﻿OSTKOLEPTD^E. 369 



1-10, 15-21, pi. v. figs. 1-11 (probably in part Thurdus macrolepi- 



1888. Osteolepis macrolepidotus, R. H. Traquair, Geol. Mag. [3] vol. v. 



p. 515. 

 1890. Osteolepis macrolepidotus, It. H. Traquair, Ann. Mag. Nat. Hist. 



[6] vol. vi. p. 484. 



Type. Imperfect fishes : olim T. S. Traill Collection. 



The type species, attaining a maximum length of about 0*3. 

 Head with opercular apparatus contained about four and a half 

 times in the total length ; parietal region about two thirds as long 

 as the fronto-ethmoidal ; jaws much elongated. Pelvic fins situated 

 about halfway between the hinder margin of the operculum and 

 the extremity of the tail ; dorsal fins higher than long, separated 

 by an interspace equal to twice the length of the base of the second 

 dorsal, which is somewhat larger than the first dorsal and similar 

 to the anal. Scales large. 



Form. $ Log. Lower Old Red Sandstone : Orkney, Caithness, 

 Ross-shire, Cromarty, Nairnshire, and Banffshire \ 



(i.) Orkney Isles (typical 0. macrolepidotus). 



P. 817. Small fish, 0-17 in length, showing the fins; Belyacreugh. 



Egerton Coll. 



P. 3300-1. Three similar specimens, the third exhibiting small, 

 slender, well-spaced teeth in the mandible. 



Enniskillen Coll. 



P. 4604, P. 4606. Four imperfect specimens, one wanting the tail. 



Enniskillen Coll. 



41136. Specimen displaying the large scales of the abdominal 

 region. Purchased, 1868. 



39195-96. Msh equal in size to the preceding, exhibiting the 

 ventral aspect, and a smaller, very imperfect specimen, 

 lateral aspect ; Skaill. Purchased, 1865. 



36185. Small fish, showing fins, mostly obscure. Purchased, 1861. 



39253. Small crushed specimen (O. brevis, M'Coy) ; Stromness. 



Purchased, 1865. 

 36182-83. Similar fish, obscurely preserved, in counterpart. 



Purchased, 1861. 



1 Scales from the Devonian of St. Petersburg are doubtfully referred to the 

 so-called O. major by Agassiz, Poiss. Foss. V. GL E. (1845), p. 138, pi. xxviii. a. 

 fig. A, pi. xxxi. a. figs. 8-13. Other fragments of bones and scales from the 

 Devonian of Eussia are also ascribed to this species by E. von Eichwald, Leth. 

 Eossica, vol. i. (1860), p. 1552. 



PABT II. 2 B 



