PHOLIDOPHORIDJE. 
451 
depth of the trunk, and occupying one-fifth of the total length 
of the fish. The rugose ornament of the head and opercular bones 
very feeble and often in radiating hues ; maxilla and dentary 
marked with fine, prominent, irregular longitudinal striations. 
Fulcra minute on all fins except the caudal, on which they are 
larger. Pectoral fins with about 18 rays and larger than the pelvic 
fins, which have 14 rays and arise considerably in advance of the 
middle point of the trunk; dorsal fin with about 12 rays, directly 
opposed to the pelvic pair. Scales large and smooth, the hinder 
margin not serrated and very slightly convex ; four longitudinal 
flank-series much deeper than broad. 
Form, Loc. Lower Lias : Dorsetshire. 
All the following specimens were obtained from the neighbour¬ 
hood of Lyme Eegis :— 
25276-77. Two imperfect and distorted fishes about 0*17 in length. 
Purchased , 1850, 
28281. An equally large specimen, displaying the left lateral and 
partly ventral aspect. Purchased , 1853. 
32403. Fine specimen 0T6 in length, partly crushed and fractured 
but showing portions of all the fins. Purchased , 1857. 
38162, 39835. One smaller and one larger fish, somewhat elongated 
by crushing. In the second specimen the depth of the 
very small dorsal fin is shown. Purchased , 1864,1866. 
P. 3586 a-e. Five large and well-preserved specimens, three dis¬ 
playing the general proportions of the fish, the two others 
more distorted. The second fossil exhibits some flank- 
scales with the articulating peg as robust as described by 
Agassiz in P. becliei , and others with this peg as long and 
slender as in the so-called P. onychitis. Enniskillen Coll. 
P. 1052 a-g, P. 1051. Seven imperfect specimens, of large or 
moderate size. In the first fossil the dorsal and pelvic 
fins are displayed, the former with a few minute fulcra, 
the latter without fulcra. Egerton CoU. 
P. 3586 f. Fish about 0T55 in length. Enniskillen Coll. 
39858. A similar fish, vertically cleft and displaying the well- 
preserved squamation of both sides. The right side of 
the specimen is shown, of the natural size, in PI. XII, 
2 g 2 
