[Proc. Uot. Hoc. Vktokia. 25 (N.S.). I'r. I.. li»12j. 



Akt. V. — On a new Holothiiriau of the Genus Taenlogyrus 

 found III Port Pliillip Bay. 



Bv K. C JOSHUA. 



(With Platf>s \U. .111.1 lY). 

 [Read llth April. 1912]. 



Tacnioifyrus alln.ni, sp, nov. 



The L'hiridntinid of which a description follows was first dredged 

 by Mr. J. M. Allan, near Geelonp:. and was subsequently found by 

 myself near Willianistown. 



Descri ptioii. — Tentacles ten, peltato-digitate, pigment spots at base. 



Size. — 8 centimetres in length, breadth about 6 mm. 



Colour. — Carmine in life, in spirits white. 



Calcareous deposits, consisting of wlieels, sigmoid bodies, and rods. 

 The wheels are principally confined to the three dorsal interambulacra 

 and are grouped in round and irregularly-shaped papillae, except at 

 the anterior and jw-terior ends, where tl.tv are thickly disposed all 

 round the body. They haA'e six spokes connecting with a peripherally 

 hexagonal rim, the inner margin of which consists of alternate serrated 

 convexities and unserrated smaller concavities. One side of the hub 

 of the wheel is closed by a six-rayed plug, the other is open and sur- 

 rounded V)y a dentated margin. The sigmoid bodies are scattered 

 singly at fairly regular intervals and roughly at right angles to the 

 axis of the body ; they occur equally in all the interaml)ulacra. The 

 rods are confined to the margins of the tentacles and to the inter- 

 tentacidar web. 



Habitat. — On nuid banks, in from f) to 10 fathoms, Port Phillip 

 Bay. 



AiKitonnj. —Genital glands : Two, single, unbranched, sexes separate. 

 Alimentary canal : Contorted axially. 

 Polian vessel : Single. 

 Stone canal : Ap|)arently absent. 

 Calcareous ring: Consisting of ten pieces. 



Two mounted specimens of an animal, which Mr. Allan declares 

 to be identical with the present species, were sent l)y that gentleman 

 to the President of the Royal Microscopical Society, London, who 

 in turn submitted one of them to Professors R. Koehler and C. Vaney 

 of Lyons. Prof. Vaney identified the specimen as Trorhodota 



