^\ ELLBURN : ON SOME NEW SPECIES OF FOSSIL FISH. 71 
Genus : Rhizodopsis. 
B. sauroides Williamson. 
Remains (scales, &c.) of this fish are in the collection of 
Mr. Barns, and also in that of the writer, from Pule Hill. Mr. 
Peter Whalley, of Colne, Lancashire, has also found remains 
of the fish at Antley Gate, near Colne, Lancashire. 
Family : Osteolepida?. 
Genus : Megalichtkys. 
M. Hihherti Agassiz. 
The writer has seen well-marked remains of this fish, from 
Antley Gate, Lancashire, collected by Mr. Whalley. 
Family : Ccelacanthidae. 
Genus : Codacanthus. 
C. summit i sp. no v. 
Type : Imperfect crushed fish in author's collection.* 
Description. — Of the head bones, the operculae and angular 
bone of the mandible are ornamented with ridges, which, on the 
operculum, run upwards from the inferior border in an arched 
manner parallel to the anterior and j^osterior borders of the bone, 
which borders form a broad and evenly arched outline, the 
posterior arm of the arch being slightly longer than the anterior ; 
the bone is one-third higher than broad. On the other oper- 
cular bones and on the angular bone of the mandible, the ridges 
run more or less parallel to the superior border of the bones. 
The jugular plates are rather more than three times as long as 
broad, the greatest width being at a point a little in advance 
of the meeting of the middle and posterior thirds of the bone ; 
behind this point the plate gradually narrows to a rounded 
posterior extremity, whilst in front they more quickly taper to 
a moderately fine point. The bones are ornamented with ridges, 
which radiate from the centre in all directions. 
The vertebra is represented b}' neural and haemal arches 
and spines of the ordinary coelacanthian form. 
* Besides the type, the ^^Titer has several more imperfect specimens 
which show various portions of the fish. 
