PLATYSOMATIDJE. 
545 
P. 1597, P. 4425. Imperfect head and trunk, without fins, in 
counterpart, Eisleben. Egerton § Enniskillen Colls. 
P. 3492. Head and well-preserved portion of squamation, labelled 
by Agassiz ; Eisleben. Enniskillen Coll. 
P. 1598, P. 3493. Nodule with imperfect bead and trunk, doubt¬ 
fully of this species ; Ilmenau, Thuringia. 
Egerton § Enniskillen Colls. 
(ii.) Marl Slate. 
39160, P. 556. Specimen of the so-called P. striatus , in counter¬ 
part, figured in King’s ‘ Permian Eossils,’ pi. xxvii.; Kerry 
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. 
Bowerbank § Egerton Colls. 
P. 3494. Similai specimen with more imperfect head, chiefly shown 
as an impression upon the matrix ; Kerry Hill. 
Enniskillen Coll. 
P. 3498. Small fish, 0*19 in length, with imperfect dorsal border, 
and wanting the dorsal and pelvic fins: Midderid°’e, 
Durham. Enniskillen Coll. 
P. 3498 a. Smaller imperfect trunk, wanting the dorsal and paired 
fins ; Midderidge. Enniskillen Coll. 
P. 1607. Caudal region, labelled Platysomus macrurus 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 j^ortion 
of the dorsal, and the base of the caudal: Midderidge. 
The specimen is represented, of the natural size, in 
PI. XA . 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. ^—Permian ; Kargala, 
Govt, of Orenburg, Eussia. [University of Moscow.] 
PAKX 11. 2 X 
