180 SYSTEMATIC PALEONTOLOGY 



Fulgur canaliculatum (Linne) 

 Plates XLVI, XLVII, XLVIII. 



Murex canaliculatus Linne, 1758, Syst. Nat., p. 753. 



Busycon canaliculatum Holmes, 1859, Post-Pi. Fos. S. C, pp. 66, 67, pi. xi, 



fig. 3. 

 Fulgur canaliculatus Dall, 1889, Bull. U. S. Nat. Mus., No. 37, p. 112, pi. 



lxxiii, fig. 1. 



Description. — " M. testa patulo-caudata, spirse anfractibus supra canali- 

 culo distinctis." Linne, 1758. 



This species is not as massive as F. carica, but is more common. Its 

 thinner shell is not as well adapted to preservation and it is difficult to 

 find perfect specimens. It is apparently a descendant of F. coronatum of 

 the Miocene through the var. rugosum, F. coronatum in torn is connected 

 with F. spiniger by intermediate forms, and is itself a descendant of F. 

 spiniger or of some common ancestor. F. canaliculatum is found in the 

 Pliocene of the Carolinas, in the Pleistocene from New Jersey to South 

 Carolina and in the Eecent from Cape Cod to the Gulf of Mexico. 



Length up to 160 mm.; width up to 90 mm. 



Occurrence. — Talbot Formation. . Wailes Bluff near Cornfield Har- 

 bor, St. Mary's County. 



Collections. — Maryland Geological Survey, Johns Hopkins University, 

 and TJ. S. National Museum. 



Family NASSIDAE. 



Genus NASSA Lamarck. 



Nassa trivitatta Say. 

 Plate XLIX, Figs. 1, 2. 



Nassa trivittata Say, 1822, Jour. Acad. Nat. Sci. Phila., vol. ii, 1st ser., 



p. 231. 

 Buccinum trivittatum Holmes, 1859, Post-Pi. Fos. S. C, p. 72, pi. xii, fig. 2: 

 Nassa trivittata Dall, 1889, Bull. U. S. Nat. Mus., No. 37, p. 116, pi. xlviii, 



fig. 13 and pi. 1, fig. 7. 

 Nassa trivittata Martin, 1904, Md. Geol. Survey, Miocene, p. 196. 



Description. — " Shell conic acute, yellowish-white, cancellate so as to 

 appear granulated, granules prominent, equi-rlistant; ten revolving im- 



