ENCHODONTID^. 
209 
culam {op.) exhibits its thickened inner rib, and is suffi¬ 
ciently transparent to admit of the radiating lines of fine 
tubercles on its outer face being seen. The suboperculum 
{s.op.) is imperfectly preserved only on the left side; its 
tubercular ornament is arranged in almost vertically 
directed lines. The dorsal scutes {cl.s.) are exposed from 
within, and immediately behind the left operculum the 
inner face of the triangular post-clavicular plate (p.cl.) is 
also shown. One pelvic fin (plv.) is preserved behind. 
The other remains are too imperfect for description. 
Lewis Coll. 
P. 72. Another vertically crushed specimen, more imperfect. The 
dermal scutes of the lateral line are well shown. 
Lewis Coll. 
P. 1904. Smaller imperfect vertically crushed head and abdominal 
region. Egerton Coll. 
49479-82. Pour specimens in side view, the second and third 
displaying the caudal fin, the fourth wanting it. All 
except the first exhibit the slender branchiostegal rays, 
while the third and fourth show the large anterior tooth 
on the thickened palatine bone. Lewis Coll. 
P. 74. Another fine specimen in side view, displaying one of the 
pelvic fins. The foremost ray of this fin is much the 
stoutest, closely articulated but not divided distally; it is 
also the shortest ray, and the others, to the number of 
about seven, gradually increase in length. Lewis Coll. 
49555. Smaller fish in side view, displaying the dorsal and caudal 
fins. There are remains of a swallowed fish in the 
abdomen. Lewis Coll. 
P. 276. Imperfect fish in side view, displaying the scutes and 
external ornamentation. 
Trcinsferred from Mus. Practical Geology, 1880. 
P. 73. A very fragmentary specimen, in counterpart. Remains of 
the branchial arches, hyoids, and branchiostegal rays are 
displaced below the pectoral region. Lewis Coll. 
39235. Smaller imperfect specimen, with a fragment. 
PAKT IV. 
Tristram Coll, 
It 
