454 
ACTIXOPTERYOIT. 
P. 3403. Head and much distorted trunk, ventral aspect. The jaws 
and branchiostegal rays are well shown, and are described 
and figured by Traquair, loc. cit. (1875), p. 246, pi. xvii. 
fig. 1. Enniskillen Coll. 
41725, P. 5597. Imperfect head and abdominal region, ventral 
aspect, in counterpart. The left maxilla, the mandible, 
branchiostegal rays, infraclavicles, and the left pectoral 
fin are well shown; and of these the branchiostegal rays 
and infraclavicles are noticed by Traquair, loc. cit. (1875), 
pp. 244, 246. Purchased, 1869, 1888. 
28867. Small head and trunk, much crushed, wanting the caudal 
fin and part of the dorsal and anal fins. 
Purchased, 1854. 
P. 739, P. 1370, P. 1370 a. Two imperfect heads, two portions of 
head and trunk, and an example of the caudal region. 
The first specimen is seen in impression, showing distinct 
traces of the row of minute teeth in the mandible, and 
exhibiting the striated, partly rugose, and tuberculated 
character of the facial bones and the clavicle. The cir- 
cumorbital ring, so far as preserved, shows a radiated 
ornamentation. In the second example of the head, the 
maxilla and the narrow cheek-plate above it are well 
shown. Egerton Coll. 
21547. Trunk having all the fins well preserved. The total length 
of the base of the dorsal fin is about 0*026, while that of 
the anal is not less than 0*04, and the length of the front- 
margin of each is approximately 0*03. The anterior 
border of the pectoral fins also measures 0*03 in length, 
and that of the pelvic fins about 0*015. The base-line of 
the pelvic fins is much extended, and the caudal fin is 
distinctly inequilobate. 
Presented by Norman McLeod, Esq., 1847. 
21547 a. Larger and more imperfectly preserved caudal region. 
Presented by Norman McLeod , Esq., 1847. 
(iv.) Cromarty. 
19805. Remains of small head and trunk, showing jaws. 
Purchased , 1845. 
