1886.] PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 205 



Max. Ion. of shell, 14.25; of last wboii, 11.00; of aperture, 7.00: of 

 operculum, 7.00; max. lat. of shell, 10.00; of aperture, 6.00; of oper- 

 culum, 5.00 "'™; these are dimenslous of the largest specimen. 



S«6/f«t — Labrador's reef, Ungava Bay ; three specimens in the ooze 

 and slime filling the crevices of the rocks; August 5, 1882, L. M. Tur- 

 ner. Collector's number, 238 ; Museum number, 73743. 



Also, Arctic Ocean, iiorth of Bering Strait, in the summer of 1885; 

 three specimens by Captain Healy, of the U. S. K. S. Corwin ; exact local- 

 ity doubtful. 



In the specimen dissected, which was a female, the minute ova were 

 already formed, the general anatomy recalled that of Litorina; the ali- 

 mentary canal near its termiiiation and the ovarian canal were nearly 

 equal in size, the former being much more prominent in Litorina than 

 the latter. The short radula, the sharply-detined spiral keel on the oper- 

 culum, the form of the teeth, the profuse mucus, the character of the shell 

 and epidermis, separate this group sufficiently from Litorina, which 

 seems its nearest ally. It was certainly most unexpected to receive from 

 the well searched Arctic waters a new form of higher rank than a species, 

 and still more singular was the coincidence by which specimens from 

 Labrador and Bering Strait came almost simultaneously to hand. The 

 labels of Captain Healy's collection having become illegible during trans- 

 portation, the exact spot north of Bering Strait where his specimens 

 were collected is uncertain. He dredged at various points from St. Law- 

 rence island north to Icy Cape on both sides of Bering Strait, but not in 

 Kotzebue Sound. The area is within that of the purely Arctic fauna, so 

 the exact spot is of less importance. All the dredgings were in less 

 than 65 fathoms. 



BUCCINID^. 



Chrysodomus spitzbergensis Eeeve. 



Fu8U8 sjnizhei-gensis Reeve, Last of the Arctic Voy., II, p. 395, pi. 32, fig. 6, a — h, 



1855. 

 Fepiunea {Sxpho) terehmlis Gould, Proc. B. S. Nat. Hist., VII, p. 326, 1860. 

 Sipho lividus (Morch) Veriill, Proc. U. S. Nat. Mus., VI, 1883, p. 238, pi. IX, 



fig. 12. 



One imperfect specimen found on the upland near Fort Chirao, Un- 

 gava Bay, where it had doubtless been carried by the ravens, as is their 

 wont. Collector's number, 4441 ; Museum number, 73744. 



The forms indicated by the above synonymy grade into one another 

 and in a large series cannot be discriminated as valid species. Reeve's 

 name has five years' precedence of that given by Dr. Gould, and accord- 

 ing to the latter, was partly founded on the same specimen. It is found 

 from Bering Strait to Spitzbergen, and is rather variable in sculpture 

 and form even in the same locality. 



