﻿LEPIDOSIRENID.E. 267 



P. 5012. Dental plate in matrix. 



Presented by John Edward Lee, Esq., 1885. 



(ii.) Lower dental plates. 

 P. 4438 b. Plaster casts of four specimens, figured by Miall, op. cit. 

 pi. ii. figs. 1, 6, 8, pi. iii. fig. 1 ; originals in the Higgins 

 Collection. EnnisJcillen Coll. 



P. 4438 c. Plaster casts of seventeen specimens ; originals in the 

 Higgins Collection. Enniskillen Coll. 



23153 a, 24840. Two specimens, the first doubtfully of the lower 

 jaw. Purchased, 1849-50. 



28280 a, 28495 a, 28541, 28858. Five specimens. 



Purchased, 1853-54. 



34984-5. Two specimens, one much abraded. Purchased, 1860. 



35005, 35008, 36387 a. Five specimens. Purchased, 1860, 1862. 



41287 a. Two specimens. Purchased, 1869. 



42721 a. Three dental plates. 



Presented by H. N. Moseley, Esq., 1871. 



P. 344. Dental plate in matrix, with spine of Nemacanthus. 



Purchased, 1881. 



P. 761. Sixteen dental plates and fragments, mostly mandibular. 



Egerton Coll, 



P. 3394. Eight specimens. EnnisJcillen Coll. 



Ceratodus parvus, Agassiz. 



1838. Ceratodus parvus, L. Agassiz, Poiss. Foss. vol. iii. p. 132, pi. xx. 



fig. 1. 

 (?) 1838. Ceratodus obtusus, L. Agassiz ; ibid. p. 134, pi. xix. fig. 20. 



[Dental plate ; British Museum.] 

 1878. Ceratodus parvus, L. C. Miall, Monogr. Siren. & Crossopt. 



Ganoids (Mon. Palaeontogr. Soc), p. 29, pi. v. figs. 3, 4, 6- 



10. 

 (?) 1878. [Ceratodus obtusus], L. C. Miall, ibid. p. 30. 



Type. Imperfect dental plate ; Bristol Museum. 



A species evidently closely allied to C. latissimus, but only attain- 

 ing about half the size of the latter, and with dental plates more 

 constant in form. Dental plates triangular, the inner margin being 

 sharply angulated opposite, or nearly opposite, the second denticle. 

 Denticles usually four in the mandibular dental plates, five in the 



