110 PLIOCENE MOLLUSCA. 



Specific Characters. — Shell solid, strong, ovate, of moderate size ; whorls 6, 

 convex, regularly diminishing-, the last mnch the largest, three-fourths the total 

 length ; ornamented by well-marked, fine, but rough and wavy spiral ridges and 

 by numerous lines of growth which may be seen with the aid of a lens ; longitudinal 

 plications wanting or faint and confined to the upper whorls; suture distinct; 

 mouth oval, angulate, with a small well-marked sinus above ; oviter lip regularl}^ 

 curved; inner lip forming a glaze on the pillar; canal short, wide. 



Dimensions. — L. 45 — (30 mm. B. 28 — 36 mm. 



Bistrihvfion. — Recent: Grand Banks of Newfoundland. 



Fossil : Coralline Crag : Boyton. Waltonian : Walton-on-Naze, 

 Little Oakley. Probably elsewhere in the Red Crag. 



Pliocene of Iceland. 



Remarls. — The grand and very distinct shell I have given under the above 

 name (PI. X, fig. 1) was sent me by Dr. Sparre Schneider as a typical example 

 of the Recent form B. inexhaustmn, another of Verkriizen's Newfoundland 

 species : it agrees with those of the Norman collection in the British Museum, and 

 apparently with some figured by Prof. Kobelt {op. cit., figs. 4, 5) as B. ventricosum.^ 



I have found at Oakley a fair number of specimens, most of them unfortunately 

 broken or fragmentary, which correspond more or less nearly with Dr. Sparre 

 Schneider's, having the rough transverse sculpture characteristic of this species, 

 the only difference being that the spiral lines are coarser than in the Newfoundland 

 shells ; this is specially so in a perfect example from Boyton in the York Museum 

 (fig. 3). 



Among the Iceland fossils in the Morch collection at Copenhagen {pp. cit.), 

 there is one which may possibly be of the same species. 



Although the nomenclature of Verkriizen's Buccinums has not been generally 

 accepted by conchologists, perhaps because they have not been adequately 

 described or figured, the remarkable similarity that exists between them and some 

 of our Crag fossils leads me to think they deserve recognition. I do not know 

 any of the recognised species of this group to which the Crag forms here described 

 can be so conveniently referred. 



Buccinum elongatum, Verkriizen. Plate VIII, figs. 7, 8. 



1881. Buccinum eZowj/o<?«H, Verkriizen, Jalirb. Deutscli. Malalc. Gesellscli.,vol. viii, p. 90, pi. iv, figs. 3, 4. 

 1883. Buccinum elongatum, Kobelt, Martini uud Chemnitz, Conch. Cab., ed. 2, vol. iii (Buccinum), 



p. 68, pi. Ixxxvii, fig. 1. 

 1899. Buccinum Amalix, var. elongata, Posselt, Medd. om Grronl., vol. xxiii, p. 198. 

 1912. Buccinum Donovani, var. elongata, Dautzeuberg et Fischer, Camp. Scient. Pr. Monaco, vol. 



xxxvii (Mollusques), p. 125, pi. vii, fig. 12. 



^ Another of Kobelt's specimens under this name (fig. 6), which is that originally figured by 

 Kioner (Coq. viv., Buccinum, pi. iii, fig. 7), afterwards copied by Reeve and by Tryon, seems to me a 

 different species. 



