Molhtsca. 211 



This species is the giant of the genus, one of the examples in the 

 present collection measuring nearly four inches in length and more 

 than two inches across. Externally this shell bears a strong 

 resemblance to Mtja, tnincMa of northern and Arctic seas. 



CARDITA ASTARTOIDES. 



Cardita astartoides. Martens ; vide Smith, Lamellib., ' Challenger' Exp., p. 212, 

 PI. XV., figs. 2-2c. 



Habitat. — Cape Adare, 24 fathoms. 



Also known from Kerguelen Island and in 150 fathoms between 

 that island and Heard Island. Only one small specimen obtained 

 by the present expedition. 



VENUS (CHAMELAEA) MESODESMA. 



Venus (Chamelaea) Mesodesma, Quoy and Gaimard ; vide Smith, ' Gludhmjcr ' 

 Hep., Laniellibranchiata, p. Vil. 



HaUtat.—A\\ck\-A\\i\ Islands, 10 fathoms. 



One small example of a yellowish grey tint, without any colour- 

 markings. New Zealand and Tristan da Cunha are other localities 

 for this well-known species. 



YOLDIA EIGHTSI. 



Wucula eightsii, Couthouy; vide Jay, Cat. Shells, 1839, ed. iii., p. 113, PI. I., 



figs. 12, 13, 

 Leda (Yoldia) eights!, Hanley, in Soweiby's Thes. Conch., A'ol. III., p. 142, 



PL CCXXX., fig. 164. 

 Yoldia eightsi, Sowerby, Con. Icon., Vol. XAHII., PI. V., fig. 26. 



Hahitat.—Ym\±Yn\ Island, 10 fathoms. New South Shetland 



('Tay). 



Allied to Y. suhaequilateralis (Smith), from Kerguelen Island, but 

 distinguishable by its different form and larger cartilage-pit. The 

 periostracum also is darker, and the valves a little more convex. 



p 2 



