588 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.45. 



crenulate by the external sculpture; throat white, smooth; height 

 of shell 168; of last whorl 134; of aperture and canal 105; maximum 

 diameter 78 mm. Operculum large, dark brown, normal to the genus. 



Dredged at Aniwa Bay, Sakhalm Island, at station 5009, in 25 

 fathoms, mud, bottohi temperature 38° 5 F. 38.5°. U. S. Bureau of 

 Fisheries steamer Albatross. Cat. No. 205371 U.S.N.M. 



Only a smgle adult specimen of this fine species was obtained. 

 It is one of the largest of the genus. Originally described from a 

 very young specimen, it was thought best to give a new diagnosis 

 from the adult. 



TRITONOFUSUS JORDANI, new species. 



Shell of moderate size, of about seven and a half whorls, the nucleus 

 rounded, not swollen but rather large; suture distinct, the whorls 

 moderately rounded; surface covered with a dark orange-brown 

 periostracum, beneath which the shell substance is white; sculpture 

 of incremental lines, not prominent but regular and close set, crossed 

 by numerous fiat spirals with very narrow interspaces, this sculpture 

 covering the whole surface, the spirals being slightly narrower in 

 front of the suture; on the periphery of the last whorl there are 

 about tv/o spirals with their interspace in the width of one millime- 

 ter; aperture less than half the length of the shell; canal wide, short, 

 sharply recurved; outer lip simple, flexuous, expanded, receding 

 behind the periphery and advancing near the suture, connected over 

 the body with the pillar by a thin layer of white callus; pillar short, 

 attenuated in front; throat smooth, bluish white; operculum ovate, 

 with apical nucleus, dark brown. Height of shell 43 ; of last whorl 

 31; of aperture 20; maximum diameter of shell 21 nam. 



Puget Sound, Sucia Island, and Gulf of Georgia in 67 fathoms, 

 sand, bottom temperature 48° 5 F. Also in Bering Sea off the south- 

 east coast of Kamchatka in 96 to 100 fathoms, sand, temperature 

 31° F. to 33° 1 F. Cat. No. 22642, U.S.N.M. 



The specimens are quite uniform, and nearly all have a ferrugi- 

 notis incrustation on the early whorls. The young have a lighter 

 colored, more or less olivaceous periostracum. The suture is not 

 closely appressed and gives the aspect of being minutely channeled, 

 especially on the last whorl. 



It is named after Dr. David Starr Jordan, of Stanford University. 



BOREOTROPHON GORGON, new species. 



Shell elongate, white, of seven whorls, the nucleus small, smooth, 

 rounded, of two whorls; subsequent whorls with a peripheral 

 spinose carina or cord, with two additional cords on the base of the 

 last whorl; last whorl with six, preceding whorl with eight or nine 

 sharp-edged varices, which become prominently spinose where they 

 intersect the cords; interspaces smooth except for incremental 

 lines; aperture ovate, with a raised margin except at the canal; 

 throat white, smooth; operculum muricoid, canal long, slightly 



