S6 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. 



2. SeMIESCHARIPORA 3fC>IIA. PI. II. lig. 1. 



D'Orbigny, Pal. Franc. Terr. Cretacees, toI. v. pi. 718. f. 10. 



Both the upper and under snrfaces are preserved : the drcum- 

 scrloed area of the fos^ttes, and the position of the rwo accessory 

 pores lii a line with the cell-mouth are good characters : the coarse 

 tuberculation of the lower side helps also to identity it. 



Zoc. Bogingarry : in chalk-duit. 



3. FLrSTRELLARiA DEXTATA. PI. II. fig. 2. 



D'Orh, /. c. pi. 725. f. 19. 



This is. without much doubt., referred to Flu^frellaria : and the 

 very irregular and dentared outiiue of the rhomboidal cells wiQ. I 

 think, safely connect it with F. denfafa, although we hare not the 

 upper surface. 



Loc. Bogiiigany, in chalk-flint. 



Destripticm of some of the Fo&siUJrom the Vpper Greensand. 



4. TOXASTER, sp. PL II. fig. 4. 



This form, though too imperfect for description, appears to be 

 distinct from either of the other two described British species. It 

 is more depressed than either T. Greetiorii or T. Fitfoni, Forbes. 

 It has a shallower sulcus than the former, and the vertex is more 

 central than in the lauer. If new, it might be called T. Scoticus. 



5. AvTcrLA sTMrLATA, Baily. PI. II. fig. 5. 



We have only the left valve : it is obhquely ovate and modentehr 

 convex : auricle small ; nmbone prominent ; ccstae about 14, radiating:^ 

 unequal and distant, with fainter ones in the interstices, crossed by 

 well-marked concentric lines of growth. 



This specimen is a cast of the interior of a single left valve, with 

 the smaller ear broken away ; it is otherwise well preserved. It 

 bears some resemblance to Arinda iiueqtthalris ; but dififers in its 

 greater obhquity. It is very distinct firom the only other Upper 

 Greensand species, A. gryphteiyide*. as weU as from A. amomaloy 

 found in the greensand of Blackdown (W. H. B."). 



6. PECTTNcrLrs r>rBOXATrs, Sow. '. Min. Conch, pi. 472. f. 3. 

 Sowerby's figure has so much coarser ribs than our specimen, 



which, though only an internal cast, shows numerous strise on the 

 nuurgiD, that it is not at all certain they are identical. Gioldfuss's 

 figure (Petref. pi. 126. f. 2) seems intermediate in this respect. 



The interior cast of P. sMicoMcemtricus, Lamarck, as figured by 

 D'Ch-bigny (Terr. Cret. pi. 306. f. 12—19), would much resemble oar 

 shell ; but that species was wider in proportion, even in the young 

 state. 



7. LiMOPSis TEXTVRATA, Salter. PL II. fig. 6. 



Obhquely ovate, considerably longer than wide, and with a cwivei 

 pro*iuceid beak : radiated by 14 or 15 cc4irse sharp-edged coistae. 



