1905.] NATURAL SCIENCES OF PHILADELPHIA. 25 



TURBINELLID^. 

 Turbinella parva Gabb, Proc. Acad. Nat. Sci., 1860, p. 94, pi. 2, f. 3. 

 Tnrbinella subconica Gabb, Proc. Acad. Nat. Sci., 1?60, p 94, pi. 2, f. 6. 



VOLUTID^. 

 Volutoderma delawarensis (Gabb). 



Valuta delawarensis Gabb, Proc. Acad. Nat. Sci., 1861, p. 322. 

 Type and specimen figured by Wliitfield (pi. 10, figs. 5-7). 

 Volutoderma biplicata (Gabb). 



Volutilithes biplicata Gabb, Jour. Acad. Nat. Sci., IV, 2 ser., 300, pi. 48, 

 f. 6, 1860. 



Type of the genus Volutoderma Gabb {Proc. Acad. Nat. Sci., 1876; 

 p. 289). 



Volutoderma abbottii (Gabb). 



Volutilithes abbottii Gabb, Proc. Acad. Nat. Sci., 1860, 94, pi. 2, f. 7. 

 Also the specimen figured by \^^iitfield (pi. 21, figs. 8, 9). 



Volutoderma intermedia Whitfield, Mon. U. S. Geol. 6ur., XVIII, 184, p. 23, figs. 14, 15, 1692. 

 Volutoderma woolmani Whitfield, The Nautilus, VII, pp. 37, 51, pi. 2, figs. 4, 5, 1893. 

 Ptychosyca inornata Gabb, Proc. Acad. Nat. Sci., 1876, p. 295, pi. 17, figs. 2-4. 

 Volutomorpha conradi (Gabb). 



Volutilithes conradi Gabb, Jour. Acad. Nat. Sci., IV, 2 ser., 300, pi. 48, f. 10, 

 1860. 



Also specimen figured by Wliitfield (pi. VII, figs. 4, 5). Type of the 

 genus Voluto77iorpha Gabb {Proc. Acad. Nat. Sci, 1876, p. 290). 



Volutomorpha bella (Gabb). 



Volutilithes bella Gabb, Jour. Acad. Nat. Sci., IV, 300, pi. 48, f. 7, 1860. 

 Described from the "Delaware and Chesapeake Canal"; original 

 label says "N. J." Also the specimen figured by Whitfield (pi. VI, 

 figs. 17, 18). 

 Volutomorpha mucronata (Gabb). 



Voluta mucronata Gabb, Proc. Acad. Nat. Sci., 1861, p. 323. 

 Volutomorpha kanei (Gabb). 



Voluta kanei Gabb, Proc. Acad. Nat. Sci., 1861, p. 323. 

 Volutomorpha gabbi Whitfield, Mon. U. S. Geol. Sur., XVIII. 73, pi. 8, figs. 2, 3, 1892. 

 Rostellites nasutus (Gabb). 



Volutilithes Jiasuta Gabb, Jour. Acad. Nat. Sci., IV, 300, pi. 48, f. 9, 1860. 

 Also the specimen figured by Wliitfield (pi. 11, f. 2). 



Rostellites angulatus Whitfield, Mon. U. S. Geol. Sur., XVIII, 88, pi. 11, figs. 3, 4, 1S92. 



This may prove to be only the adult form of R. riasutus. 



Liopeplum leioderma (Conrad). 



Volutilithes (Athleta) leioderma Conrad, Jour. Acad. Nat. Sci., I^', 292, pi. 46 

 f. 32, 1860. J 



