70 LITTORINID.E. 



A. GKAYAXA, Jeffreys. 



Plate LXXI, fig. 3, 4 and (Animiil) Plate H. IT. fig. 6. 



Nerita Synccra hcpalica. Gray, Medical Repository, vol. xv. (1!!'21) p. 239, 



(animal). 

 Limneus Grayanus, Jeffreys, Trans. Linn. Soc. vol. xvi. p. 37(5. 

 Assiminia Grayana, Fleming, Brit. Animals, p. "275. — Berkeley, Zoolog. Jour. 



vol. V. p. 429, (animal), pi. 19, f. 4. — Gray, Manual L. 



and F. W. Shells, p. 86, pi. 11, f. 127. — Brown, lUust. 



Conch. G. B. p. 27, pi. 18, f 3, 4. — Sowerby, Conch. 



Manual, f. 363*. 

 Paludina „ PoTiEZ and Mich. Gal. Douai, Mollusq. vol. i. p. 251, pi. 25, 



f. 23, 24. 



It seems surprising that a shell so locally abundant as 

 this is should not have been noticed by the earlier writers 

 upon British Conchology. It is of an oval-conic shape, 

 but occasionally becomes both broader and more abbre- 

 viated, is tolerably strong, a little translucent, smooth or 

 very nearly so, and of a shining fulvous tint. This colour- 

 ing is either uniform, or so arranged that whilst the space 

 around the axis is of a paler tint than the rest, a broad 

 central band of a more intense hue encircles the body, 

 and is continued as a narrow strip along the bottom of 

 the smaller volutions. Nearly one half of the length 

 occupied by the seven whorls, of which the shell is com- 

 posed, is filled by the body whorl (when viewed from 

 above) ; the rest of the volutions are plano-convex or 

 but very little rounded, simply and regularly shelving, 

 and rather short, their height not being equal to half 

 their breadth. A slight degree of angularity is generally 

 perceptible about the middle of the body-whorl, nearly in 

 a line with the course of the suture : the base is short, 

 and the slope is a little convex. The spire is rather 

 quickly attenuated, and the apex is very small, and 



