266 MABATLAX UNIVALVES 



Syn. Null. Test. Viv. p. 147. — (Calyptrsea c.) Lam. An. s. Vert. 



vol. vii. p. 630, no. 17. — C. B. Ad. Pan. Skelh, p. 220, 



no. 333.— rC. Trochatella c.) MA-e. Zeit. f. Mai. 1851, p. 30. 



no. 126.— (Galenis c.) H. Sf A. Ad. Gen. i. 368. 



The nuclear vertex in tliis species is generally eroded ; but, 

 when perfect, resembles that of G. Sinensis, about '02 across, 

 not promiiient, with the outer wliii-l enveloping the rest, apex 

 not visible. The colour is of a beautiful pinkish brown, 

 lustrous, uniform over the shell, and variously stained or spot- 

 ted. The lamina makes a rapid ascent to the margin, is much 

 flattened, with the inner edge elegantly rounded, recurved 

 over from 3-4ths to 4-5ths of its breadth, and a third part of 

 its length. The recurved part is open, but not swollen within. 

 Long. 1-27, lat. Ill, alt. -66. 



Sah. — Xipixapi and Salango, attached to shells in deep water, 

 Cuming. — Panama, veiy rare, C. B. Adams. — S. \V. Mexico, 

 P. P. C. — Mazatlan ; extremely rare ; L'pool Col. 



Tablet 1317 contains 4 sp. of which the youngest is "08 across, 

 and the next is coloured as in C. lichen, Brod. 



388. Galeeus mamillaets, Brod. 



Cal3'ptra'a (Siphopatella) mamillaris, Proc. Zool. Sac. 183-1, 

 p". 38 ■.—Trans. Zool. Soc. vol. i. p. 201, pi. 28, f. 5.— (Calj-p- 

 tra^a m.) Lam. An. s. Vert. vol. vii. p. 631, no. 18. — (Galerus 

 m.) H. Sf A. Ad. Gen. i. 368.— (Non C. Ti'ochatellam. B. M. 

 Cat. UOrh. Moll. p. 48, no. 412.) 

 + CalvptrcTa regularis. C. B. Ad. Pan. Shells, p. 224, no. 340 :— 



id. J). 320.— (Galerus r.) JJ. Sf A. Ad. Gen. i. 368. 

 = Calyptra?a (Trochatella) Lamarckii, Mke. Zeit. f. Mai. 1847, 

 p. 186, no. 37:— id. 1851, p. 36, no. 125.— (Non Desh. Lam. 

 An. s. Vert., vol. vii. p. 627. no. i).) 

 ? + Calyptra^a (Siphopatella) Lichen, Brod. Proc. Zool. Soc. 

 1834, p. 37 -.—Tran^. Zool. Soc. vol. i. p. 201, pi. 28, f. 4.— 

 (Calyptrica 1.) Jjam. An. s. Vert. vol. vii. p. 630, no. 16. — 

 (Galerus 1.) H.SfA.Ad.x. 368.-(Teste B. 3L Cat. D'Orb. 

 Moll. p. 48, no. 4r2, = "lorica" err. typ.) 

 The specimens of G. mamillaris in the Cumingian collec<ion 

 vary greatly in colour and sculpture. Some of these, as well 

 as G. lichen, closely resemble the young of G. conica. A 

 microscopic examination of the nuclear vertices would pro- 

 bably decide the question. The vertex of G. mamillaris is 



