50 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 56. 



surface; axial sculpture of almost microscopic, even, regular incre- 

 mental lines, and on the third whorl about 16 small sharp ribs cross- 

 ing the whorl, with wider interspaces and becoming obsolete on the 

 fourth whorl ; anal sulcus shallow, aperture simple, inner lip erased, 

 pillar attenuated in front, canal short, straight. Height of shell, 15 ; 

 of last whorl, 11 ; diameter, 6 mm. Cat. No. 214207, U.S.N.M. 



/j>(y./,^g._Chernoffski Harbor, Unalaska Island, Alaska, in lOD 

 fathoms. 



This species is remarkably distinct from most of the others de- 

 scribed in this paper. Only one specimen was obtained. The oper- 

 culum is shorter and broader than in most of the Loras. 



LORA RUGULATA Troschel. 



Plate 13, fig. 6. 



Bela rugitlata (Moller MS.) Troschel, Geb. der Schnecken, 1866, vol. 2, 

 p. 44, pi. 4, fig. 6.— G. O. Sabs, Moll. reg. Arct. Norv., p. 230, pi. 23, 

 fig. 6. 187S.— Feiele, North Atlantic Exp., vol. 2, p. 3, pi. 7, figs. 1-7; 

 pi. 9, figs. 1-12, 1886. 

 Range. — Bering Sea, from Plover Bay to the Aleutians and Kam- 

 chatka and south to Port Althorp, Alaska, in 16 to 69 fathoms. North 

 xVtlantic, Spitsbergen, Northern Norway, with several varieties. 

 Friele unites w^ith it L. assimiUs G. O. Sars, and L. gouldii Verrill. 

 The figured specimen is Cat. No. 222298, U.S.N.M. 



LORA COLPOICA, new species. 



Plate IG, fig. 2. 



Shell resembling L. tenuisshmu in sculpture, but shorter, much 

 more distinctly shouldered, and subangulate at the shoulder, with 

 traces of axial sculpture carried on to the last whorl, but no distinct 

 ribs on the early whorls as in that species. Height of shell, 11 : of 

 last whorl, 8.3; diameter, 6 mm. Cat. No. 214193, U.S.N.M. 



Range. — Tillamook Bay, Oregon, in 786 fathoms, U. S. Bureau of 

 Fisheries Steamer Alhoiross. 



Subfamily MA>fGiLiiNAE. 



PLEUROTOMELLA HERMINEA, new species. 

 Plate 3, fig. 6. 



Shell of moderate size, gray with brown apex; nucleus eroded; 

 with a total of eight whorls; suture distinct, preceded by an obscure 

 thickened margin, not appressed ; whorls descending flatly from the 

 suture to the shoulder; axial sculpture of (on the last whorl 10 or 

 11) short, protractively oblique rounded ribs, extending on the spire 

 from the shoulder to the succeeding suture, but on the last whorl 

 not over the base ; and obscure increinental lines arcuate on the anal 

 fasciole; spiral sculpture on the spire of three or more threads, with 



