96 PLIOCENE MOLLUSCA. 



Var. Schneideri, Verkriizen. Plate VIII, figs. 1,2. 



1885. Buccinum tmdatum, var. Schneideri, Verkriizeu, Nachr. Deutscli. Malak. Gesellscli., vol. xvii 



p. 87. 

 1912. Buccinum undatam, var. Schneideri, Dautzenberg et Fischer, Camp. Scieut. Pr. Monaco 



vol. xxxvii (Mollusques), p. Ill, pi. v, fig. 11. 



Dimensions. — L. 55 mm. B. 32 mm. 



Blstrlhution. — Recent : Vadso. 



Fossil : Waltonian Crag : Little Oakley. 



Bemarhs. — The Oakley shell here represented was recognised by Dr. 03^en 

 as agreeing with Recent specimens under the above name in the Christiania 

 Museum ; there are others like it in the Norman collection at South Kensington 

 which were dredged at Vadso from a depth of 100 fathoms, one of them being also 

 figured. In its spiral sculpture it approaches var. striata, although the ribs are 

 not so prominent. It differs in form from the latter, being more slender and 

 elongate, the body-whorl is not so tumid, the suture is deeper, the shell is some- 

 what fragile, and the upper whorls are faintly though distinctly plicated. MM. 

 Dautzenberg and Fischer recognise it as a distinct variety. It appeal's to be a 

 northern form. 



Var. pulchra, nov. Plate X, fig. 13. 



Varietal Characters. — Shell rather small, thin, ovate ; whorls convex, the last 

 tumid and often varicose, two-thirds the total length; spire short, rapidly diminishing 

 in size ; suture deep ; elegantly ornamented by longitudinal plications, prominent, 

 oblique, and sinuous, and by fine well-marked spiral lines, which on the body- whorl 

 are bifid, with a fine line intervening; mouth ovate; outer lip very thin; canal 

 short, notched, rather narrow. 



Dimensions. — L. 40 mm. B. 25 mm. 



Distribution. — Fossil : Waltonian Crag : Walton-on-Naze, Oakley ; probablj' 

 elsewhere in the Red Crag. Pliocene : Iceland. 



Remarks. — I have several specimens of this variety from the Red Crag, some 

 of them immature ; they differ from the type in size and fragility. Dr. 03^en does 

 not know anything like them from northern seas and suggests I should give them 

 a distinctive name. They seem to separate themselves from other Crag varieties of 

 B. undat'um. There is a specimen from the Pliocene of Iceland in the Morch 

 collection at Copenhagen which appears to be the same as our shell ; it bears the 

 name B. undatum, var. pumilio, but as it does not correspond with the figure of 

 that variety in the unpublished plates above' [referred to, I retain my own name 

 for it. 



