242 PROF. E. FORBES ON LOWER GREENSAND FOSSILS. 



Var. (3. Margin plain. Astarte Beaumontii Leym. pi. 4. f. 1. 

 a, b. (compared and identified with French specimens). 

 Loc. Culver (Atherfield, Sandown, Hythe, Peasemarsh). 



31. Astarte substriata Leym. pi. 6. f. 3. (and var. A. illunata, 

 pi. 6. fig. 2.) 



Loc. Reigate, Peasemarsh, Atherfield. 



32. Cardita neocomiensis D'Orb. T. C. pi. 267. f. 1 — 5. ? 

 Loc. Maidstone. 



Var. /5. infiata — Cardita quadrata D'Orb. pi. 267. p. 6 — 9. ? 



Loc. Maidstone. 



The specimens agree well with the figures and descriptions of 

 M. d'Orbigny. 



33. Thetis Soiverbii Roeiner. 



Yar. a. minor — Thetis minor Sow. M. C. t. 513. figs. 5, 6. 

 Var. j8. major — Thetis major Sow. M. C. t. 513. f. 1 — 4. 

 Loc. Atherfield, Hythe, Peasemarsh, Parham. 

 Note. Distorted specimens often resemble Isocardice. 



34. Cypricardia ? undulata. Sp. nov. PI. 3. f. 1. 



C. ? testa transverse oblonga, depressa, carinata, valde in- 

 sequilaterali, latere antico brevissimo, rotundato, latere postico 

 expanso, truncato, carinato, transverse sulcato, sulcis regular- 

 ibus, distantibus, ad carinam interruptis, reliqua testa transverse 

 striata, striis minutis regularibus, umbonibus sub-margi- 

 nalibus. 



Lon. max. O^j ; lat. 1^ unc. 



The form of this shell resembles most nearly that of some recent 

 Cypricardice. It is oblong, depressed, with almost marginal 

 beaks, and has the larger side greatly produced and expanded. 

 The shorter extremity is rounded and narrow, the other broad and 

 truncate. From the beaks to the anterior angle of the truncated 

 extremity runs a keel dividing the shell into two nearly equal 

 parts. The posterior division is deeply and distantly sulcated, but 

 otherwise smooth ; the anterior wants the sulcations, but is marked 

 with very fine and regular transverse striae. 



Loc. Atherfield. 



35. Isocardia ? ornata. Sp. nov. PI. 2. f. 10. 



I. ? testa longitudinaliter ovata, angulata, infiata, bicarinata, 

 postice truncata, transverse sulcato-striata, inter carinas striis 

 minutis obliquis angulatis ornata (nucleo laevigato). 



Lon. 0^ ; Lat. 0^- unc. 



Shell much inflated, oblique and somewhat triangular, longer 

 than broad ; two keels run divergingly from the beak to the mar- 

 gin, the longer bounding the abrupt truncation of the posterior 



