32 
ACTINOPTERYGrII. 
described and figured by R. H. Traquair, loc. cit. p. 251, 
fig. 2. The outline-illustration is copied, of slightly more 
than one-half the natural size, in the accompanying fig. 6, 
and explained by the lettering. The transverse cleft in the 
pectoral arch, though appearing as if a suture and inter¬ 
preted as such by Traquair, is proved by other specimens 
to be accidental ; the clavicle thus exhibits a large in¬ 
ferior limb. Egerton Coll. 
P. 7398. Head and opercular apparatus, exposed from the left side, 
the aspect being partly lateral and partly ventral. Many 
of the bones are well exhibited, and an elongated element 
between the inferior extremity of the hyomandibular and 
the quadrate region is especially noteworthy; this may be 
an ossified symplectic, as remarked by Traquair, loc. cit. 
p. 250. Purchased. 
P. 3363-4, P. 3370. Three examples of the head and pectoral 
arch, with remains of the pectoral fins, the first shown 
from the dorsal aspect, the others from the lateral aspect. 
The clavicle in each exhibits a large inferior limb and an 
extensive inner laminar expansion ; and the second fossil 
also seems to show, from its external ornamented aspect, 
the small infraclavicle. Enniskillen Coll . 
P. 3369, P. 3869 a, P. 4341. Three small slabs of Lias with frag¬ 
mentary remains of the head and pectoral arch. The 
first and third specimens exhibit, among other bones, 
the maxilla, palatiue (or ectopterygoid), suborbital, and 
hyomandibular ; the second specimen displays the clavicle 
and supraclavicle. Enniskillen Coll. 
P. 2261 a-c. Three fragmentary small examples of the head and 
pectoral arch, the first displaying the operculum, among 
other bones. Egerton Coll. 
P. 2261 d. Small head and right pectoral fin. The maxilla, jugal, 
palatine (ectopterygoid), and inner pterygoid are well dis¬ 
played. Egerton Coll. 
39494. Remains of small head and pectoral fins. Purchased , 1865. 
P. 4341 a. Remains of pectoral arch and fins. Enniskillen Coll. 
P. 4341 b. Remains of opercular apparatus and pectoral arch of a 
small fish, displaying both clavicles from the visceral 
aspect, and the infraclavicle from the same aspect on the 
