132 
F.. curvirostris. 
F. inconstans. | 
CONCHOLOGY. 
F. pleurotomarius.* 
F. harpularis.* 
F.. cinereus.* 
F. sinistralis. 
F. articulatus. 
F. fluviatilis.* 
_F. decemcostatus.* 
F. bicolor.* 
7%. Genus Pyrula. Pl. XI. 
Animal. 
Sheil. 
Unknown. 
Pyriform on account of the depression of the spire, 
which distinguishes it from the Fusus; the canal conical, very 
long or middling, sometimes a little sloped; aperture oval, rather 
large; the columella edge somewhat excavated, entire and-tren- 
chant ; an operculum. 
seas. 
Pyrula salmo. 
P. carica. 
P. candelabrum. 
P. tuba. 
P. melongena. 
P. ficus. 
P. spirata. 
P. elongata. 
P. bezoar. 
P. angulata. 
P. nodosa. 
P. abbreviata. 
P. deformis. 
P. lineata. 
8. Genus Struthiolaria. 
Animal. 
Shell. 
Twenty-nine living species. 
See Triton, hereafter. 
Ovate ; spire prolonged ; aperture sinuous, terminated 
Found in the Northern and American 
Six fossil. 
Pyrula plicata. 
P. canaliculata. 
P. perversa. 
P. bucephala. 
P. vespertilio. 
P. reticulata. 
P. ficoides. 
P. spirillus. 
P. ternatana. 
P. rapa. 
P. galeodes. 
P. squamosa. 
P. citrina. 
P. neritoidea. 
P. papyracea.* 
ey. 
at the base by a very short, straight canal : columellar edge callous ; 
