396 Proceedings of Royal Society of Edinburgh . [sess. 
with the most reluctance, hut the occurrence of links 
apparently connecting it with the others, leaves me no 
alternative. C.S., W. Calder. 
/. Yar. affinis, Traq. — Like intermedins , hut the fins appar- 
ently rather smaller and composed of fewer rays. C.L., 
Gilmerton, Loanhead, Wallyford, Denhead. 
As to E. ovatus, Traq., I abandon it altogether, as being pretty 
certainly a form with the body shortened up by distor- 
tion. 
Elonichthys midtistriatus , n. sp. — The remains of this remarkable 
and undoubtedly new species which have as yet been found, consist 
of fragments of fishes more or less distorted, and also disjointed 
scales and bones. The former set of remains indicate that the body 
was deeply fusiform, the fins large and composed of numerous 
closely striated rays, and the head bones resembling in shape those 
of E. pectinatuSj Traq. But the scales are altogether peculiar. 
Those of the flanks are higher than broad, more or less rectangular 
in form, the covered area narrow, the exposed portion covered with 
fine sharp raised striae or ridges, which are sub-parallel, frequently 
bifurcating and also anastomosing, and cross the surface of the 
scale obliquely from above downwards and backwards. From the 
upper margin of the scale, and rather near the anterior superior 
margin, there projects a strong pointed and grooved articular spine ; 
the posterior margin is entire and without serrations. 
When I first saw the scales of this fish, their form and manner 
of ornament strongly suggested Platysomid affinities, but the maxilla 
and cast of the mandible lying with them in the same slab clearly 
showed that we had to deal with a member of the Palseoniscidse. 
Other specimens, as aforesaid, indicate that the safest genus to 
place it in is Elonichthys. It must have attained a considerable 
size. 
C. A., Gilmerton and Loanhead. Type specimens in the collection 
of the author. 
Elonichthys striatus , Ag. — I formerly separated this species 
under the generic term Cosmoptychius, owing to the presence of a 
small plate, which is wedged in anteriorly between the operculum 
and the quadrate plate beneath it, usually reckoned as suboperculum. 
