EXPLANATION OF PLATE EXXVIIL 



Xi;xni'H(ik.\ i.KPRosA ( .Mfirtnii ) ;-. G';o 



I-,?. Lalcr.'il, \rrtical anil lia-al \ac\vs of an iiUcrnal casl. 

 Xti-rciiiil; luiirl : llltinlic 1 1 ii;lilands. 



Exni'i'TvCM A nini.iCATA ( Tunnuy ) \i. O92 



4-(i. Patural. lia^al aaid 'ertical xicw s nf an internal cast. 

 M cTi-haiif-i'illc iUiy-iiuirl : Lciu'hi. ( /05J . 



Tuia;iTF.i,i, \ oi'AnKii.iKA Jnlnison li. 6:j5 



7. Lateral view nf a plaster cast frcaii a natural ninnld. 



Cliffwnod ihiy: Cliff w^nul J'"iiit. ( /03 ) . 



TuRKITi;i.l.A IJ'NilKF.N'SIS 11. sp., p. 6g8 



8. Lateral \ie\v nf a plaster ca--! frrmi a natural ninnlil, 



McrclunitvUlc ilay-inarl; L.ciiula, iiOs). 



TcRRiTi;i.i..\ sp., 



9. Lateral \iew '<{ an internal cast. 



Miniasqiiaii iiinri : I'lii'iuiii'^dnlc. 



TuRRiTi-;i,i..\ f:>;crinoiiii;s Morton p. (iij4 



lO-II. Lateral views r.f two internal casts illii^trated li_\- Whitfield. 



Xtiz'csiiik iH'.'rl. 

 I2-I,V Lateral \'iews of two fraifiiientary internal casts. 

 A'ui'csiiik marl: uctir Halii/in-d , [140). 



TCRRIT!':I,!,.\ VERTF.l'.ROInr.S Morion p. 693 



14-1^". Lateral views of two specimens froon Enfaiila, .\laliania, 

 [,reser\-inn- the shell. 



Coll. I\ S. \al. Miis., .V-e .'/../aV. 

 tTi. L.ateral \iew of an in'.ernal cast. 



Xtrr'cslii!: i,ui:l: near U'ahifnrd. 17-/0). 

 17. Lateral \ie«- of a lar.oe iiUtrnal cast illustrated liy Whitfield. 

 Xavcsink marl. 



1040 



