PHAXERO]?LEUKID.E. 
249 
P. 198. Impression of small dental plate with five coarsely tuber- 
culated, radiating ridges ; Upper Old lied Sandstone, 
Farlow, Shropshire. Weaver-J ones Coll. 
Genus URONEMUS, Agassiz. 
[Poiss. Foss. vol. ii. pt. ii. 1844, p. 178.] 
Syn. Ganopristodus,J&e ol. Mag. [2] vol. viii. 1881, p. 87. ^ 
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. 
Uronemns lobatus, Traquair. 
1844. TJronemus hiatus, L. Agassiz, Poiss. Foss. vol. ii. pt. n. p. 178 
(undefined). 
1871. Phaneropleuron elegans, R. H. Traquair, Geol. Mag. vol. viii. 
p. 534. [Name subsequently withdrawn.] 
1873. Uronemus hiatus, R. H. Traquair, Journ. Roy. Geol. Soc. 
Ireland, n. s. vol. iii. p. 41, pi. v. 
Type. Imperfect fish; British Museum. 
The type species, of small size, attaining a maximum length of 
about 02. 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. § Log. Calciferous Sandstones : Burdiehouse, near Edin¬ 
burgh. 
P. 2273. Caudal region and posterior portion of the abdominal 
region, being the type specimen noticed bj Traquan, 18/3. 
Fgerton Coll. 
P. 3276. Imperfect fish, described by Traquair, Hid. p. 4/. 
Enniskillen Coll. 
