204 GLYPHIS. 



Group of G. calyculata Soivb. 



Shell having several of the posterior radiating ribs much more 

 prominent than the others. 



G. cahjculata has almost as distinct a septum and pit behind the 

 hole as some species of Pancturella. 



G. calyculata Sowerby. PI. 36, figs. 17, 18. 



Shell ovate, angular behind, elevated, conical ; front slope con- 

 cave, posterior slope convex. There are three or four very promi- 

 nent ribs radiating backward from the vertex, the intervals between 

 them each bearing three riblets ; sides and front of the shell having 

 numerous subequal riblets; the whole latticed by numerous concen- 

 tric laminae, about a half mill, apart, cutting the interstices into pits 

 and forming low scales on the radiating riblets. 



The color is pink, with dots, and radiating and concentric lines 

 of red. Inside pinkish-white; there is a very deep pit just behind 

 the nearly round hole. Length 16, width 10?, alt. 7 mill. 



Natal, near Cape L'Agulhas. 



F. calyculata Sowb., Genera of Shells, Cephala, Fissurella, f. 4 ; 

 Illustr. Conch, f. 19.— Reeve, Conch. Icon. f. 88, 109.— Sown. 2d., 

 Thes. p. 193, f. 126, 127.— Krauss, Die Siidaf. Moll. p. (JS. 



May be known by the three strong, imbricated posterior ribs and 

 the very deep pit behind the hole-callus. The coloration is more 

 or less rosy. 



G. sieboldii Reeve. PI. 38, figs. 58, 59. 



Shell ovate, angular behind, elevated, conical; slopes nearly 

 straight; hole in front of the middle, its posterior margin elevated. 

 Sculpture consisting of about 11 strong radiating ribs, of which those 

 at the back and sides are strongest, bearing three riblets in each 

 interval ; in front the ribs alternate with smaller ones. The 

 whole latticed by elevated, separated concentric laminae, forming 

 scales on the ribs; between these laminae there may be seen fine con- 

 centric threads or striae, two or three in each interval between the 

 lamellae. 



The color is whitish, variegated with ashen or dotted on the ribs 

 with pale flesh-color; orifice small, shortly oblong ; hole-callus nar- 

 row, truncated behind ; margin serrated. Length 17, breadth 11, 

 alt. 7 mill. 



Singapore to Japan. 



