GLYPHIS. 



217 



G. tongana Quoy & Gaimard. PI. 59, figs. 38, 39. 



Shell ovate-oblong, convex, white; vertex a little compressed; 

 ribs rugose, cancellated by transverse stride ; hole oval ; margin cre- 

 nated. 



There are 15 prominent ribs, with smaller ones between them. 

 Length 22, width and alt. 14 mill. (Q. & G.) 



Island of Tonga Taboo, S. Pacific. 



F. tongana Q, & G., Voy. Astrol. p. 335, t. 68, f. 3, 4. 



G. ruppellii Sowerby. PL 39, fig. 8 ; pi. 39, figs. 82-85. 



Shell elliptical, elevated, the apex decidedly curved forward ; 

 front slope concave ; posterior slope convex ; orifice of a squarish- 

 oblong form, about one-tenth the length of the shell. Sculpture 

 consisting of very numerous subequal or visibly alternating radia- 

 ting riblets, latticed by close concentric raised threads, forming 

 beads where they cross the riblets. These threads are about 1 

 millim. apart on the posterior surface. 



Color grayish-white, having about 8 broad blackish rays. Inte- 

 terior bluish-white, with narrow radiating white lines ; hole callus 

 oval, indistinctly truncated behind. Margin crenulated, the den- 

 ticulations in pairs. Length 25, width 16, alt. 11 mill. 



Red Sea ; Mauritius ; Cape of Good Hope. 



F. ruppellii Sowb., P. Z. S. 1834, p. 128 ; Conchol. Illustr. f. 65, 

 75.— Reeve Conch. Icon. f. 54.— Sowb., Thes. p. 197, f. 107, 108.— 



F. elevata Dkr. in Phil., Abbild. ii, p. 67, t. 2, f. 4. — Krauss, Die 

 Sudaf. Moll. p. 67. — F. australis Krauss, I. c. p. 67, t. 4, f. 10. — 

 Reeve, Conch. Icon f. 94. — F. imbricata Sowb. 2d, Thes. iii, p. 194, 

 f. 162. — F. nigriradiata Rve., Conch. Icon. f. 81, 1850. 



The strongly elevated apex, curved forward, and the closely, 

 evenly latticed sculpture are characteristic. The hole is squarish- 

 'oblong. Figures 82-85 represent the F. australis Krauss. F. ele- 

 vata Dkr., described from the Cape of Good Hope, seems to have 

 no differential characters. The F. nigriradiata seems to be a young 

 specimen of this species ; it might possibly be young G. listeri. 



G. dubia Reeve. PI. 39, fig. 6. 



Shell ovate, attenuated anteriorly, depressed, radiately ribbed, 

 and filled with numerous fine concentric ridges ; orifice oblong, 

 rather broad, contracted in the middle; irregularly stained and 



