KXPJ.ANATION OF PLATE LXV. 



Cardii'.m uNiFOKJns n. s]) p. 58S 



1-2. Lateral ami iiusleriMr \ie\\s of a \-cry prrfccl I'nlcrnal cast. 

 3. Squeeze taken fruni a purtien "f the natural external mould 

 of tile same. 



irniulhiiry ,-hiy: I.orilhird. (102). 



C.viiUiuAr RJtTj'YANLiM Conrail p. 582 



4-5. Pristerior and lateral views of a complete internal cast, 



(X2). 



6. Lateral \ieH' id" anotlicr internal cast, (x2.). 

 irmiJIuirv chiy: f.i'rilliird . {li>2). 



C.\RriiuM DfMoscAr Coiu-ad p. 5Q0 



7-8. The mcomplete cast of a left valve and a squeeze taken frrjm 

 the natural niMuld i>\ the exterior i.jf the >ame. 

 9. I^ateral view (if a small, very perfect internal cast. 

 10. The same ( xj ). 



]]'"inlbiiry chiy ; Luriilard, {102). 



C.\RniL'j[ pif.si'.ro'i n. sp p. 594 



ii-ij. Lateral \-iews of two internal casts, a left \al\-e and a right 

 valve. 



ML-i\luiiit:-illc clay-iiiail: Lciwla. (103). 



C.\RIUUM TRNUISTRIATUM (Whitfield ) , p. 591 



13. View of the type specimen. 



ll'ciionali sanij : near ^hirlhorn. 



14. View of a squeeze from a natural mould of the exterior, to 



shriw the character of the surface markings. 



ifi'rchanlvUlc clay-marl; Lciiohi, ti(>3). 

 15-16, Ivatcral and posterior views rd a nearly iierfeet internal cast. 

 Mrrirliaiilzullr rlay-iiiarl : l.ciinla, {Jfi^}. 

 17. A ri.glu vahe partially prcser\'inn" of the shell. 



Maisliallloi^'ii rlay-iiuirl : iicai- .S'lei'i/ct/iero, (777). 

 18.-19. Anterior and kateral \iews of a nearly |)erfect internal cast. 

 MaisIialltd'cKii riay-iiiarl: Marsluililnwii . (l<jO). 



CaRDIUM TRILI.INE.M'fM n. Sp., p. 589 



JO. A sijueeze from a natur.al monid of the exteri.jr, showing the 

 char.acter of the siudace m.arkings. 



Xiii'isiiik marl: .lllaiilic lli:.;lilandi, ( lOS ) . 



Pkotocardiu.m jeksf.yensis n. sp., p. 596 



21. The internal cast of a righi \alve, (X2). 



McrrhaiilviUc clay-iiiail : near laiiicshiirg. (140). 



