koebuck collected several specimens 

 from beneath stones at Torquay, and I have since met with tliem in 

 the same locality. The animal would appear to ])e very close to the 

 European species, Trochodofa reiitisfa, Semon. However, the pro- 

 portion of the digitations on the tentacles and the form of the wheel 

 ossicles differ from the illustrations of these structures, given respec- 

 tively by Clark (3) and Ludwig (16) for venu'^fa. I have, unfor- 

 tunately, been unable to refer to Semon's original paper. The 

 variation in the size of the tentacles is quite constant, and has been 

 •determined by the examination of numerous specimens, both in a 

 living and preserved condition. They increase gradually in size 

 from the venter to the dorsum. 



BIBLIOGRAPHY. 



(1) Bell, F. Jeffrey. — " Holothuroidea, descriptions <if new 



species." Proc. Zool. Soc. London. June 21, 1887. 



(2) Bell. F. Jeffrey. — " Notes on Echinoderms collected in Port 



Phillip." Ann. Mag. Nat. Hist., vol. ii.. pp. 401-407. 

 London, 1888. 



(3) Clark, H. L. — " The Apodous Holothurians."' Sniitlisonian 



Contributions, vol. xxxv. Washington. 1907. 

 <4) Dendy, A. — " Observations on the Holothurians of New Zea- 

 land, with descriptions of four new species." Journal 

 Linnean Society, Zoology, vol. xxvi. London, 1898. 



