﻿BIVALVIA. 



145 



This Kelsey Hill shell has, like the shells of that deposit in general, a very recent 

 aspect, appearing to have retained much of its animal matter. There are vestiges of a 

 finely crenulated margin which it once possessed, but the specimen has been slightly 

 waterworn. I have not met with it from any older deposit in East Anglia, although the 

 name of Venus gallina is in the list of shells from Harwich by Mr. Webster before 

 spoken of. As this reference of Mr. Webster's has so long remained unconfirmed 

 he possibly mistook for the present species some specimens of V. imbricata. 



Tapes pullastra, Montague. Supplement, Tab. IX, fig. 1 a — b. 

 Venus pullastra, Mont. Test. Brit., p. 125. 



Tapes — Forb. and Hani. Brit. Moll., vol. i, p. 382, pi. xxv, fig. 23. 

 — — Jeffreys. Brit. Conch., vol. ii, p. 355, pi. xxxix, fig. 6. 



Localities. Red Crag, Walton ? Waldringfield. Middle Glacial, Hopton and 

 Billockby ? 



The smaller figure represents a perfect specimen (now in the Brit. Mus.) obtained by 

 Mr. Charlesworth from Waldringfield ; this is located in a mass of indurated clay. The 

 larger specimen, fig. 1 a, was found by myself at Walton, and, I think, belongs to the same 

 species, but the outer surface is gone, either by decortication or abrasion, so that I am not 

 able to tell from its form whether it belongs to this species or to decussatus. I have also 

 found an imperfect specimen in the Cor. Crag (almost a facsimile of the specimen figured 

 1 a) with the exterior surface removed. The hinges of either this species or of virgineus 

 (or probably of both) are abundant in the Middle Glacial sand of Billockby and Hopton. 



Tapes aureus, Gmel. Crag Moll., vol. ii, p. 202, Tab. XX, fig. 2. 

 Locality. Fluvio-marine Crag, Bramerton. 



This species is, I am informed, abundant near Norwich, but I have not seen it 

 from either the Coralline or the Red Crag. It is, therefore, one of the two or three 

 species occurring in the Fluvio-marine Crag that, having regard to the conditions of the 

 Red Crag deposit, we should have expected to have occurred also in that Crag, on the 

 assumption of its being coeval with the Fluvio-marine. 



Tapes decussatus, Linn. Supplement, Tab. X, fig. 4. 



Venus decussata, Linn. Syst. Natur., p. 1135. 



Localities. Post Glacial, Nar Brickearth, Pentney and Bilney. 



The specimen figured is from the late Mr*. Rose's Nar Brickearth collection, and this 



