468 
ACTIXOPTEEYGII. 
(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. 4f Log. Coal-Measures: Anglesey, North Staffordshire, and 
Lanarkshire. JV. 
P. 608. Type scales, including the specimen figured by Egerton; 
Anglesey. Egerton Coll. 
Rhadinichthys (?) angnstmlus, Traquair. 
1881. Rhadinichthys (?) angustulus, E. H. Traquair, Trans. Eoy. Soc. 
Edinb. vol. xxx. p. 33, pi. ii. figs. 10, 11. . D 
/&/-Z. . — ^ rtfU .3<rC±,E . F >■ 
'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 occupying about one quarter of the total length. Dorsal 
and anal fins similar and nearly opposite. Elank-scales somewhat 
deeper than broad ; none posteriorly denticulated. Scale-ornament 
consisting of few, regular, parallel transverse striae, straight and not 
bifurcating. 
Form. 
Eskdale. 
Loc. Calciferous Sandstones (Cement-stone Group): 
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 , 
E. H. Traquair, Trans. Eoy. 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, 
/PeZory/p the trunk measuring 0-058 from the clavicle to the base 
cy " 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. 
