204 SYSTEMATIC PALEOInTOLOGY 



Occurrence. — St. Mary's Fokmation. St. ]\Iary's Eiver, Langley's 

 Bluff. Calvert Formation. Plum Point. 



Collections. — Maryland Geological Survey, Johns Hopkins University, 

 Wagner Free Institute of Science, Cornell University. 



Trophon sp. 



A single specimen of Trophon was found at Greensboro which does 

 not belong to either of the afore-described species, but as the specimen is 

 immature it will not be given a name. 



The specimen possesses five whorls. The body whorl has seven varices 

 and has about twelve revolving ribs distributed from the shoulder to the 

 base of the beak. 



Length, 8 mm. ; diameter, 4 mm. 



Occurrence. — Ciioptank Formation. Greensboro. 



Collection. — Maryland Geological Survey. 



Genus SCALASPIRA Conrad. 

 ■ The name Scalaspira was used by Conrad in 1862 and subsequently by 

 Meek in 1864 in their Check Lists. Each time it was used as a sub- 

 genus under Fusus; and neither time was the subgenus defined, Fusus 

 strumosus Conrad was the only species included under it. As this species 

 is surely not a true Fusus and cannot be with certainty assigned to any 

 other genus, the name may be retained for a new genus defined as follows : 

 Shell fusoid, with angular cancellated whorls ; anterior canal long, nar- 

 row; columella bent at the beginning of the canal, and somewhat callous; 

 nucleus depressed, with faint revolving ridges and transverse striations. 



Type Fv^us strumosus Conrad. 



Fischer considers Scalaspira a synonym of Hanetia of Jousseaume 

 which he places as closely related to Urosalpinx, while Tryon and Coss- 

 mann consider it a synonym of Urosalpinx. 



Scalaspira strumosa Conrad. 

 Plate LI, Figs. 11, 12, 13. 



Fusns strumosus Conrad, 18o3, Fossil Shells of the Tertiary, No. 1, p. 18, pi. iii, 

 tig. 4. 



