ITAZATLAN UNIVALVES 265 



vol. X. pi. 168, f. 1626— 7 ■.—Dilhc. Rec. Shells, p. 1018, 

 no. 6:— = Calyptrfea (Trochatella) t. B. M. Cat. D'Orb. 

 Moll. p. 48, no 411 :— + Patella trochoides, Dlllw. loc. cit. no. 

 7:— +CalyptrEea Araiicana, Less, (teste D'Orh. Cat.) — 

 ?Jun. = Calyptr;sa dilatata, Sotv. Gen. f. 9, (non Crepidula 

 d., f. 5.)— Calyptraja radians, (max.) Vcd. Voy. Ten. pi, 14, 

 f.^3; pi. 15, f. 4. 



Of tkis beautiful species, besides the specimen here des- 

 cribed, I have seen only one other, in the collection of T. 

 Nuttall, Esq., from an unknown locality. It diiFers from the 

 S._ American T. radians, (also quoted from Benguela and St. 

 Vincent, Guinea, on the authority of Dr. Tarns ; and of which 

 a remarkably conical variety is figured in Beechey's Voyage ;) 

 and also from the Gulf species, T. spirata, in the great con- 

 vexity of the whirls, which are so produced at the shoulder 

 that the sides of the sutiu'e form nearly a right angle. It ap- 

 proaches most nearly to a fossil species from Dax, which 

 however has the base still more concave. The Infundibulum 

 Californicum, JI. Ad., (P,'oc. Zool. Soc. 1851, p. 153,) which 

 from its name might be supposed to have some connection, is 

 a species of Polydonta, (Trochinai.) Biam. "74, alt. '64, (cuius 

 anf. ult. -48,) div. 110". 

 JIab. — Mazatlan ; one fresh sp. ; L'pool Col. 



Tablet 1316 contains the specimen. 



Genus GALEEUS, Gray. 



Galerus, Riiniph. 1797 -.—Gray, Proc. Zool. Soc. 1847, p. 157, 



no. 269 -.—Phil. Ilandh. Conch, p. 187 -.—S. Sf A. Ad. Gen. 



vol. i. p. 367. 

 Trorliita (pars,) Schum. 1817.— Calypti-sea (pars,) Lam. 1822.— 



Si|)hopatella (pars,) Brod. 1834. — Infundibulum, pars, J. 



6'ow.— Trochatella, pars, B'Orb. 

 Mitrula, Gray, 1821.— Trochilca, Swains. 1837. 



This genus is intermediate between Crepidula or Crucibulum, 

 and Trochita. The shell is conical, slightly spiral, with a 

 rapidly ascending spiral lamina, doubled in upon itself. Unfor- 

 tunately, no verj^ young shells were found of this section. The 

 plane of the vertex is parallel to the base in all observed species. 



332. Galerus conicus, Brod. 



Calyptraa (Siphopatella) conica, Brod. Proc. Zool. Soc. 1834, 

 1?. 38 -.—Trans. Zool. Soc. vol. i. p. 202, .pi. 27, f. I.—Mull. 

 July 1856. a 



