REPORT ON THE LAMELLIBRANCHIATA. 131 



Habitat. — Station 201, off the west coast of the isLiud of Mindanao, Pliilippine 

 Islands, at a depth of 82 fathoms ; stones and graveL 



Venus [Leukoma) australis, So\verl)y. 



Venus australis, Sowerby, Proc. Zool. Soc. Lond., 1835, p. 22. 



Venus midralis, Sowerby, Thesaurus, p. 719, pi. clvii. figs. Ill, 112. 



Venus australis, Hanley, Recent Shells, p. 118, pi. xv. fig. 48. 



Venus australis. Reeve, Concli. Icon., fig. 107, a, h. 



Chione australis, Deshayes, Cat. Conchif. Erit. Mus., p. 142. 



Venus {Chione) (Lcidfoma) aiisiralis, Romer, Mai. Bliitt. 1867, vol. xiv. p. 102. 



Habitat. — Port Jackson, Sydnej', in 5 to 7 fathoms (Challenger) ; Swan River 

 (Deshayes). 



Venus {Chamelcea) tnesodesma, Qnoy and Gaimard. 



Venus mesodesma, Qnoy and Gaimard, Voy. " Astrolabe," vol. iii. (1834), p. 532, pL Ixxxiv. 



figs. 17, 18. 

 Venus crassa, Quoy and Gaimard, loc <•!!., p. 525, pi. Ixxxiv. figs. 7, 8. 

 Venus denticulata, Quoy and Gaimard, loe. cit., p. 530, pi. Ixxxiv. figs. 14, 16. 

 Venus vinlacea, Quoy and Gaimard, Joe. cit, p. 533, pi. Ixxxiv. figs. 19, 20. 

 Venus sinssa, Deshayes, Anim. sans Vert., vol. vi. p. 373. 



Venus spissa, Hanley, Cat. Biv. Shells, p. 117, Appendix, p. 358, pi. xvi. fig. 44. 

 Venus spurca, Sowerby, Proc. Zool. Soc. Lond., 1835, p. 23. 

 Venus spurca, Sowerby, jun., The.saurus, vol. ii. p. 719, pi. clvi. figs. 92-98. 

 Venus spurca. Reeve, Conch. Icon., vol. xiv. figs. 90, «, /'. 

 Chione mesodesma, Hutton, Man. X. Zeal. Moll., p. 148. 

 Ve7ms {CJtione, sect. Chamelwa) mesodesma, Rdmer, Mai. Bliitt., 1867, vol. xiv. p. 113. 



Habitat. — D'Urville Island, New Zealand, on the beach ; also Station 135e, off 

 Tristan da Cunha, at a depth of 1000 fathoms. Hard ground, shells and gravel. 



The localities " Valparaiso and the Philippine Islands," assigned to these species by 

 Sowerby and Reeve, reqnii'e confirmation. Two specimens from Tristan da Cunha, as 

 might be expected, differ slightly from the usual form of the species. They are of a 

 rather less triangular shape, the posterior side being rather broader than in New Zealand 

 examples, and the umbones are placed a trifle nearer the anterior end than in most 

 specimens. They are whitish, destitute of any brown markings, and in one instance 

 reddish at the umbones. With the exception of these few slight differences I cannot 

 discover any characters which could be regarded of sufficient importance to separate 

 specifically these two shells from this well-known and common New Zealand form. 

 Although far apart, the two localities are almost on the same parallel. 



