﻿BIVALVIA. 



129 



Diplodonta Astartea, Ni/st. Crag Moll., vol. ii, p. 146, Tab. XII, fig. 2. 



Localities. Cor. Crag, Sutton. Red Crag, Sutton. Fluvio-marine Crag, 

 Bramerton. 



The shell with this name may be the same as D. trigonula, Bronn, D. apicalis, Phil, 

 although this latter author keeps the two specifically separated, but our Crag fossil seems 

 to have attained to larger proportions. 



The figure in the 'Crag Mollusca' was taken from a Red Crag specimen, but I 

 mentioned (p. 146) that the Coralline Crag form differed somewhat from that of the 

 Red, but not sufficiently so to justify a separation of the two, and I am still of the same 

 opinion. 



The species is given in Dr. Woodward's Norwich Crag List in White's ' Directory ' as 

 from the Fluvio-marine Crag ; and this is confirmed by a specimen of it having recently 

 been obtained by Mr. Harmer from Bramerton. 



Lucinopsis undata, Pennant. Supplement, Tab. IX, fig. 4 a — b. 



Venus undata, Penn. Brit. Zool., ed. iv, vol. iv, p. 95, pi. lv, fig. 51. 



— ixcompta, Phil. En. Moll. Sic, vol. i, p. 44, t. iv, fig. 9. 

 Lucina caduca, Scac. Catal., p. 5, fide Phil. 



Lucinopsis undata, Forb. 8f Hani. Brit. Moll., vol. i, p. 435, pi. xxviii, figs. 1, 2. 

 — — J e ff re y s - Brit. Conch., vol. ii, p. 3G3, 1863. 



Spec. char. L. testa tenui, orbiculato-quadrata, cequilaterali, compressiuscula, Icevi, 

 tenuissime et coneentrice striata, lunula areaque non distinctis. 

 Diam. \ an inch. 



Locality. Chillesford bed, Aldeby. 



Two small specimens have been found by Messrs. Crowfoot and Dowson, one of 

 which is represented in the above figure. 



This species resembles L. Lajonkairii in outline and dental characters, but differs 

 in being quite smooth or with only lines of growth without any radiating striae. 



Lucinopsis Lajonkairii, Pap: Crag Moll., vol. ii, p. 148, Tab. XI, fig. 14 a — c. 



This species is very rare in the Red Crag, from which I have never met with more 

 than one specimen, probably derived from the Cor. Crag, where at one time it was 

 somewhat abundant. 



This may possibly be referred to Venus Candida, Gmel., figured by Gualt., ' Test.,' 

 Tab. 75, fig. l, but my shell does not very well accord with those figured by Homes and 

 Philippi, which are smaller and much more inequilateral. The representation in the 

 'Ency. Method.,' pi. 272, fig. 2 a, b, corresponds with our Crag shell. 



Mr. McAndrew (whose recent death I deeply deplore, and than whom no one has 



