﻿PLATYSOMATTD^J. 545 



P. 1597, P. 4425. Imperfect head and trunk, without fins, in 

 counterpart, Eisleben. Egerton § EnnisMllen Colls. 



P. 3492. Head and well-preserved portion of squamation, labelled 

 by Agassiz ; Eisleben. Enniskillen Coll. 



P. 1598, P. 3493. Nodule with imperfect head and trunk, doubt- 

 fully of this species : Ilmenau, Thuringia. 



Egerton <$f Enniskillen Colls. 



(ii.) Marl Slate. 



39160, P. 556. Specimen of the so-called P. striatus, in counter- 

 part, figured in King's ' Permian Fossils,' pi. xxvii. ; Ferry 

 Hill, Durham. Some of the robust styliform teeth are 

 well shown in the upper jaw ; and the tuberculated orna- 

 ment of the scales at the dorsal and ventral borders of 

 the abdominal region is also conspicuous. 



BowerbanJc § Egerton Colls. 



P. 3494. Similar specimen with more imperfect head, chiefly shown 

 as an impression upon the matrix ; Ferry Hill. 



Enniskillen Coll. 



P. 3498. Small fish, 0-19 in length, with imperfect dorsal border, 

 and wanting the dorsal and pelvic fins; Midderidge, 

 Durham. Enniskillen Coll. 



P. 3498 a. Smaller imperfect trunk, wanting the dorsal and paired 

 fins ; Midderidge. Enniskillen Coll. 



P. 1607. Caudal region, labelled Platysomus maerurus by Egerton; 

 Midderidge. Egerton Coll. 



P. 1606. Portion of a very small trunk, showing the pelvic fins in 

 position, with the imperfect anal fin, the hinder portion 

 of the dorsal, and the base of the caudal ; Midderidge. 

 The specimen is represented, of the natural size, in 

 PI. XY. fig. 5, Egerton Coll. 



The following species is founded upon an imperfect head and 

 trunk, and is evidently closely allied to P. gibbosus : — 



Platysomus biarmicus, E. von Eichwald, Bull. Soc. Imp. Nat. 

 Moscou, vol. xxx. (1857), pt. ii. p. 348, and Leth. Eossica, 

 vol. i. (1860), p. 1591, pi. lvi. fig. 7.— Permian ; Kargala, 

 Govt, of Orenburg, Russia. [University of Moscow.] 



pakt ii. 2n 



