PLATE LXII. 



Supplementari/ Figures. 

 Fir.8. 



1. Crassatdlites ? equisidcatus (Woods). Chalk Rock, Cuckhamsley. Sedg- 

 wick Museum. Intenuil cast. a, right valve; //, dorsal view. 

 (P. 426.) 

 2,3. C'ljpr ina 3fe>/eri, Wooih. Ferna-hi'i], Sniidowii. 2, Sedgwick Museum. 

 2(1, left valve; l>, dorsal view; <-, hinge, o, Museum of Practical 

 Geology, No. 1G747. Right valve. (P. 427.) 



4. Cyprwa ? vediaiia (Fori).). Lower Greensaud (Crackers), Atherfield. 

 Sedgwick Museum. ", left valve; b, dorsal view; '■, portiou x 4. 

 (P. 427.) 



5, 6. Unicanllum ? comjjrcssiim, Woods. Lower Greensand (Crackers), Ather- 

 field. Sedgwick Museum, ba, G, left valves, bb, dorsal view of 

 ba. (P. 428.) 



7 — y. Unicarclium ? Mailleanum (d'Orb.). Hase of Chalk (zone of Scldcen- 

 bacJtia rnrians). 7, Beaminster; O.xford Museum; right valve. 

 8, Cerne Abbas; Oxford Museum; left valve, internal cast. 9, 

 Maiden Newton. Sedgwick Mu.seiim. <(, left valve ; b, dorsal view. 

 (P. 428.) 

 10. Tcllina ? phaseoliiia (Phill.). Sj^eeton Clay, Speeton. York Museum. 

 Perhaps the type. Liternal cast, a, left valve; b, dorsal view. 

 (P. 429.) 



11,12. TMliur^ subjilia^i'ollnii (d'Orb.). Gault, Folkestone. 11, Briti.sh 

 Museum, No. L 4y82 ; cf, right valve; />, dorsal view. 12, Sedgwick 

 Mu.seum ; left valve, x U. (P. 430.) 



13. Cijprimeria {Cyclorisma) siibmersa (Sow.). Upper Greensand (zone of 

 ScMdsnhacMa rostrata), Blackddwn. Ivxeter Museum. ii,]v\'t valve; 

 b, dorsal view; c, hinge x 2. (I*. 1-3 l.j 



1 I-. Tapes (Iciniotia) sp. Upi)er Greensand (zone of Schla'nbdchia rostrata). 

 Blackdown. Briti.sh Museum, No. L 17225. (/, right valve; b, 

 posterior part x 4. (P. 431.) 

 1.5 — 17. Lepfosolen? rertiiiKjiibiris (Woods). Chalk Rock, Cuckhamsley. Sedg- 

 wick Museum. Internal casts. 15, right valve. Ki, dorsal view 

 of both valves. 1 7, left valve. . (P. 432.) 

 18,10. Thracia? gracilis (Sow.). Upper Greensand (zone of Schla'nbachia 

 roslrata), Blackdown. Sedgwick Museum. 18(7, right valve; 18/^ 

 dorsal view. 19, left valve. (P. 432.) 



