lOG CliK'l'ACL'^OLS LA.M KI.LI IJIi ANCHIA. 



vt'iili'al slii|R'. TIk' ribs arc iiioiv iiuiiicrdus lliaii in Lncin(( Xrrcis, d'Orljigu}',^ 

 I vmw t lir (V'lioiiiaiiiaii. 



I'islribittidu. — Uppor Greciisaiid (zone of Scltlirulincliiii nistfdfn) ol' IJlacktlowii. 

 Up[)er Greensaiul near Ijyiiie Regis. 



LuciNA I'lSU.M, Soircrlii/, ]S'M>. Plate XXIV, figs. ](J — !',•. 



1836. LuciNA I'isuM. /. ih C. Sowirhij. Traus. Cleol. Soc, ser. i, vul. iv, iip. 241, 



a-11. 1)1. xvi. fig. 14. 

 1850. — — A. d'Orhlyiii/. I'milr. <k' Pal., vol. ii. p. l(i-2. 



1854. — —J. Morris. Cat. Brit. Foss., ed. 2, p. 208. 



1871. — — F. Stolivzlai. Palauout. ludica, Cret. Fauua 8. India, vul. 



iii, p. 252. 



Noll 1814. — — A. d'Orhiijnij. Pal. Fi-au9. Terr. Cret., vol. iii, pi. L-cl.\.\xi, 



figs. 3 — 5 {L. Cornuvliana, p. llli). 

 r — 1868. — — A. Brlarl iiikI F. L. Cornet. Meide de Bracqueguies (Mem. 



cour. et Mi'Ui. des Sav. utraugers, vol. 

 xxxiv), p. 69, pi. viii, figs. 18 — 21. 



Dcacriptioii. — Sliell .small, verj^ convex, with nearly circnlar outline, slightly 

 ine(|uilateral ; length and height nearly ecpial. Anterior and ventral niargin.s 

 forming a regular curve ; posterior margin slightly truncated, forming an obtuse 

 angle with the postero-dorsal margin. Umbones rather large. Lunule ovate, 

 broad, depressed. Escutcheon indistinctly limited. Ornamentation consists of 

 concentric ribs, with "Towth-rinas at intervals. 



(1—3) Blackdowu. 



li'tiiiarls. — The form referred to L. jjmtin by Briart and Cornet is ninch larger 

 llian the English exam])les of that species, and also differs in its relatively longer 

 and more compressed shell. 



Ti/j)r. — From Blackdown ; in the Bristol Museum. 



Di.'i/riliiitioii. — Upper (jreensand (/.one of Sclihriiliitclun rosti-ntn) of Blackdown. 



1 Trodr. de Pal.,' vol. ii (IS.W), p. 162. Gu.'-raugvr, 'Alhuiii Pal.'.mt. du la SaHlie" (1867), 

 p. 12, [il. XV, fig. 15. The hinge figured by Gut'ranger does not agree with Liiclna. Stoliczka suggests 

 that this species belongs to (Jijprimeria, see ' Palieont. Indica, Cret. Fauna S. India' (1871), 

 pp. 164, 253. 



