MARYLAND GEOLOGICAL SURVEY 181 



Description. — " Shell fusiform, ventricose, with crowded fine spiral 

 wrinkles; spire short; whorls flattened above, and having elevated com- 

 pressed tubercles or spines on the angle, which is somewhat salient; 

 suture canaliculate and margined by an obtuse earinated line.'' Con- 

 rad, 1840? 



"Very distinct from the recent canalicidatum, being less ventricose 

 and having prominent tubercles in ail stages of growth." Conrad, 1853. 



The species as here restricted is characterized by having distant, 

 elevated tubercles and fine, revolving lines. It is sometimes difficult 

 to separate the following variety and it is not essential that it should 

 be done. 



Length, 130 mm.; diameter, 75 mm. 



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

 Point (?). 



Collections. — Maryland Geological Survey, Johns Hopkins University, 

 U. S. National Museum, Philadelphia Academy of Natural Sciences, 

 Cornell University. 



FULGUR CORONATUM YAR. RUGOSUM Conrad. 



Plate XLVI, Figs. 2a, 2b. 



FuUjur caiialicidatun var. Say, 1S34, Jour. Acad. Nat. Sci. Phila., vol. iv, 1st ser., 



p. 129. (Reprint, BulL Amer. Pal., No. 5, 1896.) 

 Pyrula canaliculata Morton, 1829, -Jour. Acad. Nat. Sci. Pbila., vol. vi, 1st ser., 



p. 118. 

 Fulgur canal iculatns Conrad, 1842, Proc. Nat. Inst., Bull, ii, p. 187. 

 Fulgur rngosus Conrad, 1843, Proc. Acad. Nat. Sci. Phila., vol. i, p. .307. 

 Fulgur rugosus Conrad, 1853, Proc. Acad. Nat. Sci. Phila., vol. vi, p. 317. (In 



part.) 

 Fulgur canaliculatuiii Lyell, 185.5, Manual of Geology, p. 182, fig. 164. 

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



xlvi, fig. 4. (Reprint, 1893.) 

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

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

 Sycotypus rugosus Gill, 1867, Amer. Jour. Conch., vol. iii, p. 149. 

 Sycotypus rugosus Conrad, 1868, Amer. Jour. Conch., vol. iii, p. 267, pi. xxiv, tig. 24. 



Description. — " Pyriform, with rather coarse rugose revolving lines, 

 disposed to alternate in size, and very distinct numerous lines of 

 growth; whorls scalariform, with a tuberculated carina, the margin of 

 which presents a waved outline, the tubercles being obtuse; spire 



