8 TESTACELLA. 



Genus TESTACELLA, Cuvier, 1800. 



The twenty species are mostly European, and the differences 

 in the form of the shell upon which they are distinguished are 

 so small, that it is probable they are, for the most part, local 

 varieties rather than species. Several species are found in 

 European tertiaries. On the habits of Testacella, see " Struc- 

 tural and Systematic Conchology," iii, 11, 12. 



T. MAUGEI, Fe'r. PI. 1, figs. 1-3. 



Animal varying in color from grayish black through various 

 shades of brown ; rarely greenish or white. Length, 3 inches. 



Shell oval-oblong, with nearly parallel margins, a little dilated 

 anteriorly ; columella wide, callous, not truncate in front ; epi- 

 dermis greenish or brownish. Length, 13-17 mill. 



England, France, Portugal, Canaries, Madeira, Azores. 



This is T. Burdigalensis, Gassies, T. oceanica and T. Canari- 

 ensis, Grateloup. As a fossil it has received the names of T. 

 Deshayesii, Michaud, and T. Altse-Ripse, Grat. 



T. EPISCIA, Bourg. PI. 1, figs. 4-6. 



Shell auriform, ovate, margins rounded ; whorls 1^, the apex 

 small, smooth, body-whorl irregularly striate-sulcate ; columella 

 flattened, curved. Length, 9 mill. Nice, France. 



T. COMPANYONII, Dupuy. PI. 1, figs. T, 8. 



Shell ovately auriform, the sides somewhat compressed, nar- 

 rowed in front, convex above and strongly irregularly striate ; 

 spire rather small, obtuse, somewhat produced posteriorly; 

 aperture slightly narrowed anteriorly, rounded posteriorly, 

 columella callous, subtruncate anteriorly ; epidermis grayish 

 black, interior whitish pearly. Length, 17 mill. 



Eastern Pyrenees. 

 It is T. Canigonensis, Gratel. 



T. PASCALT, Bourg. PL 1, fig. 9-11. 



Shell solid, thick, ovately auriform, upper surface strongly 

 sulcate, corneous; apex minute, produced, smooth; aperture 

 ovate, with a superior sinus at the junction of the columella and 

 outer lips, columella much thickened above, subtruncate below. 



Length, 10 mill. France (Dep. Haute- Loire). 



Pretty closely related to the preceding species. 



