﻿BIVALVIA. 



161 



as the Crag one, I was influenced by M. Deshayes' having united the Eocene fossil with a 

 shell found in the Touraine Beds. There is, I now think, so great a difference between 

 the two that they ought to be specifically separated ; and as Sowerby's name for the Crag 

 shell has priority I so retain it, leaving the Eocene species to find a new one. 



Necera obesa, Love'n. Supplement, Tab. X, fig. 9. 



Neceba obesa, Loven. Ind. Moll. Scand., p. 48, 1846. 

 — cuspid ata, Jeffreys. Brit. Conch., vol. v, p. 191. 



Locality. Coralline Crag, near Orford. 



A single specimen of this species is all that I have seen, which was obtained by Mr. 

 Alfred Bell, and it now belongs to W. Reed, Esq., of York, who has obligingly placed it 

 in my hands for description. Mr. Jeffreys in the Supplement to his ' British Con- 

 chology,' p. 192, considered this specimen obtained by Mr. Bell and Loven' s species 

 obesa as a variety only of N. cuspidata ; but in a paper of his in the ' Ann. and Mag. of 

 Nat. Hist.' for June, 1870, on the "Norwegian Mollusca," Mr. Jeffreys says that his 

 reference of obesa to cuspidata was erroneous, and that he is satisfied that the two species 

 are distinct. Still later, however, in the list to Mr. Prestwich's Coralline Crag paper, 

 he omits obesa as a Crag species. I consider it, however, a good species, and have so 

 inserted it. 



Poromya granulata, Nyst and Westendorf. Crag Moll, vol. ii, p. 268, Tab. XXX, 



fig- 5 a— f. 



I have seen this shell from the Cor. Crag only, and there it is by no means abundant. 

 This species was found by Edward Forbes in the iEgean, and although found on the 

 Scandinavian Coast, I consider it properly a southern form. Mr. Jeffreys figured and 

 described a minute bivalve as Poromya subtriyona, 'Ann. and Mag. Nat. Hist.,' 3rd 

 series, 1858, p. 42, PI. II, fig: 1, but in 'Brit. Conch.,' vol. ii, p. 228, he refers this shell 

 to the young of Kettia cycladia. I am not aware, therefore, of any other species of this 

 genus besides yranidata. 



Panopea Norvegica, Spenyler. Crag Moll., vol. ii, p. 281, Tab. XXIX, fig. 1. 



Localities. Red Crag, Sutton and Butley. Fluvio-marine Crag, Bramerton. 

 Chillesford bed, Chillesford. Middle Glacial, Hopton. Upper Glacial, Bridlington* 



