518 
ACTINOPTERYGII. 
description; but it may be added that the ridge-scales 
upon the caudal lobe appear to have been remarkably 
small. Egerton Coll. 
P. 3487. Small imperfectly preserved individual, 0*26 in length; 
Lyme Regis. The hindermost quarter of the alveolar 
border of the maxilla inclines sharply downwards and 
backwards, and bears very slender large teeth directed 
forwards. The cranial roof is shown to have been closelv 
tuberculated, and there are faint indications of minute, 
sparsely arranged tubercles on the operculum and sub¬ 
operculum. Some of the neural and haemal arches are 
indicated, and the notochord does not appear to have been 
even in part surrounded by hypocentra and pleurocentra. 
The ridge-scales of the upper caudal lobe are well shown, 
very delicate, narrow, and attenuated. Enniskillen Coll. 
P. 3487 a. Imperfect fish, 0*37 in length, displaying the inferior 
aspect of the head, pectoral fins, the impression of a 
pelvic fin, and the equality of the lobes of the caudal fin ; 
Lyme Regis. Enniskillen Coll. 
P. 3487 b. Imperfect head and anterior abdominal region of a 
large fish, lateral aspect, and the extremity of the caudal 
region perhaps of the same individual, but, if so, from 
the counterpart slab; Lyme Regis. The clavicle and 
. supraclavicle are observed, ornamented with irregular 
short striae aud coarser reticulating rugae ; there are small 
fulcra on the anterior border of the inferior lobe of the 
caudal fin ; and several other characters mentioned above 
are confirmed. Enniskillen Coll. 
P. 3487 C. Head and abdominal region, left ventro-lateral aspect, 
displaying the dentition, opercular apparatus, and paired 
fins, with a fragment of the anal fin ; Lyme Regis. Only 
the hinder shortest rays of the pectoral fin are articulated, 
but all the pelvic fin-rays exhibit distant articulations. 
The suboperculum seems to be nearly equal to the oper¬ 
culum in height, and is much broader. Enniskillen Coll. 
P. 3487 d-f. Three very imperfect examples of the head and trunk. 
Enniskillen Coll. 
P. 872. Imperfect fish, ventral aspect. Egerton Coll. 
P 2025. Imperfect head, pectoral fins, and abdominal scales, ven¬ 
tral aspect ; Lyme Regis. Egerton Coll. 
