GLYPHIS. 217 



G. TONGANA Quoy & Gaimard. PL 59, figs. 38, 39. 



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

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

 nated. 



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

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



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, 1. c. p. 67, t. 4, f. 10. 

 REEVE, Conch. Icon f. 94. F. imbricata SOWB. 2c, 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. PL 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 



