PLATE XIX, 
Mg. Page 
1. XipMorliyncIius prisms ; portion of skull, supe^ 
rior and left lateral (1 a) aspects.—London Clay; 
Sheppey. etli. Ethmoid, fr. Frontal, moo. Maxilla. 
na. Jfasal. pmx. Premaxilla, prf. Prefrontal (ect- 
ethmoid), sd, Sclerotic, 1 h. Oral face of right pre¬ 
maxilla, [28711.] 492 
2. Ditto; hinder portion of skulls superior aspect.—Ibid, 
ep.o. Epiotic, /r. Frontal, pa. Parietal, pt.f. 
Postfrontal (sphenotic). s.om, Supraoccipital. sg. 
Squamosal, . [32387.] 492 
3. Acestrus ornatus^ sp. nov.; portion of skull, superior 
aspect.—Ibid, Letters as above, ' [P, 1739,] 494 
