PLxlTE IV. 
Fig. Page 
1. Alhida oweni (Owen); distorted head, right lateral and 
superior (1 a) aspects, one third nat. size.—London 
Clay ; Sheppey. ag. Articulo-angular. hr. Branchio- 
stegal rays. d. Bentary. ep.o. Epiotic. fr. Frontal. 
lim. Hyomandibular. mpt. Metapterygoid. mx. 
Maxilla. op. Operculum. orh. Orbit, p.op. Pre¬ 
operculum. pa. Parietal, pr.f. Prefrontal. Pt.f. 
Postfrontal. qu. Quadrate. s.op. SuJboperculum. 
scl. Sclerotic, sq. Squamosal, x. Inner bone bearing 
crushing teeth. [P. 9158.] 61 
2. Ditto ; anterior end of parasphenoid {2Kis.) with vomer 
(v.) and ethmoid (eiJi.), oral aspect, one half nat. 
size.—Ibid. [30528.] 62 
