333 
ACTINOPTERYGIl. 
the tail, suggestive of a separate caudal fin, of which 
few rays remain. The characteristic intermuscular hones 
are exhibited dorsally throughout the trunk, and he ow 
the vertebral axis in the caudal region, The limestone 
is stained by the fossil, but there are no traces^ o 
scales. Lewis Co 
P. 4: / 51 . Larger but moro imperfect and distorted specimen, di ^ 
playing parts of the head, pectoral arch, pectoral fin, an< 
scales (PI. XVni. fig. 2). The stout supraoccipital bone 
of the skull (s.occ.) projects considerably backwards, an 
the rostrum is slender. The length of the oraniu 
indeed, appears to bo moro than three times as groa ^ 
its width at the occiput. The right mandibular ramus 
shown ( md .), rising to a low coronoid proeoss inimef ia . 
behind its toothed portion. The clustered teeth are ve 
stout and blunt. The vertebrae behind the bea ® ^ 
exposed from above, but the neural spines arc bro ' 
away from the much expanded arches. There ore 
prossions of some of the short ribs ; while a few o ^ 
pointed transverse processes are preserved in the lin 
part of the abdominal region. The tail is much di» ° r 
and too imperfect for description. The clavicles (c *) ® 
seen immediately behind the head, ono of them disp 
its slender, arched form, with tapering upper cud. 
of the pectoral fins (pet.) is also preserved, though a i ^ 
distorted and imperfect distally. Behind this, the brown 
impression of the soft parts of the fish is cunou 
mottled, as if there were indications of small, rudimen ^ 
quadrangular scales. Further back, the course o P 
of tho intestine is marked bv its phosphatic contents. 
lewis Coll- 
P. 4030. More imperfect small specimen 
the obtuse teeth. 
, much distorted, showi n 
Lewis Colt" 
48150. Portion of very small eel, probably young of this^speh 
Urenchelys hakelensis (Davis). 
[Plate XVIII. fig. 3.] 
1887. Anguilla hakelensis, J. W. Davis, Trans. Roy. Dublin Soc. J 
vol. iii. p. 626, pi. xx. fig. 3. 
Cijpe. Nearly complete fish; British Museum. 
