SUB-ORDER B PLATYPODA 471 
Sub-genera: Alipes, Conrad ; Arrhoges, Tessarolax, Helicaulaxz, Gabb ; Ceratosiphon, Gill ; 
Cuphoselenus, Malaptera, Piette ; Pterocerella, Meek ; Dimorphosoma, St. Gardner (Fig. 941) ; 
Lispodesthes, White (Fig. 942). Jura and Cretaceous. 
Family 19. Strombidae. d’Orbigny. 
Shell conical, turreted, or fusiform, with acuminate spire. Apertwre canaliculate ; 
outer lip often expanded, anteriorly with an emargination. 
Operculum horny. Jura to Recent. 













Fic. 944. 
Strombus crassilabrum, Zitt. Gosau- 
Cretaceous 3 St. Gilgen, Austria. 
Although the shells of 
this family are excessively 
variable, the animals them- 
selves exhibit great uni- 
formity of structure. 
Harpagodes, Gill (Fig. 
943). Spire short, body 
whorl very large. Canal long, reflected. Outer margin produced 
in a number of tubular spinous processes, the posteriormost of which 
rests against the spire and extends nearly to the apex. Jura and 
Cretaceous. 
Pterocera, Lam. (Heptadactylus, Klein). Spire short ; canal bent 
sideways. Outer margin wing-like, with tubular spinous processes, 
beneath the most anterior of which is a deep notch. Recent. 
Pterodonta, VOrb.; Thersitea, Coq.; Pereiraea, Crosse. Miocene. 
Strombus, Linn. (Oncoma, Mayer), (Fig. 944). Shell ovoid, 
tuberculose or spinose, solid; spire with several whorls; body 
whorl very large. Aperture elongate, obliquely truncated and 
channelled anteriorly, canaliculate posteriorly. Outer margin 
dilated in wing-like fashion, usually thick, often produced behind, 
sinuate and sometimes channelled in front. Columellar border 
simple, enamelled. Cretaceous to Recent. 
Pugnellus, Conrad ; Cretaceous. Struthiolaria, Lam.; Tertiary Fic. 945. 
and Recent. Seraphs sopitum, 
Seraphs, Montf. (Terebellum, Lam.), (Fig. 945). Shell elongate, ioe ese 
sub-cylindrical ; spire short, summit obtuse. Body whorl very 
large, smooth or striated. Aperture longitudinal, narrow posteriorly, and shghtly 
Fic. 943. 
Harpagodes oceant, Brongt. 
Kimmeridgian ; Lindner Berg, 
near Hannover. 

