LEPTOSOLEN. 219 
Sotecurtus ? (Azor?) Acrnon, d’Orbigny, 1850. Plate XXXV, figs. 5, 6. 
1850. Sorecurtus Acrgon, A. d’Orbigny. Prodr. de Pal., vol. ii, p. 158. 
1867. _- — HE. Guéranger. Album Paléont. de la Sarthe, p. 12, 
pl. xv, figs. 15 2: 
1870. — —  F-. Stoliczha. Paleont. Indica, Cret. Fauna S. India, 
vol. iii, p. 99. 
Description.—Shell somewhat oblong, moderately imequilateral, moderately 
convex, with flattened sides and flattened postero-dorsal area. Anterior margin 
rounded ; postero-dorsal margin nearly straight, slopimg ventrally from the umbo ; 
posterior margin slightly convex, somewhat oblique ; ventral margin nearly parallel 
to the dorsal margin and forming a rounded angle with the posterior margin. 
Umbones broad, inconspicuous. Ornamentation consists of strong, regular, con- 
centric ribs, separated by furrows of greater breadth. 
Measurements (approximate) : 
(1) (2) 
Length : ; 46 20 mm. 
Height : 24. ; Oe, 
(1) Haldon, (2) Dunscombe. 
Affinities—Only two specimens have been seen; they resemble closely 
Guéranger’s figures of S. Acteon. The hinge is unknown, so that the generic 
position cannot be determined at present. 
Type.—From the Cenomanian of Le Mans. 
Distribution.—Upper Greensand (zone of Schlanbachia rostrata) of Haldon. 
Cenomanian (Meyer's Bed 10) of Dunscombe, South Devon. 
Genus—LeEprosorEn, 7’. A. Conrad, 1867. 
(‘ Amer. Journ. Conch.,’ vol. iii, pp. 15, 188; F. B. Meek, ‘Invert. Cret. and Tert. Foss. 
U. Missouri,’ 1876, p. 252.) 
Leprosonen Dupintanus (d’Orlbigny), 1845. Plate XXXV, figs. 7, 8. 
1845. Soren Durrnianus, A. d’Orbigny. Pal. Franc. Terr. Crét., vol. ii, p. 320, 
pl. ecel, figs. 3, 4. 
1850. — — A. d’Orbigny. Prodr. de Pal., vol. 11, p. 135. 
1 An internal cast from the Cenomanian (Bed 11) of Dunscombe, South Devon, resembles 
Solecurtus equalis, V Orbigny, but is not sufficiently well-preserved for identification. S. wqualis has 
been referred doubtfully to the genus Pharella by Stoliczka and by Meek, whilst de Loriol regards it 
as belonging to Siliquaria (= Tagalus). See d’Orbigny, ‘ Pal. Franc. Terr. Crét.,’ vol. ii (1845), 
p- 321, pl. eccl, figs. 5—7, and ‘Prodr. de Pal.,’ vol. ii (1850), p. 158; Guéranger, ‘ Album 
Paléont. de la Sarthe’ (1867), p. 12, pl. xv, fig. 3. 
