﻿PAL^EONISCIDJi:. 433 



Canobius politus, Traquair. 



1881. Canobius politus, K. H. Traquair, Trans. Roy. Soc. Edinb. 



vol. xxx. p. o3, pi. v. figs. 14-16. 

 1890. Mesopoma politum, R. II. Traquair, Anu. Mag. Nat. Hist. [0] 



vol. vi. p. 493. 



Type. Imperfect fish ; Geological Survey of Scotland. 



General form and proportions as in C. pulchellus. Cranial roof- 

 bones ornamented with coarse ruga?, more or less subdivided into 

 elongated tubercles; facial bones striated. Scales very feebly 

 ornamented with transverse, somewhat oblique ridges, in part 

 terminating at the hinder border in denticulations ; dorsal ridge- 

 scales comparatively small. 



Form. § Loc. Calciferous Sandstones (Cement-stone Group) : 

 Eskdale, Dumfriesshire. 



P. 4070. Two specimens. Purchased, 1883. 



Canobius macrocephalus (Traquair). 



1890. Rhadinichthys macrocephalus, R. H. Traquair, Proc. Roy. Soc. 



Edinb. vol. xvii. p. 398. 

 1890. Mesopoma macrocephalum, R. H. Traquair, Ann. Mag. Nat. Hist. 



[6] vol. vi. p. 493. 



Type. Fish ; collection of Dr. R. H. Traquair. 



Trunk comparatively slender, the head with opercular apparatus 

 occupying somewhat less than one quarter of the total length. 

 Head-bones striated, the stride upon the cranial roof being wavy 

 and irregular, sometimes subdivided into tubercles. Scales feebly 

 ornamented with oblique parallel ridges, terminating in denticu- 

 lations at the hinder border; dorsal ridge-scales comparatively 

 small. 



Form. Sf Log. Calciferous Sandstones ; Midlothian. 



41123. Specimen wanting the dorsal and pectoral fins ; locality 

 unknown. Bryson Coll. 



Some doubtful fragmentary specimens from the Calciferous Sand- 

 stones (Cement-stone Group) of Blackadder Water, near Dunse, 

 Berwickshire, are named Canobius obscurus, R. H. Traquair, Trans. 

 Roy. Soc. Edinb. vol. xxx. (1881), p. 68. [Geol. Survey of Scotland, 

 Edinburgh.] 



PAKT II. 2 P 



