WALDHEIMIA. 211 



Lapland and Sitka {3Iiddendorff'). It has been found fossil at 

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

 (Drexler 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. 



Ocnus VTAI.DIIEIMIA, King. 



Shell smooth. The genus Waldheimia has the internal append- 

 age composed of two 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. 



Waldlieimia cranium. 



Surface smooth, whitish, minutely punctured. 



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



Terebratulu cranium, Muller, Zool. Dan. Prodr. 249, No. 300G. — Montagu, Trans. Lin. 

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

 Forbes and IIanl. Brit Moll. ii. 357, pi. 57, fig. 10. — Loven, Ind. Moll. Scand. 29. 



A single specimen, ol)tained 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 glol)os<', 

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

 tured ; color ycllowish-wdiitc. The more minute characters were 

 not noted. 



