KO. 2207. WEST AMERICAN MELANELLTD MOLLUSKS—BARTSCn. 305 

 MELANELLA (MELANELLA) MICANS BOREALIS. new subspecies. 



Plate 35, fig. 7. 



From Vancouver north wo have a race of M. micans which is 

 uniformly more slondor than tho race to the south. This may have 

 tho subspocific name apphod to it above. 



Tho typo (Cat. No. 150954, U.S.N.M.) comes from Comox, Van- 

 couver Island. It has 12 whorls and measures — length, 11.3 mm., 

 diameter, 3.3 mm. In addition to this I have seen four specimens: 

 Cat. No. 214039, U.S.N.M. dredged in 13 fathoms, on mud bottom, 

 at St. Paul, Kodiak Island, Alaska; 1, Cat. No. 160084, U.S.N.M. 

 from Kodiak Island; 2, Cat. No. 208774, U.S.N.M. from Alert Bay, 

 British Columbia; 1, Cat. No. 150954, U.S.N.M., from Comox, Van- 

 couver Island, British Columbia; and 1 in Dr. Fred Baker's collection 

 from Departure Bay, British Columbia. 



MELANELLA (MELANELLA) GCHSNEKI, new species. 



Plate 35, fig. 1. 



Shell rather large, almost straight, pohshed, bluish-white. Tho 

 whorls are very slightly rounded; appressed at the summit, which 

 scarcely shows at its junction with the precediTig turns. The basal 

 portion of the preceding whorls show through the substance of the 

 succeeding turns in such a manner as to render this more conspicuous 

 than the suture. Last turn moderately long, well rounded. Aperture 

 very small; posterior angle pinched in, acute, outer lip thick, coming 

 to a sharp edge; inner lip very strong, slightly oblique; the parietal 

 waU covered by a very strong caUus which is reflected over and about 

 the columella and renders the peritreme complete. 



The type and 42 specimens of this species wore coUocted at Banks 

 Bay, Albemarle Island, Galapagos Islands, on and near sea-cucumbers. 

 The type has lost the nucleus and probably the first two post-nuclear 

 turns. The 12 remaining measure — length, 9 mm.; diameter, 3 mm. 

 The type is in the University of California collection. Four of 

 these specimens are in tho collection of the U. S. National Museum, 

 Cat. No. 322282. Two additional specimens, also in the coUoction 

 of the Univei-sity of CaUfomia, came from Sappho Cove, Chatham 

 Island. 



This species in a way recalls the northern Melanella micans Car- 

 penter, but it diifers from it by being stouter and by having a much 

 siiiallor aperture with a remarkable callus, which is absent in tho case 

 of micans, or practically so. 



'(7403— Proc. N. M. vol. 53—17 20 



