214 GLYPHIS. 



ately ribbed, ribs rather distant, muricated ; dorsal aperture small, 

 elliptical, its internal edge broad. Length 1*1, breadth 08 inches. 



(Sowb.) 



St. Vincent. 



F. snbrostrata Gray in Sowb., Conchol. Illustr. p. 6, f. 35. — ? F. 

 subrostrata "Guild.," Sowb. 2d, Thes., p. 192. 

 The original description and figure are given. 



G. aspera Eschscholtz. PI. 36, figs. 28, 29, 30. 



Shell ovate, narrower in front, conical, the slopes nearly straight 

 or a little convex behind the middle. Sculptured with numerous 

 radiating riblets, of which 30-34 are larger, the intervals between 

 them bearing about three smaller ones ; the whole decussated by 

 close elevated concentric lira?, which are more or less scale-like and 

 imbricating. 



Color soiled whitish, with numerous wide blackish rays. Inside 

 white, hole-callus white, very abruptly truncated behind ; margin 

 deeply and sharply crenulated. Perforation short-oval, nearly cir- 

 cular, in front of the middle. Length 56, width 40, alt. 18 mill. 



Sitka to Monterey Bay, Cal. 



Fissurella aspera Eschscholtz, Zool. Atlas, pt. 5 (edit. Rathke), 

 1833, p. 21, t. 23, f. 5. — Glyphis aspera of American authors. — F. 

 lincolni (Gray) in Sowb., Conchol. Illustr. p. 7, f. 14. — Reeve, 

 Conch. Icon, f- 62.— Sowb., Thes., p. 198, f. 133.— F. cratitia Gould, 

 Proc. Bost. Soc. N. H, ii, p. 155, 1846 ; U. S. Expl. Exped. Sh. p. 

 367, f. 471.— F. aspera Sowb., P. Z. S. 1834, p. 127 ; Conch. Illustr. 

 f. 46.— Reeve, Conch. Icon. f. 30.— Sowb. 2d, Thes., p. 198, f. 125. 



This is the largest of the West Coast species, in fact the largest 

 of the genus, although occasional specimens of G. italica attain 

 almost the same size. G. italica has a much larger key-hole-shaped 

 perforation. The original figures of Gould's F. cratitia are given 

 on pi. 42, figs. 60, 61. It is a broken, worn specimen. 



A more doubtful synonym is F. aspera Sowerby. The figure of 

 it is given on pi. 30, fig. 6. The original description is as follows : 

 " Shell oval, rather high, sharply sculptured, longer behind ; ashen 

 inside, the margin white, crenulated ; outside with numerous radi- 

 ating riblets, muricately decussated; dorsal aperture circular, situ- 

 ated in front of the elevated vertex. Habitat, Pacosmayo, Peru." 

 If this prove a good species the name must be changed. 



