1865.] REVIEW OF THE NORTHERN BUCCINUMS. 369 



it was long since found by that indefatigable observer and most 

 accurate describer, Otho Fabricius. I have a specimen from Spits- 

 bergen, and it has been reported by Gray as having been collected 

 at the mouth of the McKenzie River by Dr. Richardson. Midden- 

 dorff found it in the Sea of Ochotsk. It is thus circumpolar in its 

 distribution. It has been well named in view of its thoroughly 

 arctic habitat. On the Atlantic Ocean it has never, as far as we 

 are aware, been found south of Greenland on the American shores, 

 nor south of Spitzbergen on those of Europe. In the North Pacific 

 it reaches a notably larger size than in the North Atlantic ; and 

 Behring's Straits may be considered as its geographical head- 

 quarters, or " centre of distribution." I am not aware that it has 

 been found in any pleistocene deposit. 



It may be distinguished from the other carinated species with 

 flattened spiral ridges by the shape of the aperture, which does not 

 encroach upon the body-whorl within. It is less elongated and 

 more deeply grooved than B. Donovani. 



Chemnitz' figure in the " Schriften " of the Berlin Society, above 

 cited, is by far the best that has as yet been published of this 

 species, and corresponds exactly with 0. Fabricius' description. 

 Kiener's figure represents the two-keeled variety. 



Buccinum Donovani Gray. 



Buccinum glaciate Donovan, British Shells, v (1799), pi. cliv. Gray 

 Appendix to Parry's 1st. Voy. (1824), 240. Brown, Illust. Conch. Gr. 

 Britain (182 7), xlix, 12, 13 (not of Linnaeus). 



Buccinum Donovani Gray, Zool. of Beechey's Voy. (1839), 128. Gould 

 Inv. Mass. (1841), 304, fig. 208. DeKay, New York Fauna,, v (1843), 

 134, pi. xxxv, 336 : Reeve, Conch. Icon, iii (1846), Buc, i, 2. 



Buccinum tubulosum Reeve, Conch. Icon, iii (1847), Buc, xiii, 105. 



Tritonium Donovani Moerch, in Rink's ' Groenland ' Tillaeg (1857) 

 Aftryk 84. 



Shell elongated, thick ; spire long and tapering ; whorls 8 or 9, 

 convex, with an obtuse carina at the middle of the body-whorl 

 sometimes obsolete. This carina commences at the upper angle of the 

 aperture. Longitudinal folds about thirteen, most distinct near the 

 sutures, and often obsolete on the body-whorl except at the suture. 

 Primary spiral grooves of the same type as those of B. polar e but 

 broader, and always double or triple in fresh and good examples. 

 The primary ridges are less flattened than in the other species of 



Vol. II. t No. 5. 



