178 SYSTEMATIC PALEONTOLOGY 



on the whorls of the spire near the suture; two upper whorls entire; 

 sides above the tubercles flattened, with the revolving lines fine and 

 indistinct; volutions seven; beak produced; labrum striated within." 

 Conrad, 1848. 



This species, which originated and flourished abundantly during the 

 Oligocene, has evidently survived on through the lower and middle 

 Miocene. At the close of the middle (Choptank) Miocene it appar- 

 ently disappeared, leaving three descendants in the upper (St. Mary's) 

 Miocene. These are F. fusiforme, F. tuberculatum and F. fusiforme var. 

 It is possible the F. scalaspira Conrad represents this form. If not it 

 represents another variety of F. spiniger or a transitional form between 

 that species and F. coronatum. 



Length, 80 mm.; diameter, 40 mm. 



Occurrence. — Choptank Foemation. Jones Wharf. Calveet Foe- 

 MATION. Plum Point. 



Collection. — Maryland Geological Survey. 



FULGUE FUSIFOEME Conrad. 

 Plate XLV, Figs. 2, 3a, 3b. 



Fuhjur carica Say, 1824, Jour. Acad. Nat. Sci. Phila., vol. iv, 1st ser., p. 130. 



(Reprint, BulL Amer. Pah, No. 5, 1896, p. 36.) 

 Pyrula carica Morton, 1829, Jour. Acad. Nat. Sci. Phila., vol. vi, 1st ser., p. 118. 

 Pyrula carica Conrad, 1830, Jour. Acad. Nat. Sci. Phila., vol. vi, 1st ser., p. 211. 

 Fulgur fusiformis Conrad, 1840?, Fossils of the Medial Tertiary, No. 2 (cover). 



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

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

 Fulgur fusiformis Conrad, 18.53, Proc. Acad. Nat. Sci. Phila., vol. vi, p. 318. 

 Busycon fusiforme Conrad, 1861, Fossils of tlue Medial Tertiary, No. 4, p. 82, pi. 



xlvi, fig. 3. (Reprint, 1893.) 

 Busycon fusiforme Conrad, 1863, Proc. Acad. Nat. Sci. Phila., vol. xiv, p. .561. 

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

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

 Busycon fusiforme Conrad, 1868, Amer. Jour. Conch., vol. iii, p. 267, pi. xxiii, fig. 4. 



Description. — " Shell fusiform, with spiral striae, obsolete, except on 

 the inferior half of the body whorl, where they are prominent, wrinkled, 

 and alternated in size; spire elevated, whorls with obtuse little promi- 

 nent tubercles at the angle, which is situated near the suture, and is 

 obtuse." " Allied to F. carica." Conrad, 1840, 1853, 1861. 



This species shows great variation in all its characters. The typical 



