PLATE X. 



Fig. Paob. 



1. Lepidotns viantelli, Agassiz; occipital portion of skull, abraded below, 



hinder view and left side view (1 a), nat. size. — Wealden ; Hastings. 

 Egerton Collection (B. M. no. P. 1124). ho., fragment of basi- 

 occipital ; epn., epiotic ; exo., exoccipital; ./". wi., foramen magnum; 

 opo., opistliotic ; p-o., pro-otic; st., supratemporals ; x., foramen for 

 exit of vagus nerve, 'S7. 



2. Ditto; hyoid arch, two-thirds nat. size. — Upper Purbeck Beds; Perch 



Hill, Brightling, Sussex. B. M. no. 23624. hr., upper branchio- 

 stegal ray ; ch., ceratohyal ; cph., epihyal ; hyli., hypohyal. 43. 



3. Ditto; head in upper and right side view, and remains of jaws in front 



view (3a), nat. size — Upper Purbeck Beds; Netherfield, Battle, 

 Sussex. E. J. Baily Collection (Hastings Museum), ag., angular; 

 CO., circumorbitals ; d., dentary ; fr., frontal; iop., interoperculum ; 

 ■m.r., maxilla ; r)j9., operculum ; ^a., parietal; pmx., premaxiWa; po., 

 postorbitals; ;>o2).,preoperculum; ji>rt>.,preorbitals; j;/^., post-temporal; 

 sop., suboperculum ; sq., squamosal; st., supratemporals. 37. 



