SUB-ORDER B 



PLATYPODA 



471 



Sub-genera: Alipes, Conrad; Arrhogcs, Tessarohts, 



fnft/msf/i-int.*, Mii/ti f if>;-ii, Piette ; Fterocerel/ii, Meek ; />/,//, 

 Lispodesthes, White (Fig. 942). Jura and Cretaceous. 



Gabb ; C> j r(itosijihon, <;ill ; 

 ^, St. Canhwr (Fig. 941); 



Family 19. Strombidae. d'Orbigny. 



Shell conical, turreted, or fusiform, with acuminate spire. Aperture canaliculate; 

 outer lip often expanded, anteriorly ivith an emaryination. 

 Operculum W////. .lura ! l!.-n-nt. 



Strombus crassilabrum, Zitt. 

 Cretaceous ; St. Gilgen, Austria. 



Gosau- 



FIG. 943. 



Harpagodes oceani, Bnm^t. 

 Kinimeridgian ; Lindner Berg, 

 near Hannover. 



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, d'Orb. ; 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 

 and Recent. 



Seraphs, Montf. (Terebellum, Lam.), (Fig. 945). Shell elongate, 

 sub-cylindrical ; spire short, summit obtuse. Body whorl very 

 large, smooth or striated. Aperture longitudinal, narrow posteriorly, and slightly 



Fl.i. !. 



Seraphs so pit urn, 



