﻿CHOfJERIT)^. 65 



a gently wavy oral margin, a short post-oral margin nearly parallel 

 to the symphysial, and the beak prominent ; beak-tritor divided into 

 a series of small separate tritors ; anterior outer tritor relatively 

 small, divided into two or more portions ; posterior tritor absent ; 

 median tritor large, occupying the middle of the tooth, immediately 

 below and in advance of the anterior outer tritor. Palatine tooth 

 with the posterior inner and median tritors very large, and the 

 outer tritor divided into a short series. Vomerine tooth with a series 

 of five or six tritors, the inner being larger than the others. 



Form. Sf Loc. Portland] an : Oxfordshire, Wiltshire, and Dorset- 

 shire. (Derived fossils in Neocomian Bone-beds of Bedfordshire and 

 Cambridgeshire.) 



P. 474. Left mandibular tooth figured by Agassiz, torn. cit. pi. xl. 

 tig. 20, to be regarded as the type specimen : Great Milton, 

 near Oxford. Egerton Coll. 



P. 3095, P. 3095 a. More imperfect right mandibular tooth and 

 fragment ; Great Milton. Ennishillen Coll. 



P. 1136, P. 4450. Fragments of mandibular teeth ; Great Haseley, 

 near Oxford. Egerton Sf Ennishillen Colls. 



46400. Imperfect right mandibular tooth, noticed by E. T. Newton, 

 op. cit. p. 36 ; Swindon, Wiltshire. Cunnington Coll. 



P. 6033. Right mandibular tooth ; Portland. 



Presented by George Clifton, Esq., 1889. 



40476. Much abraded right mandibular tooth, figured by E. T. 

 Newton, op. cit. pi. xi. fig. 2; Neocomian Bone-bed, 

 Potton, Bedfordshire. Purchased, 1867. 



P. 3096. Fragments of mandibular teeth : Potton. 



Ennishillen Coll. 



P. 6032. Associated fragments of teeth ; Portland. 



Presented by George Clifton, Esq., 1889. 



P. 409. Left palatine tooth; Portland. 



Presented by William Davies, Esq., 1881. 



P. 1135. Bight vomerine tooth, noticed by Agassiz, torn. cit. 

 p. 344, and by E. T. Newton, op. cit. , p p. 36 ; Garsington, 

 near Oxford. Egerton Coll. 



P. 3096 a. Left vomerine tooth ; Potton. Ennishillen Coll. 



PAET II. F 



