NO. 2295. NmV NORTH PACIFIC MOLLUSKS—DALL. 307 



tlireo subsequent whorls; spire low, covered with a thin coating of 

 enamel which partly obscures the sutures; last whorl plump, v/ith 

 a tinge of yellow outside the varLx and around the siphonal fasciole; 

 outer lip with a narrow external thickening, internally quite smooth; 

 inner lip with four prominent thin plaits with wider interspaces, 

 counting the elevated edge of the pillar; height of shell, 27; of last 

 whorl, 25; diameter, 17 mm. U. S. Nat. Mus. Cat. No. 101068. 



Type-localiiy. — West Mexico, received from Prof. Alfred Duges. 

 This belongs to the group of M. curia Sowerby, but is a much thin- 

 ner and more elegant shell. 



MARGINELLA POLITIJLA (COOPER MS.), new s.jeciee. 



Shell minute, translucent white, of about two and a lialf whorls, 

 the spire evident but covered with transparent enamel; it is widest 

 posteriorly but docs not attenuate rapidly enough to become pyri- 

 form; the aperture is nearly as long as the shell, the outer lip thick- 

 ened, internally smooth, nearly straight; inner lip polished with 

 three oblique plaits; height of shell, 3; maximum diameter, 1.5 mm, 

 U. S. Nat. Mus. Cat. No. 23240. 



Type-loculiiy. — Catalina Island, California, in 30 fathoms, collected 

 by J. G. Cooper. 



The differences which separate these small MarginelUdae are not 

 great but appear to be constant enough to take specific rank. The 

 present species has long been known among collectors by Doctor 

 Cooper's manuscript name, but so far as I have discovered has 

 never been described, although it was collected by Colonel Jewett 

 in 1849. 



MARGINELLA EREMIIS, new species. 



Shell small, white, smooth, solid, v.dth about four whorls, the 

 nucleus, as in most abyssal species of the genus, being subglobular 

 and relatively large; suture appressed, rather obscure, general form 

 of the shell not unlike that of M, yucaiecana of the West Indies, but 

 more slender and much smaller; outer lip thickened, especially near 

 the posterior commissure, near which is a single denticle on the inner 

 side of the lip; in front of this a few obscure low nodulations; inner 

 lip with four subequal plaits, including that at the edge of the pillar ; 

 height of shell, 5 ; of last whorl, 4 ; diameter, 2.4 mm. U. S. Nat. Mus. 

 Cat. No. 207622. 



Type-localiiy. — Near the Galapagos Islands, at U. S. Fish Commis- 

 sion station 2808, in 634 fathoms, sand; bottom temperature 39.9° F. 



MARGINELLA ANTICLEA, new species. 



Shell minute, smooth, evenly spindle shaped, glistening milk v/hite, 

 with about four whorls, including a moderately large blunt nucleus; 

 suture obscured by a thin coat of enamel; aperture narrow, outer lip 



