206 SYSTEMATIC PALEONTOLOGY 



The St. Mary's fossil which Conrad referred to cinereus (Fusiis cinereus 

 Conrad, 1830) must from its size have been Buccinofusus parilis, then 

 unnamed by him. There is considerable doubt as to the identity of the 

 Miocene fossils referred by Say and by Meyer to cinereus. 



Length, 38 mm. ; diameter, 40 mm. 



Occurrence. — St. Mary's Formation. St. Mary's Eiver, Cove Point. 

 Choptank Formation. Jones Wharf. 



Collections. — Maryland Geological Survey, Johns Hopkins University, 

 Wagner Free Institute of Science. 



Urosalpinx rusticus (Conrad). 

 Plate LI, Figs. 16, 17. 



Fhsus erraiis Conrad, 1830, Jour. Acad. Nat. Sci. Phila., voL vi, 1st ser. , p. 223, 



pL ix, fig. 2. (Not F. errans Sowerby.) 

 Fusus rusticus Courad, 1830, Jour. Acad. Nat. Sci. Phila., vol. vi, 1st ser., p. 230. 

 Fusus rusticus Conrad, 1832, Fossil Shells of the Tertiary, No. 1, p. 18, pi. iv, flg. 1. 

 Ftisus rusticus Conrad, 1842, Proc. Nat. Inst., Bull, ii, pp. 18.5, 187. 

 Fusus subrusticus Conrad, 1861, Fossils of the Medial Tertiary, No. 4, p. 84, pi. 



xlviii, fig. 5. 

 Neptunea rustica Conrad, 1863, Proc. Acad. Nat. Sci. Phila., vol. xiv, p. .560. 

 Neptunea rustica Meek, 1864, Miocene Check List, Smith. Misc. Coll. (183), p. 22. 

 Siphonalia rustica Conrad, 1869, Amer. Jour. Conch., vol. iv, p. 249. 

 Urosalpinx trossulus Dall, 1890, Trans. Wagner Free Inst. Sci., vol. iii, pt. i, p. 148. 



(In part.) 

 Fusus rusticus Harris, 1893, Amer. Jour. Sci., ser. iii, vol. xlv, p. 30. 

 Streptochetus rusticus Cossmanu, 1901, Essais de Paleoconch. Comp., vol. iv, p. 30, 



pi. iv, fig. 20. 



Description. — "' Shell subfusiform, transversely striated, with short 

 longitudinal ribs or undulations on the large whorl; spire conical, cos- 

 tated; upper part of the whorls concave and plain; right lip toothed 

 within, and plicated on the margin ; beak recurved. The striae in general 

 are alternately larger and smaller." Conrad, 1830. 



Length, 42 mm. ; diameter, 24 mm. 



Occurrence. — St. Mary's Formation. St. Mary's River, Langley's 

 Bluff. 



Collections. — Maryland Geological Survey, Johns Hopkins University, 

 Philadelphia Academy of Xatural Sciences, Cornell University, U. S. 

 National Museum. 



