﻿PHANEROPLEURID.K. 249 



P. 198. Impression of small dental plate with five coarsely tuber- 

 culated, radiating ridges ; Upper Old Red Sandstone, 

 Parlow, Shropshire. Weaver- Jones Coll. 



Genus URONEMUS, Agassiz. 

 [Poiss. Poss. vol. ii. pt. ii. 1844, p. 178.] 

 Syn. Oanopristodus, Geol. Mag. [2] vol. viii. 1881, p. 37. 



Body somewhat laterally compressed, covered with very thin 

 scales of moderate size. Notochord persistent. Marginal teeth 

 laterally compressed ; dental plates with series of well-separated, 

 conical tubercles. Paired fins acutely lobate ; dorsal fin single, 

 arising in advance of the pelvic pair, continuous with the caudal ; 

 no separate anal fin. 



Uronemus lobatus, Traquair. 



1844. Uronemus lobatus, L. Agassiz, Poiss. Foss. vol. ii. pt. ii. p. 178 



(undefined). 

 1871. Phaneropleuron elegans, R. H. Traquair, Geol. Mag. vol. viii. 



p. 534. [Name subsequently withdrawn.] 

 1873. Uronemus lobatus, R. H. Traquair, Journ. Roy. Geol. Soc. 



Ireland, n. s. vol. hi. p. 41, pi. v. 



Type. Imperfect fish ; British Museum. 



The type species, of small size, attaining a maximum length of 

 about 0'2. Trunk narrow and elongated, at least five times as 

 long as the head with the opercular apparatus ; tail produced and 

 acutely pointed. Marginal teeth in the form of low, laterally 

 compressed, smooth-edged cones, confluent at their bases and 

 brilliantly ganoid. Dorsal fin arising a very short distance behind 

 the head. Scales very thin, marked with faint longitudinal or 

 radiating striae. 



Form, fy Loc. Calciferous Sandstones : Burdiehouse, near Edin- 

 burgh. 



P. 2273. Caudal region and posterior portion of the abdominal 

 region, being the type specimen noticed by Traquair, 1873. 



Egerton Coll. 



P. 3276. Imperfect fish, described by Traquair, ibid. p. 47. 



Ennishillen ColL 



