HAMINEA. 353^ 



color-pattern, while such of the oriental forms as are known are 

 more boldly spotted. The food of the European species is exclus- 

 ively vegetable, consisting of algte and zostera. 



European species. 



There are three European species of Haminea : H, navicular 

 distinguished by its large size, very concave columella and spiral 

 striation. H. hydatis, smaller (rarely over 12 mill, alt.) with 

 straighter columella and more effaced spiral striation. H. orbig- 

 NYANA, about the size of hydatis, but having the upper curve of 

 the lip prolonged high above the vertex. 



H. NAVicuLA Da Costa. PI. 41, figs. 17, 18. 



Shell thin, oblong-cylindric, truncated above, rounded below ; sur- 

 face corneous or lemon-yellow, marked by irregular grouih wrinkles^ 

 and shoiving all over under a lens, excessively fine spiral wavy en- 

 graved grooves, far narrower than their interspaces. Vertex imper- 

 forate, concave and white in the middle. Outer lip slightly arcu- 

 ate, rounded above and below, a little thickened, but not twisted 

 toward the upper insertion. Columella very concave, thin, reflexed ; 

 parietal callus thin. Alt. 23, diam. 16 mill. 



Atlantic coast of Europe from England to Spain; Mediterranean 

 Sea. 



Bulla ampulla Pennant (not L.) Brit. Zool. no. 84, 1776. — B^ 

 navicula Da Costa Brit. Conch., p. 28, pi. l,f. 10, 1778 — Buquoy, 

 Dautz. & DoLLF., Moll. Rouss. i, p. 517, pi. 63, f. 4-7.— B. hydatis^ 

 Brug., Enc. Meth., p. 374, in parf— Forbes & Hanley, Hist. 

 Brit. Moll., iii, p. 530, pi. 104d, f. 7 (shell) ; pi. uu, f 3 (animal). 

 —Jeffreys, Brit. Conch., iv, p. 437; v, pi. 95, fig.3.— Sowb., 

 Conch. Icon., f. 4, and of authors generally. Not B. hydatis ILinne. 

 —Bulla cornea Lam., An. s. Vert, vi, p. 36, 1822.— Hanmiea cuvieri 

 Leach, Syn. Moll. G. B., p. 41, 1852.— Haminea suhpellucida H.. 

 Ad., p. Z. S. 1869, p. 275, pi. 19, f. 13. 



This species is generally known as H. hydatis, but it is quite dis- 

 tinct from that species in the larger size, much stronger spiral stria- 

 tion, more marked growth wrinkles, more concave columella, etc. 

 The bibliography of the form is extensive, as usual with European 

 species, but is mostly under'the names hydatis L. and cornea Lmk. 



Var. globosa Jeflfr. (pi. 41, fig. 17). More globular. Var. globoso 

 major Monts. Large and globose. Venice. Var. expansa Monts. 



