PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 525 



iioi'uial form was dredged near the same place iu o fatboms; some with 

 few ribs iu 21 fatboms. 



Tbis sbell wben fresh and i)erfect is of a phim color, or dull [)urple, 

 with tine spiral stria?, recalling tbose of Buccimim tenue, and vStrong 

 transverse ribs. The dead and weathered form is nearly white. Tbis 

 is Keeve's Fusus eretacetis. The variety Rayana has no ribs, but is per- 

 fectly smooth except for the hue sculpture which enables its relations 

 to be recognized. It would be taken as a distinct species at first sight. 

 It was dredged at Cape Smythe, and is named in honor of Lieut. P. H. 

 Kay, U. S. A., the commander of the ex])edition. Museum No. 40972. 



Chrysodomus Martensi Kratise. 



This line new species was found on the beach near the station. Mu- 

 seum No. 40970. 



Strombella malleata u. s. 



Tbis shell, which comes nearest to 8. berinyii (Midd.) Dall, is long 

 and slender, the young shell forming several wborls in an almost cylin- 

 drical coil before they begin to enlarge. The adult may reach inches 

 in length. The surface is covered with bne spjral striae and a thin 

 brown epidermis. It diii'ers from 8. heringii in its dark purple color, 

 its few large (generally only five) transverse ribs, between which the 

 space is nearly flat rather than concave, and a sharp carina on the an- 

 terior periphery of the last whorl, on which the suture is laid. The nu- 

 <;lens is large and blunt, the canal short, the form of the mouth v^ariable 

 in different stages and specimens ; the outer lip is thin, the aperture 

 dark purple within ; the last whorl less than half the length of the shell 

 in most cases. It is generally rude and more or less worn, even when 

 living, the cylindrical tip usually broken off, but the polygonal hori- 

 zontal section of the whorls is very characteristic. 



The writer has collected this species at Port Clarence, Cape Lisburne, 

 Point Lay, Icy Cape, and various other localities within the Arctic 

 basin during the last twelve years. One specimen (Museum No. 40979) 

 was found on the beach near Point Barrow. 



Trichotropis (Iphinoe) arctica (Midd.) Dall. 



CanceUaria arctica Midd. Mai. Ross, ii, p. 112, plate ix, figs. 11, 12, 15, 1849. 

 Point Barrow, also Norton Sound. It was originally brought from 

 Bering Strait by Wossnessensky. 



^mauropsis purpurea Dall. 



With X. clausa, but less common, all over the American coast north 

 from Norton Sound. This is A. helicoides Midd., not Johnston. 



lydargarita vorticifera Dall. 



One specimen from beach near Point Barrow. This is much farther 

 north than the species was previously known to range. 



