552 



MOLLUSCA 



PHYLUM VI 



Harpacjodes Gill (Fig. 992). Spire sliort, Ijody 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. 



Pig. 992. 



Ha'rpagodes oceani Brongt. 

 Kimineridgian ; Lindner Berg, 

 near Hannover. 



Stromlms crassilaJirum Zitt. Gosan- 

 Cretaceous ; St. Gilgen, Austria. 



Pterocera Lam. [Hepta- 

 dactylus Klein). Spire 

 short ; canal bent sideways. 

 Outer margin wing - like, 

 with tubular spinous pro- 

 cesses, beneath the most 

 anterior of which is a deep 

 notch. Kecent. 

 Pterodonta d'Orlj. ; Thersitea Coq. ; Pereiraea Crosse. Miocene. 

 Strombus Linn. (Oncoma Mayer) (Fig. 993). Shell ovoid, tuberculose or spinose, 

 solid ; spire with several whorls ; body Avhorl veiy large. Aperture 

 elongate, obliquely truncated and channelled anteriorly, canaliculate 

 I^osteriorly. Outer margin dilated in wing-like fashion, usually 

 thick, often proditced behind, sinuate and sometimes channelled 

 in front. Columellar liorder simple, enamelled. Cretaceous to 

 Eecent. 



Pugnellus Conrad. Cretaceous. Struthiolaria Lam. Tertiary 

 and Eecent. 



Seraphs Montf (TerebeUum Lam.) (Fig. 994). Shell elongate, 

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

 large, smooth or striated. Aperture longitudinal, narrow pos- 

 teriorly, and slightly dilated anteriorly ; canal short. Outer 

 margin thin, simple, obliquely trimcated anteriorly, sometimes pro- 

 longed in the spire posteriorly by a callosity. Columellar border 

 smooth, straight. Tertiary and Recent. 



Rosfellaria Lam. Spire high, whorls smooth. Aperture jsro- 

 Scrnphs sopitum '^^^^ced anteriorly in a beak -like canal, and continued posteriorly 

 (Brander). Caicaire as a narrow channel resting on the spire. Oitter margin with 

 near Paris. ° ' denticulate jirocesses, notched anteriorly. Late Tertiary and Recent. 

 Hi^ypochrenes Montf. {Gyclomops Gabb) (Fig. 995). Like the last. 

 ))ut outer margin exj^anded in wing-like fashion, and destitute of processes. Uijper 

 Crgtaceous and Eocene. 



Fin. 994. 



