384 THE CANADIAN NATURALIST. [Oct. 



For several of these fossil specimens I am indebted to President 

 Dawson. 



Moerch considers the species to be the ' Buccinum novum 

 groenlandicum ' of Chemnitz, and has adopted the name groen- 

 landicum for it, as already mentioned under the head of B. groen- 

 landicum Hancock. 



Buccinum simplex Midd. 



Tritonium {Buccinum) simplex Middendorff, Sibirische Reise, Zool., i, 

 234. 



As I have never seen a specimen of this unfigured species, which 

 appears to be distinct, I can do no better than quote Midden- 

 dorff' s description, which is as follows : 



" Testa purpureo-fusca, solida, ovato-conica ; anfractibus con- 

 vexis, striolis sequalibus longitudinalibus minutissimis, oculo nudo 

 vix conspicuis, undulatis, confertissime ornatis ; columella dis- 

 tincte voluta, rugositate spirali externe munita ; canali brevi, in- 

 curvo, apice truncato ; epidermide tenui, tenace, fusco-viridescente. 

 Anfract. numer. 6 ad 7." 



Middendorff further remarks that the species is very similar to 

 " Trit. teiiebrosum" (cydneum ?)* in form and color, but is as 

 thick and heavy as perfect specimens of B. undatum ; and that it 

 is especially characterised by the uniformly crowded transverse 

 striae which cannot well be distinguished by the naked eye, and of 

 which there are from forty to ninety on the penultimate whorl. 

 And that the entire want of ciliation on the periostraca, the 

 crooked canal, and the implicated whorls will give us the means 

 of distinguishing it. " The outer lip is thick, and often reflected, 

 with a somewhat expanded margin. The columella and inner lip 

 are entirely analogous to those of Tritonium undatum and tene- 

 broswm." 



The dimensions given are, length sixty-one ; breadth thirty-two 

 millimetres. 



Found at Schantar Island, in the sea of Ochotsk. 



Judging from the description, this shell must be closely allied 

 to the large thick and smooth variety of B. cyaneum. But the 

 transverse striae, which are evidently of the secondary kind, are 



* Middendorff includes two species in his T. teiiebrosum, viz. B. cyaneum 

 and B. ciliatum. * 



