32 CATALOGUE OF TYPES AND FIGURED SPECIMENS 



Onchus, Sp., Egerton. 



1857. Onclms, sp. Egerton, Quart, Journ. Geol. Soc, xiii., 



p. 288, pi. X., figs, ya, 76, 

 1888. Tail spine of Pterygohis {?) Etheridge, Cat. Brit. Pal. Foss., p. 128. 



A strongly curved longitudinally ribbed spine, armed 

 with denticles along its posterior border. 



Railway Cutting, Ludlow, Shropshire. 



Transition Beds, Coll. Lighthody. 



Myriolepis Hibemica, sp, nov,- 



Type. — Of the fossil fish now to be described I know 

 only two specimens, of which one is in the Manchester 

 Museum, Owens College, the other in the Museum of 

 Practical Geology, Jermyn Street, London, Both are from 

 the Coal Measures, Jarrow Colliery, Co. Kilkenny, Ireland, 



The Manchester specimen is imperfect, being broken 

 off about half an inch behind the anal fin ; the dorsal fin 

 is also deficient, but its position is indicated by the subjacent 

 fin-supports. The pectoral, ventral, and anal fins are 

 present. 



The measurements are as follows : — 



Entire length of the specimen, so far as preserved ... 7^ in. (1875 cm.) 



From tip of snout to origin of pectoral fin 2 „ (5 cm.) 



M n ,, „ ventral „ 4 „ (10 cm.) 



„ beginning of pectoral to beginning of ventral fin 2J „ (57 cm.) 



„ M ventral „ „ anal „ i^ „ ( 4-8 cm.) 



Depth of body at origin of ventral fin 3 „ (7-3 cm.) 



Length of head to posterior margin of gill cover 2J „ (10 cm.) 



The head shows scarcely any detail, though it is at 

 once apparent that its structure was typically Palaeoniscoid, 

 with anteriorly placed orbit, oblique suspensorium, and wide 

 gape. Its length is contained 3^ times in the total up to 

 the tail pedicle, where the specimen is broken off. 



-The following description and notes are from the pen of Dr. 

 Traquair, FR.S. 



