508 
ACTIXOPTERYGII. 
Acrolepis ortholepis, Traquair. 
1884. Flonichthys ortholepis, II. II. Traquair, Geol. Mag-. [3] vol. i. 
p. 10. 
1890. Acrolepis ortholepis, R. H. Traquair, Proe. Roy. Soc. Edinb. 
vol. xvii. p. 398, and Auu. 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,/. 
(F) 1877-78. Palatoniscus 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. Eragment 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, df 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]. 
Typ>e. Group of scales ; British Museum. 
This provisional name is suggested for the specimens mentioned 
