LIMOPSIS. 
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— 
PECTUNCULUS EUGLYPHUS, sp. nov. Plate XIV, figs. 13 a—e. 
Description.—Shell inflated, nearly equilateral, outline rounded, length and 
height nearly equal; posterior border (especially its dorsal part) less curved than 
the anterior. Umbones large. Hinge-line moderately long. Ornamentation con- 
sists (1) on the anterior part of the valves of numerous fine, rounded, radial ribs, 
crossed by very faint concentric ridges and a few distant growth-lines ; the radial 
ribs are separated by well-marked but narrow grooves with puncta; (2) on the 
posterior part of the valves of broader, flatter radial ribs, crossed in a regular 
manner by fine, rather closely-set concentric ridges. 
Measurements : 
Length . : : , ; ; : 22 mm. 
Height . ; : : ; 22 
Affinities.—Pectunculus subpulvinatus, @ Archiac, from the Tourtia of Tournay, 
be] 
apparently differs from this species in the obliquity and greater convexity of the 
valves, and in the ornamentation being somewhat coarser and of the same type on 
the anterior and posterior parts of the shell. 
P. euglyphus is more inflated than P. sublevis, and also differs in the character 
of the ornamentation. 
Types.— Three specimens in Mr. Meyer’s collection. 
Distribution.—Chalk Marl (Meyer’s Bed 11) of Dunscombe. 
Genus—Linopsis, A. Sasso, 1827. 
[‘ Giornale Ligustico di Scienze,’ i, p. 476.] 
LIMopsIs ALBIENSIS, sp. nov. Plate XV, figs. 1 a—d, 2—4. 
1874. Precruncuuvs, sp., F. G. H. Price. Quart. Journ. Geol. Soc., vol. xxx, 
p- 360 (in list from Bed ii). 
1879. -- — (= Lvcrya orsicuraris ?), Price. The Gault, p. 62. 
Description.—Shell small, oval, shorter than high, somewhat inequilateral and 
oblique, of moderate convexity, compressed postero-dorsally. Anterior and 
ventral margins evenly rounded, posterior less curved and forming a blunt angle 
with the hinge-line. Umbones of moderate size, pointed. Hinge-line long, more 
extended posteriorly than anteriorly. Hinge-area long. Ornamentation consists 
of broad, flattened concentric ridges, separated by sharp, narrow grooves. Radial 
