﻿PALJSONISCID^. 461 



P. 3447 a, b, P. 4333. A much-crushed specimen wanting the end 

 of the tail, portions of head and abdominal region, in 

 counterpart, and two imperfect examples of the caudal 

 region : Deep-mine Ironstone Shale, Longton. 



Enniskillen Coll. 



36899. Imperfect head displaying some of the teeth, and a few 

 anterior flank-scales ; Longton. Purchased, 1862. 



39918. Imperfect small individual displaying some of the branchio- 

 stegal rays ; Longton. Purchased, 1866. 



Cycloptychius concentricus, Traquair. 



1881. Cycloptychius concentricus, ~R. H. Traquair, Trans. Roy. Soc. 

 Edinb. vol. xxx. p. 37, pi. ii. figs. 17-20. 



Type. Pishes ; Geological Survey of Scotland. 



Form and proportions as in the type species ; facial bones and 

 opercular apparatus striated, the mandible being slender and taper- 

 ing, with a narrow band of tuberculations along its upper margin, 

 and the striae below arranged diagonally. Scales ornamented with 

 few large rounded ridges parallel with the anterior, inferior, and 

 posterior borders ; principal scales of flank slightly more than one 

 and a half times as deep as broad, with much rounded postero- 

 inferior angle ; scales near dorsal margin almost equilateral, with 

 only one or two concentric ridges, the inner area being marked with 

 few short diagonal ridges. 



Form. $ Loc. Calciferous Sandstones (Cement-stone Group) : 

 Eskdale, Dumfriesshire. 



P. 4063. Somewhat elongated individual, in counterpart, showing 

 all the fins. Purchased, 1883. 



P. 4064-66. Three more imperfectly preserved specimens, the first 

 in counterpart, and all displaying parts of the squamation. 



Purchased, 1883. 



Genus RHADINICHTHYS, Traquair. 

 [Quart. Journ. Geol. Soc. vol. xxxiii. 1877, p. 559.] 



Trunk elegantly fusiform, more or less elongated. Mandibular 

 suspensorium very oblique ; teeth in two series, a small outer row 

 and larger, incurved, conical laniaries, well spaced, within. Pins 



