42 
ACTINOPTERYGIT. 
P. 9016. Left ramus of mandible, sho\Ying articulo-augular bone : 
Lower Chalk (Schloenbachia Zone), Glynde, Sussex. 
Purchased, 1899. 
P. 5656. A fine right dentary; Lower Chalk, Burham, Kent. 
Thirteen teeth are preserved, with spaces for about ten 
others. Harford Coll. 
47236. Anterior end of similar right dentary, being the ty])e 
specimen of the species, described as reptilian by Mason, 
loc. cit. 1869 ; Lower Chalk, Lyddon Spout, Folkestone. 
The oral margin of the bone is partly broken away from 
the bases of the teeth. Gardner Coll. 
33256. Imperfect dentaries associated with part of the left maxilla, 
and fragments of the inner tooth-bearing bones, doubt¬ 
fully of this species ; Burham. Taylor Coll. 
P. 5652. Imperfect oral border of the left dentary, probably of this 
species ; Lower Chalk, Cuxton, Kent. Harford Coll. 
4068. Yertebral centrum probably of this species, figured by Agassiz, 
loc. cit. pi. XXV h. figs. 6, 7 ; Chalk, Lewes. Mantell Coll. 
P. 1808 a. Two vertebral centra ; Chalk, Sussex. Egerton Coll. 
P. 4506. Group of imperfect vertebrae ; English Chalk. 
EnnisTcillen Coll. 
P. 5658. Yertebral centra ; Lower Chalk, Kent. Harford Coll. 
Pachyrhizodus latimentum, Cope. 
1872. Pachyrhizodus latimentum, E. D. Cope, Proc. Amer. Phil, Soc. 
vol. xii. p. 346. 
1872. Pachyrhizodus kingii, E. D. Cope, ibid. p. 846. [Portion of 
maxilla.] 
1875. Pachyrhizodus Mngii, E. D. Cope, Yert. Cret. Form. AYest (Rep. 
U.S. Geol. Surv. Territ. vol. ii. 1875), p. 223, pi. xlvi. fig. 11. 
1875. Pachyrhizodus latimentum, E. D. Cope, ibid. p. 223, pi. 1. hg. 5, 
pi. li. figs. 1-7. 
1900. Pachyrhizodus latimentum, F. B. Loomis, Palaeontogr. vol. xlvi. 
p. 263, pi. xxvi. figs. 7, 8. 
Type. Mandible, &c.^‘ ^ • 
A species as large as P. gardneri, with nearly similar mandible 
but more numerous and relatively smaller teeth. Teeth not com- 
