64 BOOK OF SPECIES. 
longitudinal ribs, with a few interrupted rib-like 
varices, crowded in particular parts. W. Sup. 
6. 16. 
DELPHINULA. 
Sub-discoid or conic, umbilicated, solid, with the 
whorls of the spire rough or angular; mouth 
entire, round, sometimes triangular ; the mar- 
gins united, and generally provided with a fringe, 
or thickened. 
D. LaciniATA. Sub-discoid, thick, with 
transverse raised scaly strie, and two or three 
keels on the body-whorl, and one on the spire; 
the former being the basis of great claw-like ra- 
mose curved appendages; colour varying from 
light pink to pinkish black ; the spire is depressed; 
the umbilicus large, deep, and armed with darker 
spiral rows of vaulted scales; diam. 24. W. 31. 
83. 
D. pistortTA. Sub-discoid, thick, reddish 
purple, with transverse sharpish - tuberculated 
furrows; whorls flattish, angulated above, and 
longitudinally plaited; the last disunited, and 
separated. W. 31. 85. 
