GLYPHIS. 209 



A beautifully sculptured form ; the interstices are very deeply 

 carved, the concentric lamellae are elaborately frilled. 



G. CYATHULUM Reeve. PI. 39, fig. 95 ; pi. 61, figs. 16, 17. 



Shell ovately conical, elevated, radiately sharply squamately 

 ribbed, ribs alternately larger, latticed with narrow, concentric 

 ridges ; orifice small, ovate ; whitish, variegated with brown. Some- 

 what like F. excelsa but not so elevated, more coarsely latticed, and 

 differently perforated, (five.") 



Habitat unknown. 



F. cyathulumRw., Conch. Icon., f. 114. Sows. Thes., p. 194, f. 

 152, 153. 

 G. EXCELSA Adams & Reeve. PL 64, fig. 33. 



Shell elevated-conical, with large unequal subsquamate rudely 

 clathrate ribs ; margin crenulated, orifice small, subrotund, inclin- 

 ing posteriorly ; whitish or greenish. (Ads. & Rve.*) 



China Sea. 



F. excelsa ADS. & RVE. Zool. Samarang, Moll., p. 70, t. 11, f. 5. 

 ? Not F. excelsa Rve., Conch. Icon. 



G. ALTA C. B. Adams. PL 63, figs. 23, 24. 



Shell subconic, high, dingy white, often more or less covered with 

 broad ashy black rays, which may be seen through the shell, with 

 prominent radiating ribs, of which the alternate ones are excessively 

 developed, and intermediate small raised lines ; with many con- 

 centric ridges, which are less prominent than the larger radiating 

 ribs, and more so than the others ; summit nearer to and somewhat 

 inclined towards the anterior extremity ; fissure small, ovate 

 elliptic ; margin pectinated by the radiating ribs. 



The following are the dimensions of a very large and high shell 

 and of another of average size : 



Height '42 inch. ; length "55 inch. ; breadth '41 inch. 



Height -22 inch. ; length '42 inch. ; breadth '29 inch. (Ad.) 



Panama; Mazatlan. 



F. alia C. B. AD. Catal. Panama Sh., pp. 236, 32Q. Glyphis alia 

 CARPENTER, Mazatlan Catal., p. 221. / F. excelsa REEVE, Conch. 

 Icon., f. 113, 1850, not of Adams and Reeve. 



Reeve described under the name jP. excelsa, in the Conchologia 

 Iconica, a shell which seems to be identical with C. B. Adams' alta. 

 It is not the excelsa of Adams and Reeve, described in the Zoology 

 of the Samarang. The description is as follows : 

 14 



