CYPRINA. 1:55 



Sowc-Hiy, l)y Briart and Comet, ' appears to he more neaily related to C. cuneata 

 than to C. uiKjidala. 



G. securiformis, Sluirpe, - is similar to C. cuneata, but its ventral niar-'in has a 

 nmeli greater cin-vature. 



C. cuneata is mentioned by Stoliczka as a typical example of tlie sub-genus 

 Veniella, Stoliczka. ^ The anterior right cardnial tooth, however, does not appear 

 to bo so strongly developed as in the type of VcidcUa. 



Ttjpes. — The types came from Blackdown, but cannot now be found. 



Distribution. — Upper Greensand (zone of Schlu.'nhachia runtrata) of l>la(.-k(l(n\ n 

 and lialdon. Upper Greensand (Meyei"'s Bed 2) of Westou Mouth (Devon). 



Cypeina cl.\xbiensis, sp. nov. Plate XXI, fig. 2; Plate XXIV, fig. 1. 



Descri[)llou. — Shell large, stout, oval, rather elongate, consideraljly ineipiiluteral, 

 moderately convex. Antero-dorsal margin short, straight or slightly concave. 

 Anterior margin well rounded, passing gradually into the convex ventral mai-gin. 

 Posterior margin oblique, sul>truncate, more or less rounded. Postero-doi'sal 

 margin rather long, slightly convex. Umbones broad, curved anteriorly, with a 

 rounded carina extending to the postero-ventral extremity, and limiting a flattened 

 or somewhat convex postero-dorsal area which slo[)es rapidl}' to the postero- 

 dorsal margin, but more gradually to the posterior margin. Lunidar region 

 excavated, not limited. Ornamentation consists of small concentric ribs. 



Hinge : in the right valve the anterior cardinal is conical, larger than the 

 median cardinal, and placed below and separated from the latter; tlie posterior 

 cardinal is oblique, laminar, and divided by a furrow. In the left valve the 

 anterior and median cardinals are stout, the posterior cardinal is obliijue and 

 laminar. 



Measurements (ajjproximate) : 



(1) (2) (■■<) 



Length . 99 . 80 . 74 mm. 



Height 75 . ()!• . 5(i „ 



Aljinilivs. — This species resembles C. Cuudanti, Dollfus,' from the Kimeridgian, 

 1 Meulu (le Bracquegnies (' Mi-m. cour. et Mt'm. des. Sav. (.'traugers,' vol. x.\xiv, 1807). i>. Oy, jil. 

 viii, figs. 2G— 28. 



- ' Quart. Jouru. Geol. Soc.,' vol. vi (1850), p. 182, pi. xxii, figs. 1—3. C. globom, Sharin; (ILiJ., 

 p. 182, pi. XV, fig. 1) is recorded by Morris from Blackdowu, but I have seeu uo example of it. 



•■' 'Palffiont. ludica, Cret. Fauua S. India,' vol. iii (1870), p. 189. See also Meek. 'luvert. Cret. 

 aii.l Tert. Foss. U. Missouri' (1876), pp. 147—152. 



■i ' Fauue Kimmrrid. du Cap de la Hcve ' (1863). p. 65, pi. x, figs. 6—8. De Loriol and Pellat. 

 ' Mou. Etages supur. Jiuuss. de Boulogue-sm--Mer ' (187-1). p. 42, pi. xii. fig. 14. 



