PLATE XXVIII. 



Fig. Page. 



1. Paehyrhizodus (?) magnus, A. S. Woodward; head, distorted above, left 



side view, two thirds nat. size. — Probably zone of Holaster subglo- 

 bosus ; Hollingbourn, Kent. B. M. no. 37981. ag., angular; no., 

 antorbital ; d., dentary ; epo., epiotic ; eth., mesethmoid ; fr., frontal : 

 m.r., maxilla; pa., parietal; pmx., premaxilla; po., postorbital; 

 qu., quadrate; smx., supram axilla ; so., suborbital; socc, supra- 

 occipital; sq., squamosal; a?., upper cheek-plate. 131. 



2. Elopopsis crassus (Dixon) ; head in right side view and (2a) upper view 



of snout, two thirds nat. size, with (2b) left premaxilla, (2c) part of 

 left dentary, and (2d) an anterior vertebral centrum, nat. size.— 

 Probably zone of Terebratulina gracilis; Mailing - , near Lewes, 

 Sussex. Willett Collection no. 01, Brighton Museum, iop., inter- 

 operculum; pop., preoperculum ; sop., suboperculum ; other letters 

 as in fig. 1 . 1 34. 



3. Ditto ; left dentary, outer view, with (3 a) four lower teeth and (3 h) 



five maxillary teeth enlarged four times. — English Chalk. B. M. 



no. P. 10010. 135. 



4. Ditto; imperfect scale, three halves nat. size. — Zone of Tthynchonella 



cuvieri; Wouldham, Kent. G. E. Dibley Collection (B. M. no. 



1'. 10320). 1:15. 



5. Thrisxopater rnegalops, A. S.Woodward; head with pectoral arch, left side 



view. — Probably zone of Holaster subglobosus ; near Lewes. Capron 

 Collection (B. M. no. 10820). op., operculum; pel., postclavicular 

 plate; pit., post- temporal; sc., sclerotic ; scl., supraclavicle ; other 

 letters as in figs. 1, 2. 137. 



Unless otherwise stated, figures are of the natural size. 



