122 BOOK OF SPECIES. 



angulated, white, with the extremities tinted with 

 pink, and marked with a round wart encircled 

 by a hollow; lip toothed. 1. W. 18. 10. 



O. GiBBosA. Ovate-oblong, obtuse on both 

 sides, girded with an elevated obtuse angle ; white, 

 with rather an orange tint ; lip smooth, but ob- 

 soletely toothed. 1. W. 18. 11. 



CYPREA. 



Shell oval or oval-oblong, convex, margins turned 

 inwards ; aperture longitudinal, narrow ; both 

 lips toothed; effuse at both extremities; spire 

 very small, scarcely apparent. 



C. EXANTHEMA. Obloug, fcrrugiuous, with 

 large whitish round spots, which as they near 

 the base become ocellated; dorsalline pale; vio- 

 let within ; teeth brown, from two to five ; spire 

 evident. W. 16. 1. 



C. ARCUs. Oblong, sub -cylindrical, fawn- 

 colour, with brown rings above, and four large 

 dark spots at the base ; teeth brown ; three ; spire 

 as last. W. 16. 5. 



C. TESTUDiNARiA. Obloug, sub-cyliudrical, 

 depressed at the extremities, and marked like tor- 

 toise-shell, the dark parts of which, when perfect, 

 are freckled with white ; aperture white ; four ; 

 spire as last. W. 16. 6. 



C. MAURiTiANA. Ovate, gibbous, intense 



