P.VL.E0XISC1D.E. 
463 
Rhadinichthys carinatus (Agassiz). 
1835. Palceoniscus carinatus, L. Agassiz, Poiss. Foss. vol. ii. pt. i. 
p. 104, pi. iv. c , figs. 1, 2. 
1877. Rhadinichthys geikiei, R. H. Traquair, Proc. Roy. Soc. Edinb. 
vol. ix. p. 438. [Geological Survey of Scotland.j 
, 1877. Rhadinichthys carinatus, R. H. Traquair, ibid. p. 441, and Quart. 
Journ. Geol. Soc. vol. xxxiii. p. 559. 
1890. Rhadinichthys carinatus, R. H. Traquair, Proc. Roy. Soc. Edinb. 
vol. xvii. pp. 391, 397. 
Type. Imperfect fisb ; Edinburgh Museum. 
Trunk slender, the head occupying somewhat more than one- 
fifth of the total length to the bifurcation of the caudal fin. Head- 
bones ornamented with sharp, delicate, wavy striae. Median fins 
relatively large, the dorsal arising slightly in advance of the anal, 
and the latter as long as deep; fin-rays smooth. Scales of flank 
large, almost equilateral, a few short oblique striae extending from 
some of the denticulations of the hinder border, and others, still 
more delicate, parallel with the inferior border. 
Form. Sf Loc. Calciferous Sandstones: Midlothian and Fifeshire. 
P. 844. Fish imperfectly preserved in nodule; Marche, near Edin¬ 
burgh. Egerton Coll. 
42082. Head and anterior abdominal region : Anstruther, Fifeshire. 
Purchased , 1870. 
Rhadinichthys brevis* Traquair. 
1877. Rhadinichthys brevis, R. H. Traquair, Proc. Roy. Soc. Edinb. 
vol. ix. p. 440. 
Type. Fish; collection of Hr. R. H. Traquair. 
A species of short and stout proportions, attaining a length of 
about 0-12. Bones of cranial roof ornamented with vermiculating 
flattened rugae, facial and opercular bones with finer striae. Paired 
fins relatively small; median fins well developed, the dorsal and 
anal almost completely opposed. Scales of flank nearly equilateral ; 
posterior border exhibiting five or six prominent oblique denticu¬ 
lations. Scale-ornament consisting of few, feeble, oblique striae, 
more or less irregularly arranged. 
Form. Sf Loc. Calciferous Sandstones : Midlothian. ( yu/6x^u>' T. 
P. 845. Specimen wanting the caudal fin ; Wardie, near Edinburgh. 
Egerton Coll. 
