FUSUS. 
* Destitute of longitudt- 
nal ribs. 
Antiquus, 200. 
Corneus, 200. 
Carinatus, 200. 
Retroversus, 201. 
Norwegicus, 207. 
Turtoni, 208. 
KX 
With 
ribs or rows of tu- 
longitudinal 
bercles. 
Turricula, 201. 
Buchanensis, 202. 
Proximus, 202. 
Costatus, 202. 
Attenuatus, 203, f. 94. 
xlvii 
Nebula, 203, f. 93. 
Rufus, 204. 
Gyrinus, 205. 
Purpureus, 205, f. 95. 
Barvicensis, 206, f. 2. 
Bamfius, 206, f. 96. 
Muricatus, 206, f. 97. 
Fenestratus, 207. 
PYRULA. 
Carica, 208. 
TRICHOTROPIS. 
Umbilicatus, 209, f. 54. 
MUREX. 
Erinaceus, 210. 
APORRHAIS (ROS- 
TELLARIA). 
Pes Pelicani, 211. 
vated longitudinal ribs, the interstices smooth ; spire 
about equal in length to the body-whorl; aperture 
very narrow, outer lip thickened, the emargination at 
the suture. 
0°40...0°12. A few specimens of this rare 
shell are in the cabinet of W. Metcalfe, Esq. who pro- 
cured them on an islet near Guernsey. 
When worn the 
entire base is of a chesnut colour. 
