LEPTOSOLEN. 219 



SoT.ECUKTus? (Azoii?) AcTEOx, iVOrhhjmj, 1850. Plate XXXV, figs. 5, G. 



1850. SoLECURTUs AcTEON, A. d'Orhiijiiy. Prodr. cle Pal., vol. ii, p. 158. 



1867. — — E. Giii'ranyer. Album Pak'out. de la Sarthe, p. 12, 



pi. XV, figs. 1, 2. 

 1870. — — F. Stoliczha. Palseont. ludica, Cret. Fauna S. India, 



vol. iii, p. 99. 



Description. — Shell somewhat oblong, moderately inequilateral, moderately 

 conve.x, witli flattened sides and flattened postero-dorsal area. Anterior margin 

 rounded ; postero-dorsal margin nearly straight, sloping ventrally fi'om 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 (approxhaatc) ; 



(1) (2) 



Length . . . 46 . 20 mm. 



Height . . . 24 . 10 „ 



(1) Haldou, (2) Dunscombe. 

 Affi)dties. — Only two specimens have been seen ; they resemble closely 

 Cxueranger's figures of -S'. Adeon. 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 ScJdd-iiIinrhia rostnita) of Haldon. 

 Cenomanian (]\Ieyer's Bed 10) of Dunscombe, South Devon. ^ 



G'ejnf.s'^LEiTOSor.EN, T. A. Conrad, 1867. 



('Amer. Jouru. Couch..' vol. iii, pp. 15, 188 ; F. B. Meek, 'Invert. Cret. and Tert. Foss. 



U. Missouri,' 1876, p. 252.) 



Leptosolen Dupixr.ANUs (d'Orhiijuij), 1845. Plate XXXV, figs. 7, 8. 



18-15. SoLEN DupiNiANUS, A. (V Oihlij)) I/. Pal. Frauc. Terr. Cret., vol. iii, p. 320, 



pi. cccl, figs. 3, 4. 

 1850. — — A. d'Orbi(jny. Prodr. de Pal., vol. ii, p. 135. 



1 An internal cast from the Ceuomauiau (Bed 11) of Dunscombe, South Devon, resembles 

 Soleciirtiif !i'(ii(a}is, d'Orbigny, l>ut is not sufTuientlv well-preserved for ideutificatiou. S. /cqiialig has 

 been referred doubtfully to the genus rharrlln by Stoliczka and by Meek, whilst de Loriol regards it 

 as belonging to Siliquaria (= Tagahig). See d'OrV)igny. 'Pal. Fi-au?. Terr. Cret.,' vol. iii (1845), 

 p. 321, pi. cccl, figs. 5—7, and 'Prodr. de Pal.,' vol. ii (1850), p. 158; Gueranger, ' Allmm 

 Paleout. de la Sarthe ' (1867), p. 12. pi. xv, fig. 3. 



