. The Annals and magazine of natural history; zoology, botany, and geology. Natural history; Zoology; Botany; Geology. 134 Mr. E. A. Smith on Arctic Molliisca. paler streaks here and there ; whorls 5^, very convex, spirally distinctly ridged, the ridges being alternately larger, longitudi- nally rather coarsely striated by the lines of growth, and very obsoletely plicated ; mouth irregularly ovate, large, occupy- ing more than half the entire length of the shell, of the same colour as the exterior, terminating inferiorly in a short, slightly recurved canal ; columella oblique, scarcely arcuate
. The Annals and magazine of natural history; zoology, botany, and geology. Natural history; Zoology; Botany; Geology. 134 Mr. E. A. Smith on Arctic Molliisca. paler streaks here and there ; whorls 5^, very convex, spirally distinctly ridged, the ridges being alternately larger, longitudi- nally rather coarsely striated by the lines of growth, and very obsoletely plicated ; mouth irregularly ovate, large, occupy- ing more than half the entire length of the shell, of the same colour as the exterior, terminating inferiorly in a short, slightly recurved canal ; columella oblique, scarcely arcuated, smooth, shining, whitish towards the base ; epidermis thin, olivaceous, and laminated slightly on the principal distinct incremental lines or raised lirulse ; operculum circularly ovate, with the nucleus rather central. Length 33 millims., diam. 17 ; aperture 19 and 11 wide. Hah, Dobbin Bay, 30 fms. (Hart). The dentition of the animal of this species closely resembles that of Buccinum grosnlatidicum and Nep- tunea anttqua, as represented by Tros- chel's figures in his work ' Das Gebiss der Schnecken,' vol. ii. pi. vi. The above description was already pre- pared under the supposition that the spe- cimen before me was distinct from B. Belckert, when, through the kindness of Dr. Gwyn Jeffreys, I was enabled to compare it with the type of that species. It is less elongated, has a rather shorter spire; and the body-whorl is more ven- - , aaaaa, h tricose. The columella also is less arcuate fv.^(J_7<i^{Li) and more oblique, and the spiral ridges /T^ aaaaa and lines of growth are more pronounced. '^^ ^ The type does not display such regularity in the alternation of large and small trans- verse ridges as the variety. A specimen of this species from Finmark, in the collection of Mr. Jeffreys, very closely re- sembles the shell from Dobbin Bay. Like the rest of the genus this species is subject to great variation. The type specimen is comparatively smooth and without
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