224 CRETACEOUS LAMELLIBRANCHIA. 
Non 1840. Panopa curarres, A. Goldfuss. Petref. Germ., vol. ii, p. 274, pl. cli, 
fig, 7 (P. Goldfussi, VOrbigny, 
1850). 
—— — pLIcaTA, Goldfuss. Ibid., p. 274, pl. elviii, fig. 5. 
— 1845. — curRGITIS, A. d’Orbigny. Pal. Frang. Terr. Crét., vol. iii, p. 345, 
pl. ceclxi, figs. 1, 2. 
—— 846; — —- A. H. Reuss. Die Verstein. der bohm. Kreideformat., 
pt, ps L7, ply xxxvi, dig... 
— 1847. — puicaTa, J. Miller. Petref. der Aachen. Kreidef., pt. 1, p. 28 
(Glycimeris Geinitzi, Holzapfel). 
-— 1873. — curGITIs, H. B. Geinitz. Das Elbthalgeb. in Sachsen (Paleonto- 
graphica, vol. xx, pt. 2), p. 68, pl. xix, 
HOS Le. 
— 1876. = — D. Brauns. Zeitschr. f. d. gesammt. Naturwiss., vol. 
xlvi, p. 362. 
— 877. —- — A. Fritsch. Stud. im Gebiete der bohm. Kreideformat., 
il, Weissenberg. u. Malnitz. Schichten, 
p. 125, fig. 100. 
— 1898. GuLycIMERIS — G. Miller. Die Mollusk. d. Untersenon v. Braun- 
schweig u. Ilsede, p. 70, pl. x, fig. 4. 
— 1901. Panorma — F. Sturm. Jahrb. d. k. preuss geol. Landesanst. fiir 
1900; vol: xxi; p. 70; plex, tie. 4. 
Description —Shell more or less oblong, rounded, convex; posterior part 
somewhat compressed, anterior part sloping more or less rapidly to the margin ; 
moderately or considerably inequilateral; posterior gape large. Anterior margin 
more or less convex, sometimes subtruncate; antero-ventral margin rounded ; 
ventral margin shghtly or moderately convex, nearly parallel to the dorsal margin ; 
posterior margin convex, or subtruncate and rounded; postero-dorsal margin 
nearly straight. Umbones incurved, often broad, sometimes narrow and pointed ; 
the dorsal part of the shell in front of the umbones is moderately or considerably 
depressed; sometimes a more or less distinct carina extends from the umbho 
towards the antero-ventral extremity; another carina, usually faint, may extend 
from the umbo posteriorly. Palhal sinus large, rounded. 
Ornamentation consists of concentric folds, which may be conspicuous or only 
faintly mdicated, and of numerous radial rows of minute granules. 
Measurements : 
(1) (2) (3) (4) (5) (6) (7) (8) (9) 
engi -eodouw O08 = 69% 6o° 2 “Ol. 56 2. 50 . 439 2 33° mm: 
leionih we Ao eeeeetOre. SOO e667 oor 5 129%. 929° Wo 24... - 19 -,, 
(1,5) Perna-bed, Atherfield. 
(3, 4, 6—9) Crackers, Atherfield. 
(2) Ferruginous Sands, Shanklin. 
Affinities—This species has been referred by most authors to the genus 
