﻿468 ACTIXOPTERYGII. 



(i.) of few feeble striae close to' and parallel with the anterior and 

 inferior borders, and (ii.) about four or five horizontal or slightly 

 oblique ridges terminating in the posterior denticulations. 



Form. fy Log. Coal-Measures : Anglesey, North Staffordshire, and 

 Lanarkshire. 



P . 608. Type scales, including the specimen figured by Egerton ; 

 Anglesey. Egerton Coll. 



Rhadinichthys (?) angustulus, Traquair. 

 1881. Rhadinichthys (?) angustulus, R. H. Traquair, Trans. Roy. Soc. 

 Edinb. vol. xxx. p. 33, pi. ii. figs. 10, 11. 



Type. Imperfect fish ; Geological Survey of Scotland, Edinburgh. 



A doubtfully determined species of very small size, much elon- 

 gated, and with a very robust caudal pedicle ; head with opercular 

 apparatus occupjung about one quarter of the total length. Dorsal 

 and anal fins similar and nearly opposite. Flank-scales somewhat 

 deeper than broad ; none posteriorly denticulated. Scale-ornament 

 consisting of few, regular, parallel transverse striae, straight and not 

 bifurcating. 



Form. Sf Log. Calciferous Sandstones (Cement-stone Group) : 

 Eskdale. 



P. 4074. Imperfect trunk. Purchased, 1883. 



A species of doubtful genus, stated to exhibit all the pectoral rays 

 articulated to their base, is named Rhadinichthys (?) fusiformis, 

 R. H. Traquair, Trans. Roy. Soc. Edinb. vol. xxx. p. 34, pi. iii. 

 figs. 1-5. The length of the head with opercular apparatus is about 

 equal to the maximum depth of the trunk, and contained nearly 

 five times in the total length. Head-bones ornamented with irregu- 

 larly wavy rugae, sometimes passing into . tubercles. Dorsal fin 

 somewhat exceeding the anal in size, and arising slightly in advance 

 of the latter. Scales well ornamented with delicate striae, the 

 majority of which are transverse, more or less oblique, and terminate 

 in denticulations of the hinder border. The following specimens 

 are preserved in the Collection : — 



P. 4073. Eish wanting the greater part of the head and paired fins, 

 the trunk measuring 0*058 from the clavicle to the base 

 of the upper caudal lobe ; Calciferous Sandstones (Cement- 

 stone Group), Eskdale, Dumfriesshire. Purchased, 1883. 



P. 4071. Smaller specimen, in counterpart, displaying squamation ; 

 Eskdale. Purchased, 1883. 



