EXPI^ANATION OF PLATE XIX. 



WORI! EuKRdU' p. 311 



1. View of an individual nf average size. 



Tintoii Beds: Bci-rs llill Cut. iijg"). 



SEP.Pi;r..\ wiiiTi'iEi.Di n. .sp p. 308 



2. \'iew uf the type specimen. illustrateJ. l)y Wiiitfield a.s Ijiflu- 



iOiiclia crctacca. 



Nai\'siiik Marl. 



EI.xjRT.rs ':'■: sfi p. 311 



3. A'iew nf tile internal cast. 



4. \ lew i)f a sfjiieeze sli<.'\\iiii:i; the external eiiaracters. 



U'ciii'iiuli saiul : ncur C ran' lurch Cnnirr, {i?6''). 



Sei.'.pi.'L.v ciitci'L.xkis 11. sp., p. 307 



5-6. Twii \'iews rif the type specimen. 



Marshalltoian riay-marl : iwar SzccdcshC'ro (,/"7). 



ELXMULUS I.INE.M'fS 11. Sp p. 3IO 



7. Vie\v of the specimen selected as type. 



Mrrchaiitzallc rlay-iiHirl; J. curia. (J^;.?). 



SekpuL-v Ro'ruE.\ (Morton ) p. 30S 



S-g. A sinistral and dextr.il stiecimen fr^mi the up-per surface. 

 10. A sinistral specimen from the under side, shrjwing the point 

 of attachment. 



riiimilrrzan liiiir.'tanJ ; I' iiicciiiaiaii. iiji). 



EL\Mur,rs i',\i,c.\Tfs ( Ctmrad ) p. 309 



11-12. A'iews (if l«n different indixiduaE illu-lraled l:n" A\'hilheld. 

 Xavrsiiik marl. 



giS 



