394 MARINE INVERTEBRATES 



it effectively in from twenty to one hundred feet of water. The spire is 

 high and regular, with seven to eight slightly rounded whorls. The suture 

 is simple, and there are faint revolving grooves. The epider- 

 mis is thick, horn-colored, and sometimes velvety; the lip 

 simple ; and the anterior canal produced. The shell is pure 

 white within. The operculum is corneous, with a subterminal 

 nucleus. The animal is the same as Succinum, but with 

 small irregular specks of black. This shell is found from three 

 to five inches long. 



S. pygnMeus. This species has the same range as that of 

 the species just described, and often occurs associated with 

 the young of the latter. It may be distinguished from S. 

 Stimpsoni by the greater number of whorls, the more promi- 

 nent revolving ridges, and the smaller aperture. The epi- 

 dermis is drab-colored and strongly corrugated, inclined to hirsute. 

 The color of the shell is pure white. Length one inch to one and a half 

 inches. It is found from low-tide mark to very considerable depths. 



GENUS Siphonalia 



S. Jcettettii. Siphonalia is one of the Pacific genera of the Buccinidce, 

 which finds its greatest development in Japanese waters. One of these 

 Japanese species, S. kelkttii, is also found in California. It has the typical 

 animal of the Buccinida, and a fusiform shell white to brownish in color, 

 and three to five inches in length. It is conspicuously marked upon the 

 whorls by a revolving series of large rounded knobs and indistinct 

 revolving grooves. The operculum is corneous, the nucleus subterminal. 

 It is found in shallow water to low-tide mark. (Plate LXXIV.) 



GENUS Tritonidea 



T. tincta. A Floridian species which ranges from Hatteras to the 

 West Indies, and finds its station near low-tide mark, upon coralline 

 rock or rough, stony bottom. It is about one inch in length, is of a 

 brownish horn-color, and has an oval aperture with a crenuiated outer 

 lip and a deep anterior canal. An entering ridge of white enamel at 

 the top of the columellar lip forms, with one of the teeth of the outer 

 lip, a posterior canal. It is sculptured, with revolving ridges and cross- 

 ing longitudinal folds. The color is bluish-white within the shell, touched 

 with yellow about the anterior canal and along the edge of the outer lip. 

 (Plate LXXIV.) 



FAMILY TURBINELLIDJE 



GENUS Fulgur 



Of the two genera of this family which occur in American 

 waters, Fulgur may be taken as the most characteristic mollusk 

 of the American Atlantic fauna; that is to say, Fulgur occurs 

 only on the American east coast. Its range is from Cape Cod to 

 the West Indies. The two Northern species are F. carica and 



