NO. 2217. THE GENUS EPITONIUM AND ITS ALLIES— DALL. 479 



reflected; in ascending to the apex of the shell they nearly half 

 encircle it; base rounded, imperforate;' the terminal varix does not 

 touch the body whorl and is buttressed by the anterior ends of the 

 preceding varices. Length, 9; diameter, 4.5 mm. U. S. Nat. Mus. 

 Cat. No. 46213. Range, Gulf of California (Stearns). 



EPITONIUM PAZIANUM, new epecies. 



Shell chalky white, thin, smooth, with seven rounded, almost 

 separated whorls exclusive of the (lost) nucleus; varices nine, thin, 

 sharp, with a spinule at the shoulder, continuous over the suture into 

 which they descend and making nearly half a turn around the spire 

 before reaching the apex; base rounded, imperforate; aperture 

 rounded, the inner anterior margin somewhat produced; the margin 

 nowhere attached to the body whorl. Length, 20 ; diameter, 9 mm. 

 U. S. Nat. Mus. Cat. No. 111208. Range, La Paz, Lower Cali- 

 fornia, in 112 fathoms. 



EPITONIUM HEXAGONUM Sowerby, 1844. 



Has six varices, as its name implies, and this number seems invari- 

 able. The shell is pure white, the smoothness and regularity of its 

 shape are very pleasing and give, together v^^ith its solidity, a special 

 aspect to the species. It ranges from Santa Cruz, California (Button, 

 collector) to Panama. 



EPITONIUM PROPEHEXAGONUM, new species. 



Shell of 10 whorls, livid flesh color with white varices, otherwise 

 closely resembling E. hexagonum in form but larger; rarely with 

 seven varices; first whorl of the nucleus small, smooth, white; second 

 with 12 low rounded varices; subsequent whorls with the normal 

 six continuous over the suture, half encircling the spire, finely striated 

 on the anterior face, a slight angle at the shoulder but much less 

 prominent than in E. hexagonum. Length, 21; diameter, 9.5 mm. 

 U. S. Nat. Mus. Cat. No. 153075. Range, Gulf of CaUfornia and 

 Mazatlan. 



Adult hexagonum measures about 14 mm. in length and 6 in 

 diameter, and is relatively more acute with apparently deeper suture. 

 The varical angle is only fully developed on the later whorls, when it 

 is often spinose. The front of the varices is not striated. 



EPITONIUM EUTAENIUM. new species. 



Shell small, thin, slender, white, acute, with eight whorls, including 

 the blunt smooth nucleus; varices eight, low, narrow, sharp, con- 

 tinuous over the deep suture into which they dip; a slight angle at 

 the shoulder, the front face of the varices smooth; aperture trans- 

 versely oval, the lateral margins shghtly produced. Length, 11; 

 diameter, 4 mm. U. S. Nat. Mus. Cat. No. 201201. Range, Gulf of 

 Cahfomia. 



