180 SYSTEMATIC PALEONTOLOGY 



Bnsycon tuberculatum Conrad, I860, Proc. Acad. Nat. Sci. Phila., voL xiv, p. 561. 

 Buaycon tuberculatum Meek, 1864, Miocene Check List, Smith. Misc. ColL (183), 



p 23. 

 Fulgur tuherculatus Gill, 1867, Amer. Jour. Conch., vol. iii, p. 146. 

 Busycon tuberculatus Conrad, 1868, Amer. Jour. Conch., toI. iii, p. 266, pi. xxiii, 



fig. 1. 



Descripiiou. — " Shell fusiform with spiral striae, ohsolete on the upper 

 part of the IjocI}" whorl; spire elevated, whorls with a carinated line at 

 the angle and compressed prominent tubercles; suture impressed and 

 margined by an obtuse slightly prominent line." Conrad, 1840. 



" Fusiform, with revolving stria ; spire elevated ; angle of the whorl 

 carinated and crowded with prominent tubercles; body whorl ventricose. 



"Allied to F. fusifonnis, but is more ventricose, proportionally shorter. 

 It may readily be distinguished by the carina of the volutions, which 

 is very strongly marked towards the apex." Conrad, 1853. 



This variety, as stated above, is a descendant of the Calvert and 

 Choptank varieties of F. spiniger and survived only during the St. 

 Mary's Miocene. It was never numerically aliundant, nor were its 

 characteristics constant. 



Length, 75 mm.; diameter, 42 mm. 



Occurrence. — St. Maey's Foematiox. St. Mary's Eiver, Cove Point. 



Collections. — Maryland Geological Survey, Philadelphia Academy of 

 Natural Sciences, Cornell University. 



FuLGUE COEOXATIJM Coiirad. 

 Plate XLVI, Figs, la, lb. 



Pyrula canaliculata var. Conrad, 1830, Jour. Acad. Nat. Sci. Phila., vol. vi, 1st ser., 



p. 230. 

 Fulgur coronatus Conrad, 1840 V, Fossils of the Medial Tertiary No. 2, cover. 



(Reprint, 1893, cover of No. 2, p. [80].) 

 Fulgur coronatnm Conrad, 1842, Proc. Nat. Inst., Bull, ii, pp. 183, 187. 

 Fulgur cor onatum Conrad, 1853, Proc. Acad. Nat. Sci. Phila., vol. vi, p. 317. 

 Busycon corouatum Conrad, 1861, Fossils of the Medial Tertiary, No. 4, p. 82, pi. 



xlvi, fig. 1. (Reprint, 1893, p. 82, pi. 46, flg. 1.) 

 Busycon coronatum Conrad, 1863, Proc. Acad. Nat. Sci. Phila., vol. xiv, p. 560. 

 Busycon coronatum Meek, 1864, Miocene Check List, Smith. Misc. Coll. (183), p. 22. 

 Sycotypns coronatus Gill, 1867, Amer. Jour. Conch., vol. iii, p. 149. 

 Sycotypus coronatus Conrad, 1868, Amer. Jour. Conch., vol. iii, p. 267, pi. xxiv, 



fig. 1. 

 Fulgur coronatum Harris, 1893, Amer. Jour. Sci., ser. iii, vol. xiv, pp. 24, 28;- 



