384 
ACTIXOPTERYGII. 
P. 3719. Another large trunk with fragmentary remains of the 
head ; Ohmden. Enniskillen Coll. 
P. 3707. Imperfect fish, ventro-lateral aspect; Ohmden. 
Enniskillen Coll. 
P. 2045. Head and a well-preserved portion of the abdominal 
region of a large fish ; Ohmden. About 35 supports can 
be counted in the dorsal fin. Eger ton Coll. 
P. 3719 a. More imperfect head and portion of abdominal region of 
another fish about O’65 in length; Ohmden. 
Enniskillen Coll. 
32433. Head and opercular apparatus 0*185 in length ; Curcy, 
Normandy, The proportions of the cranial roof are 
obtained from this specimen. Tesson Coll. 
32432, 32436. Two fragmentary heads ; Curcy. Tesson Coll. 
P. 7570. Imperfect head showing the extremity of the snout, with 
part of the right pectoral fin and some anterior scales ; 
Ilminster, Somersetshire. 
Pachycornms acutirostris, Agassiz. 
1844. Pachycormus acutirostris, L. Agassiz, Poiss. Foss. vol. ii. pt. ii. 
p. 114. 
Type. Imperfect head. 
An imperfectly-known species of moderate or large size. Head 
closely similar to that of P. macropterus, hut with a slightly shorter 
snout; operculum triangular, with somewhat truncated upper 
extremity, nearly as broad as deep; branchiostegal rays about 45-50 
in number. Scales of moderate size, ornamented with a feeble 
rugosity. 
Form. Log. Upper Lias : Yorkshire. 
P. 7571. Fragmentary remains of fish about 0*55 in length, ventral 
aspect; Whitby. Purchased. 
P. 3705 C. Anterior half of a similar specimen, displaying the left 
branchiostegal rays ; Whitby. Enniskillen Coll. 
P. 2038, P. 3706. Much fractured remains of the head and abdo¬ 
minal region of a very large fish, in counterpart; Whitby. 
Egerton Enniskillen Colls . 
P. 884 a-e. Five heads in various states of preservation; Whitby. 
Egerton Coll. 
