552 



MOLLUSCA 



PHYLUM VI 



Harpagodes Gill (Fig. 992). Sj^ire sliort, body wliorl very large. Canal long, 

 reflected. Outer niargin produced in a nuniber of tubulär spinous processes, the 

 posteriormost of wliicli rests against the spire and extends 

 nearly to the apex. Jura and Cretaceous. 



Fig. 992, 



Harpagodes oceani Brongt. 

 Kimmeridgian ; Lindner Berg, 

 near Hannover. 



Sirombus crassüahrum Zitt. Gosaii- 

 Cretaceous ; St. Gilgen, Austria. 



Pterocera Lam. {Hepta- 

 dactylus Klein). Spire 

 sliort ; canal beut sideways. 

 Outer margin wing - like, 

 with tubulär spinous pro- 

 cesses, beneath the niost 

 anterior of which is a deep 

 notch. Kecent. 

 Pterodonta d'Orb. ; Thersitea Goq. ; Pereiraea Crosse. Miocene. 

 Stromhus Linn. (Oncoma Mayer) (Fig. 993). Shell ovoid, tuberculose or spinöse, 

 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. 994). Shell elongate, 

 sub-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 truncated anteriorly, sometimes pro- 

 longed in the spire posteriorly by a callosity. Columellar border 

 smooth, straight. Tertiary and Recent. 



Rostellaria Lam. Spire high, whorls smooth. Aperture pro- 

 Seraiihs sopituin ^^^^^ anteriorly in a beak-like canal, and continued posteriorly 

 (Brander). Caicaire as a narrow Channel resting on the spire. Outer margin with 

 near Pari's. ' denticulate processes, notched anteriorly. Late Tertiary and Recent. 



Hippochrenes Montf. {Gyclomops Gabb) (Fig. 995). Like the last, 

 but outer margin expanded in wing-like fashion, and destitute of processes. Upper 

 Crataceous and Eocene. 



