﻿332 CROSSOPTERYGII. 



1860. Gljiptolepis leptopterus, C. H. Pander, Saurodipt., Dendrodont. 



Sec. devon. Syst. p. 62, pi. vii. tigs. 4-9. 

 1888. Glyptolepis leptopterus, R. H. Traquair, Geol. Mag. [3] vol. v. 



p. 513. 



Type. Portions of fishes ; British Museum. 



The type species of Glyptolepis, attaining a maximum length of 

 about OS. Head and opercular apparatus occupying somewhat 

 less than one-quarter of the total length. Pectoral fins very long, 

 the distal extremity, when adpressed to the trunk, reaching beyond 

 the origin of the pelvic pair ; pelvic fins large, arising midway 

 between the extremity of the snout and of the tail ; first dorsal fin 

 relatively small ; second dorsal and anal equal in size, short and deep, 

 directly opposed to each other; [caudal lobe apparently not excessively 

 produced]. Scales externally ornamented with well-spaced, delicate, 

 irregular antero-posterior ridges, often interrupted, sometimes 

 bifurcating, and with fine scattered wrinkles in the interspaces; 

 the ridges continued upon the overlapped portion of the scale by 

 short, radiating lines of tubercles. 



Form. Sf Log. Lower Old Red Sandstone : Nairnshire, Banffshire, 

 Cromarty, and Orkney. 1 



(i.) Lethen Bar, Nairnshire. 



P. 538, P. 3287. The first of the type specimens, being an imperfect 

 head, ventral aspect, in counterpart, figured by Agassiz, 

 torn. cit. pi. xx. figs. 1, 4. In addition to the pair of 

 jugular plates noted by Agassiz, two of the laterals of 

 the right side appear to be distinct. 



Egerton Sf Enniskillen Colls. 



P. 539. Portions of head and anterior half of abdominal region of 

 trunk, figured among the type specimens by Agassiz, 

 torn. cit. pi. xx. fig. 5. The tuber dilations of the head- 

 bones and the ridge-ornament of the scales are only faintly 

 indicated. Egerton Coll. 



P. 542, P. 3289. Imperfectly preserved abdominal region, with one 

 pectoral and portions of the pelvic fins, in counterpart, 

 figured among the type specimens by Agassiz, torn. cit. 

 pi. xxi. fig. 2. The acutely lobate pectoral fin is identified 

 with the pelvic by Agassiz, while the pelvic is named first 

 anal. Egerton Sf Enniskillen Colls. 



1 An indeterminable scale from the Devonian of Eussia is also assigned to 

 this species by Agassiz, Poiss. Poss. V. G. E. p. 139, pi. xxxi. a. fig. 24. 



