EXPLANATION OF PLATE LXXV. 



Dkntat.ium sriiAKCUATUM Conr.-ul p. 66i 



1. \'ii;\v of a squeeze frniii a natural ninuld of Ihe exterior. 



2. \'ie\v of an iuterual cast. 



Il'onilbury cUiy ; LuriUurd. (JO?). 



C-\DLLL'S (IP.NUTUS ( CnliraJ ) p. 663 



3-4. Lateral ^'ieu's from elifferent sides cif Uvo internal casts, 



(X2). 



Woodbui-y clay: Loiillard, (Jii3). 



P.XTF.IJ.A TENTUHIUM Miirdnl, p. 663 



5-6. Lateral and \'erlical \'ie\vs eif the type specimen, (x2l. 

 Xavcsiiik mail: near .InicytozciL 



Plrurcitomaki.v CKOTAi,oirii;s ( }.Iorti:in ) , p. 665 



7-9. \ ertical, basal and lateral \-iews uf an internal cast. 



Xarcsinh marl: near Crawlords Corner, (126'). 



Pi.i;uROTO,MArii.\ EkiTToNi W'hittield p. 667 



10-12. L.ater.il, \-ertical and lia^al views of the type specimen. 

 Manasijnaa mai-l: I'armingjale. 



Pi.i':rJ;oTRi;.\i.\ sni,,\KiiaiK.\iis AVhitheld p. 667 



13-14. Lateral and basal \ie\vs of one of Whitfield's type specimens. 

 1 'ineenlown liinesand: Timber Creek. 



Leiostr.\c.\ cretacea (Conrad) p. 671 



15. Lateral view of a siiccimen (X4). 



16. Lateral \ie\v of a specimen ( x4 ) . 



17. Lateral \aew of a specimen (X3). 



Il'eedbnry elay: Hadd^nfield , (183). 



Deli'Iiinl'ea navesin'kensis n sp p. 669 



1S-19. Vertical and Lateral \ie\\s ed the type specimen. 

 Xaiwsink marl: near ICulnferd, i-lQ). 



AL'\kcarita abvssin.\ ( f'.abb) p. 66g 



20-21. Basal and lateral \ieu s of an internal cast. 



Mercbanbi'ille elay-marl: Lenola, {103). 

 22. Lateral \'ie\v of an internal cast. 



Xavesinl: marl; Middletuien, (.113). 



1034 



