3Ii-. E. A. Smith on Arctic MoUusca. 143 



Astarte lactea, Brod. & Sow. Zool. Journ. iv. p. SOo ; Beechey's 

 Voyage, pi. 44. f. 12 ; Sow. Thesaurus, pi. 167. f. '2S; Reeve's Conch. 

 Icon. xix. f. 18. 



Crassina corrugata ?, Brown, Recent Conchol. ed. 2, p. 96, pi. 40. f. 24. 



A. Richardsoni, Reeve, Belcher's Voy. vol. ii. p. 397, pi. 33. f. 7. 



Hob. Dumb-bell Harbour {Feilden) ; Discovery Bay, 5 fms. 

 {Feilden aud Hart). 



The blackness of the epidermis in A. lactea is due, I think, 

 to the specimens having been collected when dead ; for all 

 the shells with this kind of dark epidermis are old and worn, 

 and evidently have been untenanted by the living animal for 

 some time. 



Astarte striatUj Leach. 



Nicania striata, Leach fnon Brown), Ross's Voyage, Appendix, p. 176 ; 



Thomsou's Annals of Philosophy, xiv. p. 204. 

 Astarte Banksii, Gray (non Leach), Beechey's Voy. p. lo2, pi. 44. f. 10 



(fig. 9 is the true C. Banksii) ; Sowerby's Thesam-us, ii. p. 781, 



pi. 167. f. 8 ; Conch. Icon. xix. sp. 7 ; Mcirch, Arctic Manual, p. 132. 

 Var.=^. f/l»bosa, Moller, Naturhist. Tidsski-ift, 1842, p. 93 ; Reeve, 



Belcher's Voy. pi. 33. f. 6 a, b. 



Hah. Franklin-Pierce Bay, 15 fms. [Feilden and Hart). 



The shell figured and described by Gould (Invert. Mass.ed. 2, 

 1870, p. 125, f. 438) under the name of A. Banhsii of Leach, 

 is not the species characterized by that author. I should sup- 

 pose that Gould did not consult Leach's description in the 

 appendix to Ross's ' Voyage,' as he does not quote the page, 

 but probably followed Sowerby in the determination of the 

 species (' Thesaurus Conch.' ii. p. 781, pi. 167. f. 8), who 

 probably was misled in the identification of this shell by the 

 figures in the Appendix to Beechey's '■ Voyage.' In this work 

 figure 10 on plate 44 is referred to in the text, p. 152, under 

 the name of ''^Astarte Banksii?, Gray, in Brit. Mus.," and 

 figure 9 on the same plate is said to represent " Astarte 

 striata ?, Gray, in Brit. Mus." 



The description of Banksii given by Leach runs thus, 

 " glabriuscvda polita, subumbonibus impresso-excavata ;" and 

 that of striata as follows, " concentrice striata, sub umbonibus 

 cordato-impressa." 



Of these two species there are specimens in the British 

 Museum received from Captain Ross, which, in all probability, 

 are the actual types described by Leach, and which at once 

 show that the figures of the two species in Beechey's ' Voyage' 

 are reversed — fig, 9, in fact, representing the true Banksii, and 

 fig. 10 the true striata. The former is a smooth, glossy shell 

 (" glabriuscula polita"), and only marked with very fine 

 concentric striations or lines of growth, which do not at all 



