WALDHEIMIA. 211 



Lapland and Sitka (^Mlddendorff^. It has been found fossil at 

 Beauport {Daivson} ; and at Cape Hope, James's Bay, 52° 10' N. 

 (^Drexlcr Coll.}. Hence, though nowhere abundant, this species 

 seems to be circumpolar. The young specimens are fragile and 

 sea-green ; but the old ones become solid, globose, and tar-colored. 



Ocniis WALDHEIMIA, King. 



Shell smooth. The genus Waldhelmia has the internal append- 

 age composed of tvYO free slender branches arising from the hinge, 

 which advance about two thirds the distance across the shell, then 

 curve upwards and backwards, then inwards, and unite at the 

 centre. 



Waldheimia cranium. 



Surface smooth, whitish, minutely punctured. 



Anomia cranium, Gmel. Syst. Nat. 3347. — Turton, Conch. Diet. 5. 



Terehratula cranium, Muller, Zool. Dan. Prodr. 249, No. 300C. — MoxTAGD, Trans. Lin. 

 Soc. xi. 188, pi. 13, fig. 2. — Brown, 111 Conch. Gr. Brit. 68, pi. 22, figs. 10- 12. — 

 Forbes and Hanl. Brit Moll. ii. 357, pi. 57, tig. 10. — Lovix, Ind. Moll. Scand. 29. 



A single specimen, obtained by Mr. Willis at St. Margaret's Bay, 

 seemed to me to come under this species. The specimen was small 

 and imperfectly examined. It was rounded-ovate, rather globose, 

 thin and translucent, the surface without grooves, but finely punc- 

 tured ; color yellowish-white. The more mniutc characters were 

 not noted. 



