220 SYSTEMATIC PALEONTOLOGY 



Wharf. The specimens from St. Mary's Eiver are elongate and may 

 belong to a distinct variety or species. 



Length, 3.5 mm. ; diameter, 1.5 mm. 



Occurrence. — St. Mary's Formation. St, Mary's Eiver. Cpioptank 

 Formation. Jones Wharf, Governor Eun. 



Collections. — Maryland Geological Survey, Wagner Free Institute of 

 Science. 



Subgenus CHRYSALLIDA Carpenter. 



Odostomia (Chrysallida) melanoides (Conrad). 

 Plate LIV, Fig. 1. 



Acteon melanoides Conrad, 1830, Jour. Acad. Nat. Sci. Phila., vol. vi, 1st ser., pp. 



207, 236, pi. ix, fig. 19. 

 Odostomia (jranvlatus Holmes, 1859, Post-Pleiocene Fossils of South Carolina, 



p. 86, pi. xiii, figs. 11, 11a, lib. Not Acteon grannlatus H. C. Lea. 

 ActoBon melanoides Conrad, 1863, Proc. Acad. Nat. Sci. Phila., vol. xiv, p. 570. 

 Actceon melanoides Meek, 1864, Miocene Check List, Smith. Misc. Coll. (183), p. 13. 



Description. — " Shell conical, with about six volutions, strongly stri- 

 ated transversely; the stria are three or four in number on the upper 

 whorls, and the last has about eight; the aperture is ovate, with a fold 

 in the centre." Conrad, 1830. 



Shell small, conical, six-whorled ; whorls of the spire with four equally 

 distinct, raised, revolving ribs and with numerous (about 30) equally 

 spaced and equally prominent longitudinal ribs which granulate the 

 revolving ribs at their intersection, and finer intermediate longitudinal 

 striae; base of the body whorl with about eight additional revolving ribs 

 which are not crossed by the more prominent longitudinal ones of the 

 spire, but between which the finer strise are very distinct; mouth elon- 

 gate ; fold near the upper end of the columella, prominent. 



This species is most closely related to PyramideUa {Chrysallida) 

 granulata (H. G. Lea), of which a figure is here given (Plate LIV, 

 Fig. 2), and from which it differs only in being much less elongate. 



Length, 3.5 mm. ; diameter, 1.5 mm. 



Occurrence. — St. Marys Formation ( ?). St. Mary's Eiver. 



Collection. — Cornell University. 



