114 PLIOCENE MOI.LUSCA. 



DUfribution. — Recent : north-eastern coasts of North America, Newfoundland ; 

 Greenland, Spitzbergen, Franz Joseph Land. 



Fossil : Waltonian Crag : Walton -on-Naze. Newbournian : AVal- 

 dringfield. Biitleyan : Butley. 



Pliocene : Iceland. Scaldisien : Antwerp. Pleistocene of Canada : Riviere du 

 Loup. 



Remarl-s. — There appears to be considerable difference of opinion as to what 

 the American 7i. Totteuli really is; it does not seem to have been figured until 

 1883. Mr. E. A. Smith has shown me a specimen in the British Museum, without 

 plications, ornamented with very fine spiral lines, which Dr. Dall considered the 

 typical form of this species ; it approaches the shell I received from Dr. Spai're 

 Schneider as B. meridionale (PI. IX, fig. 2). Sir J. W. Dawson says, moreover, 

 that B. Tottenii is characterised by the absence of longitudinal folds {oii. cif., 

 p. 396). 



On the other hand Mr. Friele identifies the latter with B. tpvrx novae, a strongly 

 sculptured form, while MM. Dautzenberg and Fischer, our latest authorities on 

 the subject, have figured in their recent work as B. Tottenii some shells having 

 bold and well-marked sculpture, both longitudinal and transverse. They remark 

 that the figures given by Dr. Kobelt in the Conch. Cab. {op. cit.) agree perfectly 

 with Stimpson's original description of this species.^ There is a somewhat 

 similar specimen from Walton in the Jermyn St. Museum, and another here 

 figured, from Butley, in the Sedgwick Museum at Cambridge (PL X, fig. G), 

 which approach those represented by MM. Dautzenberg and Fischer, and appear 

 to belong to the present species. 



In the Morch collection from the Iceland Crag at Copenhagen there are 

 fossils under the present name, somewhat similar but smaller in size and with finer 

 sculpture (fig. 7), which I propose to call var. islandica ; one of these I have 

 figured with another from Waldringfield (fig. 8), which seems to be the same. 



There is a note in Canon Norman's writing at the British Museum expressing 

 the opinion that most of Verkriizen's specimens of B. meridionale and B. 

 inexhaustmn might be regarded as varieties of B. Tottenii, but in the Crag these 

 forms appear to have been distinct. Following Prof. Kobelt and MM. Dautzenberg 

 and Fischer as to B. Tottenii, and Dr. Sparre Schneider as to the others, I retain 

 the latter name for the specimens now figured from Iceland, Walton, and Butley. 

 They differ materially from Verkriizen's type forms of B. meridionale and B. 

 inexhaustum. 



The shell I recognise as B. Tottenii seems to be a North American and Arctic 

 species which ranges to Spitzbergen and Franz Joseph Land, but is unknown 

 from Scandinavian seas. 



The question of the relation of the various Crag Buccinums to each other and 



1 Students sliould refer to these figures, with which my PL X, fig. 6, very nearly agrees. 



