418 Transactions. — Zoology. 



h.s.', opening of hepatic sinus into preoaval s.v.', aperture leading from precaval sinus 

 sinus. into sinus venosus. 



hce., hcemorrhoidal veins. v., ventricle. 

 i.ju. inferior jugular vein. 



Fig. 2. The portal vein of Raja nasuta (half nat. size). 

 du., duodenal vein. 

 g., gastric vein. 

 m.s.^ mesenteric vein. 



m.s.', main factor of mesenteric vein from colon. 

 p. main trunk of portal vein. 

 pn., pancreatic veins. 



Aet. LXI. — On a new Holothurian (Chirodota dunedinensis, n.sp.). 

 By T. Jeffery Paekek, B.Sc, Lond., 

 Professor of Biology in the University of Otago. 

 [Read before the Otago Institute, 1st February, 1881.] 

 This representative of a genus and family hitherto unknown in New Zea- 

 land appears to be extremely common in Otago harbour. I found it first 

 between Logan's Point and Eavensbourne, and afterwards, in great abun- 

 dance, at Broad Bay, both times entangled in the red seaweed between high 

 and low water marks. 



As I hope to have the opportunity of working at the anatomy of the 

 species, I confine myself now to recording the discovery, and giving the 

 sytematic characters of the genus and species. 



Genus Chirodota, Eschscholtz. 

 Worm-like ; calcareous spicules in the form of wheels imbedded in the 

 skin ; tentacles shield-shaped, produced at the edges into finger-Uke processes 

 (Tentacula peltato-digitata) . 



C. dunedinensis, T.J.P. 

 Tentacles ten, each with about ten processes, which increase in size 

 progressively fi'om the proximal to the distal end. Integument quite smooth, 

 there being no tentacles or papilla. Colour yellowish (owing to the bright 

 yellow viscera shining through the translucent skin) with small crimson 

 spots which disappear in spirit ; tentacles whitish, with dark spots on the 

 inner side at the base ; these spots are unaffected by spmt. Length, in the 

 extended condition, about 4 cm. 

 Otago harbour : littoral. 



