212 SMITH : ON THE GENUS ASTARTE. 



1874. Astarte crebricostata Mobius. Zweite Deutsche 



Nordpolarfahrt, vol. ii., p. 252. — ^.^^-^ ^t^ i*ir-2^ ." 



1875. A. crebricostata Morch. Arctic Manual, p. 131. 



1878. A. crebricostata Sars. Norges Arkt. Fauna, p. 54, pi. 



v., f. 7 (2 — b. 



1879. A. crenata (non Gray) Norman. Journ. of Conch., 



vol. ii., p. 44. 



1880. A. crenata (non Gray) Verrill. Proc. U.S. National 



Mus., p. 399. 



Var. ASTARTE SUB^QUILATERA Sowerby. 



1854. Astarte subsequilatera Sov>'erby. Thes. Con., vol. ii., 



p. 780, pi. clxvii., f. 13. 

 1874. A. subsequilatera, id. Con. Icon,, vol. xix., f. 5, 



Habitat. — Finmark, Lofoden Islands; var. subcequilatera, 

 Newfoundland ; var. from East Greenland (Mobius). 



The synonymy of this species given by Try on in the Proc, 

 Acad. Nat. Sci. Philad., 1872, p. 246, is most remarkable. 

 Under this species amongst others are included — A. elliptica, A. 

 p07-tlandica, A. quadrans and A. incrassata Brocchi, the latter 

 being held distinct from A.fusca of Poli ! ! 



Mr. Verrill considers the American form "unquestionably 

 distinct" from the European. He observes that it is "more 

 compressed, more rounded, lighter and brighter yellowish 

 in colour, and generally has much more numerous and regular 

 undulations. The hinge is also quite different." On the con- 

 trary Gould in speaking of this shell observes " In the way of 

 form there is nothing to distinguish this species from others. It 

 undergoes all the variations of altitude and elongation, of 

 acumination and truncation, inflation and compression, that are 

 observed in others." I have not been able to examine any 

 ,Aniierican specimens so cannot express any definite opinion 



J.C.iii., Julj', 1881 



