﻿PROSOBRANCHIATA. 



345 



Spec. Char. N. Testa minutd, ovato-oblongd, transversa ; spird brevi depressd ; 

 supra convex d, subtus concavd; anfractibus tribus, primis minimis, ultimo maximo,lavigalo, 

 nitido ; aperturd semihnari ; area columellari lata, plana aut subconcavd. 



Diameter, |-th of an inch. 



Localities. Britain : Charlton (S. Wood). 



Prance : Env. de Chalons {Deshayes). 



A small shell in my cabinet, figured as above, seems to correspond with the figure 

 and description given by M. Melleville in some respects, but not quite so in others ; and 

 I have in consequence put a mark of doubt to the name. It differs from the small and 

 young specimens oi globulus {uniplicata, Sow.), a shell abundant in the Woolwich beds, 

 in being more expanded or extended outwardly ; and there is a difference in the left lip 

 or columella which is thicker and not so flat, and is destitute of a tooth on the upper 

 part. It is less elevated in the spire than consobrina and more expanded than jaspidea. 

 Unfortunately I have only met with the one specimen of this shell, which is figured. 



No. 267. Neritina jaspidea?, Deshayes. Tab. XXXIV, fig. 17 a—c. 



Neritina jaspidea, Desk. An. sans Vert, du Bas. de Par., t. iii, p. 20, pi. lxv, figs. 

 14—16, 1858. 



Spec. Char. "N. Testa ovato-oblongd, supra- convex a, subtus concavd; spird brevi, 

 oblusissimd, submarginatd ; anfractibus tribus, primis minimis, ultimo maximo, lavigato, 

 nitido ; lineis fuscis irregularibus, undulatis, plus minusve numerosis ornato, aliquantisper 

 zonolis angusliusculis interruptis ; aperturd obliqud, minima, semilunari ; area columellari 

 lata, plana vel concavd, declivi ; margine columellari acuto, concavo , posterius unidenla/o." 

 — Deshayes. 



Diameter, yth of an inch. 



Localities. Britain : Dulwich {Meyer). 



France: Brimont, Chalons-sur-Vesus, Gueux {Deshayes). 



Some specimens beautifully marked have been obligingly sent to me for examination 

 by Mr. C. Meyer, two of which with very varied markings I have had figured as above 

 and referred them with doubt to jaspidea. Our specimens do not conform strictly to 

 the one given and described under this name by M. Deshayes, but they differ greatly 

 from the little shell which I have called N. vicina, which is much more expanded in its 

 volutions, has a more extended aperture, and appears to be destitute of exterior orna- 

 mentation, though, as before observed, this latter is not a reliable character. The 

 specimens figured much resemble a recent Jamaica form, N. pupa. The prominent 

 tooth, shown by M. Deshayes, is indistinct in the British fossil. 



