WKLLBURN : ON SOMK XKW SPEC IH:s OF FOSSIL Fisri. 
75 
Form, and Loc: D Shales, Middle Grits, at Wadsworth 
Moor, Marsden, Ivy Clough, near Halifax, all in Yorkshire, 
also in D Shales, Middle Grits at Summit, and Antley Gate 
in Lancashire. 
Elonichihys orimtus sp. nov. 
Type (which is a crushed specimen sliowing the greater 
part of the bod}'^ of the fish) and otlier more fragmentary remains 
are in the authors collection. 
Description. — The head bones are ornamented with fine 
well-spaced, slightly- vermiculating ridges ; on tlie mandible 
the lowermost ridges run forward parallel to the lower border 
of the bone, whilst the uppermost ones run forwards — the most 
anterior ones branching — and upwards to cut the dentary margin 
of the bone at a very acute angle. 
The scales of the fish are sculptured in a very striking and 
beautiful manner, whicli varies somewhat on the various parts 
of the body, viz., on the principal flank scales the ornamentation 
is of a duplex pattern, viz., below a line drawn from the anterior 
superior angle to the posterior inferior angle are well-marked 
ridges which run, from the anterior border, downwards and 
backwards, converging towards the posterior inferior angle : 
above the diagonal line fine ridges which run in a more or less 
irregular manner towards the posterior border, whilst several 
very fine ridges run close to and parallel to the superior border. 
Further back on the flank tliere are often several fine ridges 
running parallel to the inferior as well as the superior margin, 
wliilst between these the coarser ridges run in a more or less 
irregular manner towards the posterior border which appears 
to be somewhat serrated. On the lower ventral scales, there are 
firstly several well-marked ridges running obliquely downwards 
and backwards from the anterior to the inferior border, whilst 
behind these are — on the greater part of the scale — ridges which 
run posteriorily more or less parallel to the superior and inferior 
margins. The general character of the scale sculpture is con- 
tinued far back towards the caudal region. The median dorsal 
