EXPLANATION OF PLATE CX. 



C^'Tiii;ki-:is i'.assi.eki L'lrich p. 843 



1-3. Left lateral, antciaur tiiifl ventral vicw^ of a cfunplete cara- 

 pace friiiii the Enceiie of Maryland. (After L'lrich.) 



B^"TIillC^•]•HIS 1'.\kii,is L'lrich p. S_|.; 



4-5. I\i,Ljht lateral, and \eiUral view.-- of a conijilete carapace from 

 the Eocene of Maryland. (After L'lrich.) 



6. hiside view of right \'alve. (.After L'lrich.) 



7. Inside view of loft \'aK'C, (.After L'lrich.) 



CvTHERELL.v sff..M.\KC.i.\'.\T.\ L'lrich p. H45 



8. A left val\-e sliowiny sligdit mesial depression and inargin.al 



rim, from the Eocene of Marylaml, ( .Vfter L'lrich.) 



9. Ventral xiew of same. (.After L'lrich.) 



Sc.MPELLUii Cijni:.\|)I ("jahli p. K45 



10. A'iew C'f ;i sctital plate. 



I iiici'iiti'wii liiiiirsaiiJ; near 1 1 urtti'iUc, (I/O). 



L'.\I)ETERMIXEI> CRUST.\CE.\X, 



11. Lateral view of one of the leg joints. 



M ci-chaiil-villc clay-marl: I.ciiala. (/^'3). 



Hofl,of.\Ki.\ i;.\i;i:i PiKhry p 846 



12. Left propodite, outer face ; the dactylopudite supplied from 



another specimen. 



13. I^eft iiropoilite. profile \ic\v. 



14. Portions of fdur ahdominal segments. 



15. Section of anterior curl i.if s;ime. (.All after PiKhry.) 



M irclianlvillc clay-marl : Lcnaki. (16^;). 



LIf)PI.OP.\i;I.\ G[,.\rii.\TuK Pilshry p. 848 



1(5. Pro|>odite with dact\'lo|iodite. 



17. Ontlin.e of the liroken finger^ of the same. ( .\ter Pilsiiry. ) 



M crcl.anlvillc clay-marl: Lciinht. (/()_?). 



C.M.I. I,\N.\SS.\ COXK.MII Pilshry p. 851 



18. \'ie\v of a left pro; o<lite. 



'J'iiilun I'cds: near J'rccliold. (/J-'), 



19. A'iew of a ri.ght iiropoditc. 



Tiatcn I'Cils: Sccrs J I ill Cnl. iuc/). 



20. Profile \icu of k-ft pro|iodite. (.After Pilshry.) 



21. Inner f.ace of same. (.After Pilshry.) 



22. Posterior view laf same. (.After Pilshry.) 



1 104 



