408. 
SHELLS OF SOUTH AMERICA. 
Fam. 16. VERMETIDZ. 
VERMETUS VARIANS, d’Orb. Voy. v. 456. t. 54. 
f. 7-10. 
Brazils. 
Operculum orbicular, thin ; nucleus central. 
406. 
407. 
408. 
409. 
410. 
Fam. 17. CREPIDULIDZ. 
Piteopsis UnGaricoipEs, d’Orb. Voy. v. 457. 
t. 78. f. 4. 
Peru; Payta. 
CALYPTRa&A (CALYPEOPSIS) QUIRIQUINA, d’Orb. 
Voy. v. 459. 
Calyptreea quiriquina, Lesson. 
Chili; Concepcion. 
CaLyeTraa (CALYPEOPSIS) RUGOSA, d’ Orb. Voy. 
v. 409. 
Calvptreea rugosa et C. umbrella, Desh. 
Calypireea rudis, C. lignaria et C. tenuis, Brod. 
Chili. 
CaLypTr#A (CALYPEOPSIS) IMBRICATA, d’Orb. 
Voy. v. 460. 
Calyptreea imbricata, Sow. 
Calyptrzea rugosa, Brod. 
Peru; Payta. 
Catyprrma (CALYPEOPSIS) AURICULATA, d’Orb. 
Voy. v. 461. 
Patella auriculata, Chemn. 
Calyptreea spinosa, Wood, Brod. 
Calyptreea tubifera, Lesson. 
Dispolia tubifera, Say. 
Peru; Payta. 
47 
B.M. 
B.M. 
B.M. 
B.M. 
B.M. 
B.M. 
Calyptrea quiriquina, C. rugosa, C. lignaria and C. imbricata 
are varieties of the same species, differmg in the smoothness or 
costation of the outer surface ; some specimens which are costate 
when young become smooth as they increase in size and vice 
