188 SYSTEMATIC PALEONTOLOGY 



PiSANLA. (Celatoconus) protractus (Conracl). 

 Plate XL VIII, Figs. 3a, 3b, 4. 



Buccinum protractnm Conrad, 1843, Proc. Acad. Nat. Sci. Phila., vol. i, p. 308. 

 Celatoconus protractus Conrad, 1863, Proc. Acad. Nat. Sci. Phila., vol. xiv, p. 566. 

 Celatoconus protractus Meek, 1864, Miocene Check List, Smith. Misc. Coll. (183), 



p. 17. 

 Cielatoconus protractus Conrad, 1868, Amer. Jour. Conch., vol. iii, p. 267, pi. xx, 



tig. 6. 

 Pisania {Celatoconus) protractus Dall, 1893, Trans. Wagner Free Inst. Sci., vol. iiv, 



pt. ii, p. 235. 

 Metula {Celatoconus) protracta Cossmann, 1901, Essais de Paleoconch. Comp., vol. ii, 



p. 166. 



Description. — " Subfusiform, elevated ; with robust flattened spiral 

 ribs about as wide as the interstices, both ribs and furrows crossed by 

 distinct prominent longitudinal lines; aperture long and elliptical; 

 labrum with short, submarginal prominent lines; beak slightly recurved. 

 Length, one inch and a third." Conrad, 1843. 



Conrad's description is fully adequate for the recognition of the species 

 as there is nothing in the American Tertiary even generically resembling 

 it except Celatocomis mix Dall from the Miocene of ISTorth Carolina. 



There is a slight tendency for the revolving ridges to become alternat- 

 ing in size on the later whorls ; the labrum is always denticulate, and the 

 shell is generally less elongated than Conrad's figure indicates. 



Length, 35 mm.; diameter, 15 mm. 



Occurrence. — Calvert Formation. Plum Point. 



Collections. — Maryland Geological Survey, Philadelphia Academy of 

 ISTatural Sciences, U. S. National Museum. 



Genus PTYCHOSALPINX Gill. 



Ptychosalpinx altilis (Conrad). 



Plate XLVIII, Fig. 5. 



Buccinum altlle Conrad, 1832, Fossil Shells of the Tertiary, No. 1, p. 19, pi. iv, 



fig. 6. 

 Ptychosalpivx altilis Dall, 1892, Trans. Wagner Free Inst. Sci., vol. iii, pt. ii, p. 237. 

 Cominella {Pti/chosalpinx) altilis Cossmann, 1901, Essais de Paleoconch. Comp., vol. 



iv, p. 150, pi. vi, tig. 19. 



Description. — " Subovate, with numerous longitudinal undulations and 

 obtuse spiral strise; body whorl rather ventricose; spire conical; apex 

 obtuse." Conrad, 1S32. 



