PLATE XXIX. 



Pecten {continued). 



Figs. 



1 — 3. p. {Camptcniedes) CoffahUnus, d'Orb. Leckenby Collection, "Woodwardian 

 Museum. (P. 156.) 



1. Lower Greensand, "Whale Cliiue. Eight valve. 



2. Perna-hed, Atherfield. a, left valve ; h, part of the same above the middle of 



the valve x 3. 



3. Penza-bed, Atherfield. Left valve, a, part near the middle of the dorsal third 



X 3 ; 6, part of the anterior ear x 4. 



4 — 6. P. {Camptonecfes) sfrhtfo-piinddfv^, Rom. (P. 157.) 



4. Speetou Clay (D 1). Mr. Lamplugh's Collection, a, part of left valve; 6, part 



of same X 3. 



5. Same horizon, etc. Anterior left ear x 3. 



6. Claxby Ironstone, Benniworth Haven. Woodwardian Museum. Part of left 



valve. 



7. P. (Camptonectes) curvatiis, Gein. Greensaiid, Great Haldon. Museum of 



Practical Geology, No. R 478rr. Left valve, a, natural size ; h, same 

 X 3. (P. 159.) 



8. P. {Campfonccfps) diihrisv'u.sis, Woods. Chalk Marl, Dover. British 



Museum, No. 38213. a, right valve; />, left valve; c, anterior ear of 

 h X 2. (P. 162.) 



