CYPRICARDINIA. 
11 
larger anterior wing, and more definite constriction on the right valve; and 
Pterinea elegans, Gold fuss, ^ which is a much shorter shell, with very small 
wings and coarse striations. On the other hand, he considers C. squamifera, 
Phill.,^ as given by Romer,'* to be clearly separated by its transverseness and 
flatness ; and G. alveolaria, (Ehlert,^ by its elegant reticulation and more equal 
valves. He also thinks that four species cited by Tromelin and Lebesconte^ 
from Brbray under the generic name of Grammatomysia probably all belong to his 
species. 
I at first thought that Gypricardia elongata, d'Archiac and de Verneuil,''' which 
Barrois separates from his shell on account of its length and the absence of a 
constriction, might be identical with ours ; but on further examination Mr. 
Roberts and I came to the conclusion that it is certainly distinct. In that shell 
the beak overhangs the front margin, the greatest height is in front, and the 
shell is very much longer. Sandberger,^ indeed, gives two such dissimilar figures 
of it as to raise the question whether they are both one species, and these come 
rather nearer to our form. However, his left valve still has no signs of constric- 
tion ; and his right valve, which shows the crenulations, has an almost median 
umbo, and a very much produced and subacute anterior wing ; and therefore, even 
allowing for specific variability, I think it clearly distinct. D'Orbigny^ changes 
its name to G. suhelongata, as a more recent shell had been previously described 
as G. elongata. 
Modiola bilohata, Miinster,^" while probably belonging to the same genus, is a 
very differently shaped shell. 
3. Cypeicaedinia eeticulata, Phillips, sp. PL I, figs. 11 — 13. 
1841. Aticula(?) eeticulata, Phillips. Pal. Foss., p. 51, pi. xxiii, fig. 88. 
1854. — — Morris. Catal. Brit, Foss., p. 162. 
^ 1853, Sandberger, ' Verst. Ehein. Nassau,' p. 263, pi. xxviii, fig. 5. 
2 1834-40, Goldfuss, ' Petref. Germ.,' p. 136, pi. cxix, figs. 9 a, h. 
3 1850, F. A. Eomer, ' Beitr.,' pt. 1, p. 33, pi. v, figs. 4 a, h. 
* 1877, Barrois, 'Ann. Soc. Greol. Nord.,' vol. iv, p. 88. 
5 1888, CEhlert, ' Bull. Soc. Geol. Fr.,' ser. 3, vol. xvi, p. 660, pi. xv, fig. 2. 
^ 1876, de Tromelin and Lebesconte, ibid., ser. 3, vol. iv, p. 611. 
7 1842, d'Archiac and de Verneuil, ' Greol. Trans.,' ser. 2, vol. vi, pt. 2, p. 374, pi. xxxvi, 
figs. 14, 14 a, h. 
^ 1853, Sandberger, 'Verst. Ehein. Nassau,' p. 261, pi. xxvii, figs. 14, 14 a — c. 
9 1849, d'Orbigny, ' Prodrome,' vol. i, p. 76. 
10 1840, Miinster, ' Beitr.,' pt. 3, p. 57, pi. xi, fig. IS. 
