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culations are more than usually distant towards the proximal ex- 
tremities of the principal rays of the pectoral, and also, though to 
a less extent, in the lower lobe of the caudal. The joints are scale- 
like in general aspect; the distal margin of each is notched or ! 
concave, the proximal correspondingly convex ; and the outer sur- 
face is in most cases marked with at least one delicate furrow 
parallel with the anterior and posterior borders; near the bases of 
the dorsal and anal fins the joints present indeed an appearance as 
of fine striation. The fulcra of the anterior margins of the fins are 
closely set and very minute, being only observable with the aid of 
a lens. 
Remarks . — Under the name of Amblypterus punctatus , three im- 
perfect specimens of fossil fish from the shales of Wardie were de- 
scribed and figured by Agassiz in the “ Poissons Fossiles.” One 
of these is a head with the anterior part of the body (Atlas, vol. ii. 
tab. 4 b, fig. 4) ; the second (ib. fig. 5) wants the head and 
shoulders and the extremity of the tail ; the third (ib. fig. 3) dis- 
plays the entire caudal fin, but is obliquely cut off just in front of 
the dorsal and anal. The principal characters which he assigned 
to this species were — the considerable depth of the anterior part of 
the body; the character of the teeth, which had the form of small 
obtuse cones apparently disposed in several rows; and the orna- 
ment of the scales, which consisted, in those in front, of oblique un- 
dulating lines closer together at the anterior part of each scale and 
mingled with punctures, the latter more numerous towards the 
posterior margin ; while on the scales of the hinder part of the 
body those lines were less crowded, and the punctures more numer- 
ous, the former entirely disappearing on the scales of the pedicle 
of the tail, where only a few scattered points were left. 
For some time after commencing the study of the fossil fishes of 
Wardie, this species “ punctatus stated by Agassiz to he common 
in that locality, was to me a complete enigma, as among the 
numerous entire specimens of fish which I had the opportunity of 
examining, I could not find one which agreed in all its characters 
with Agassiz’s description, though in some the anterior , and in 
others the posterior part of the fish answered well enough. The 
mystery was, however, at once cleared up by an examination of 
the figured specimens, of which two, collected by Lord Greenock, 
