﻿503 ACTINOPTERYGII. 



Acrolepis ortholepis, Traquair. 



1884. ElonicMhys ortholepis, R. II. Traquair, Geol. Mag. [3] vol. i. 



p. 10. 

 1890. Acrolepis ortholepis, R. II. Traquair, Proc. Roy. Soc. Edinb. 



vol. xvii. p. 398, and Ann. Mag. Nat. Hist. [6] vol. vi. p. 492. 



Type. Immature fish ; British Museum. 



A species of moderate size. Trunk robust ; head with opercular 

 apparatus contained about four and a half times in the total length. 

 Scales of flank deeper than broad, all coarsely ornamented, none 

 posteriorly serrated. Scale-ornament consisting of thick ridges 

 parallel with the superior, inferior, and posterior borders, meeting 

 at acute angles on a strong diagonal ridge, which extends down- 

 wards and backwards across the scale to the postero-inferior 

 angle. 



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

 dale, Dumfriesshire. 



P. 4081. Type specimen, being a young individual 0*32 in length, 

 imperfectly preserved in counterpart. Purchased, 1883. 



Acrolepis (?) hortonensis, Dawson. 



1868. Acrolepis hortonensis, J. W. Dawson, Acadian Geology, ed. 2, 



p. 254, fig. 77, e,/. 

 (?) 1877-78. Palceoniscus jacksoni, J. W. Dawson, Canadian Nat. n. s. 



vol. viii. p. 339, and Acadian Geology, Suppl. p. 101. [Imperfect 



trunk ; Peter Redpath Museum, Montreal.] 



Type. Fragment of jaw and detached scales ; Peter Redpath 

 Museum, Montreal. 



A species provisionally assigned to this genus, and known only 

 by fragments. Laniary teeth relatively very large and broad. 

 Scales sculptured with numerous oblique ridges. 



Form. <$f Loc. Lower Carboniferous : Nova Scotia. 



P. 6218. Guttapercha cast of type specimen, a fragment of man- 

 dible ; Horton Bluff. 



Presented by Sir J. William Dawson, 1890. 



Acrolepis (?) digitata, sp. nov. 

 [Plate XV. fig. 4]. 



Type. Group of scales ; British Museum. 



This provisional name is suggested for the specimens mentioned 





