﻿CXELACANTHID^:. 405 



37956. Crushed specimen showing part of the terminal caudal fin ; 

 Airdrie, Lanarkshire. Purchased, 1863. 



21464. Small individual in counterpart ; Carluke. 



Purchased, 1847. 



41197. Fragmentary remains of small individual ; Low Main Seam, 



Newsham, Newcastle-upon-Tyne. Purchased, 1868. 



21952. Detached head, much crushed, inferior aspect; Carluke. 



Purchased, 1847. 



P. 751. Pterygo-suspensorium; Lowmoor, Yorkshire. Egerton Coll. 



P. 3333. Pterygo-suspensorium ; Lowmoor. Ennislcillen Coll. 



The following specimens are regarded as pertaining to an un- 

 described species by T. M. Hall, Geol. Mag. [2] vol. iii. (1877), 

 p. 410. The only differences from the typical C. elegans, however, 

 seem to be due to the circumstances of fossilization : — 



P. 5379, P. 6286. Pine specimen, in counterpart, discovered by W. 

 Porter, Esq., in a bed of nodules, of the Culm-Measures, 

 near Instow. One side of the split nodule is shown, of 

 the natural size, in PI. XIV. fig. 1 2, some bones of the head 

 and opercular apparatus being introduced from the opposite 

 side. The pectoral fins are almost entirely wanting, and the 

 ventral portion of the abdominal region is partly displaced 

 by crushing. The head is also imperfectly preserved ; 

 and an irregular ferruginous mass appears to indicate the 

 position and extent of the air-bladder. One of the jugular 

 plates (ju.) is displaced beneath the articulo-angular 

 bone (d.) and exhibits a remarkably acuminate anterior 

 extremity. There is evidence of two or three ornamented 

 cheek-plates (a?.) behind the eye ; and the impression of a 

 narrow bone forms the lower boundary of the orbit. The 

 triangular operculum (op.), with its fine ornamentation, 

 seems to be completely preserved as an impression ; and 

 there are traces behind this of the pectoral arch. The 

 characters of the fins and squamation, so far as recog- 

 nizable, are noted in the specific diagnosis. The scales 

 seem to occur merely as impressions, and those of the 

 flank (fig. 2 a) thus appear to be marked with extremely 

 delicate convergent lines (the infilling of the fissures 

 between the original ridged ornament), which meet in a 

 posterior reticulation. 

 Purchased, 1886, and presented by W. Porter, Esq., 1890. 



