442 
Proceedings of the Royal Society 
beautifully preserved. The opercular bones are rather small ; the 
jaws remarkably slender and delicate ; the external ornament of the 
facial bones consists, like that of the cranial shield, of delicate wavy 
ridges. No specimen I have as yet seen affords, however, the 
smallest trace of teeth. The paired fins are rather small. The 
pectoral is in no case well preserved, but there is sufficient evidence 
that its longer rays were not articulated till towards their termina- 
tions. The ventrals are still smaller, and are equidistant in position 
between the pectorals and the commencement of the anal. The 
median fins are, on the contrary, rather large in proportion to the 
size of the fish. The anal commences rather in front of a point 
equidistant between the origin of the ventrals and that of the lower 
lobe of the caudal ; it is high and acuminate in front, and pretty 
deeply cut out behind ; the length of its base is equal to that of its 
longest rays. The dorsal is similar in shape to the anal, and com- 
mences only slightly in front of the origin of the latter. The caudal 
is pretty large, and deeply cleft, the body prolongation along the 
upper lobe being, however, comparatively delicate. The rays of all 
th ese fins are slender, ganoid, and smooth externally ; their 
articulations tolerably distant ; the fulcra on their anterior margins 
obvious, though minute. 
The scales are remarkable for their large size on the flanks, while 
on the belly they suddenly became very low and narrow ; they 
diminish rapidly in size posteriorly, and on the tail pedicle are 
rather small. Externally they are brilliantly polished and nearly 
smooth ; on the flank scales, however, a few shallow furrows extend 
a little way forwards from the posterior margin, which is, as usual, 
sharply denticulated. 
Remarks . — The original specimen, collected by Lord Greenock 
at Wardie, and figured by Agassiz, is in the collection of the Royal 
Society of Edinburgh. It is very imperfect, showing no fins save 
the mere origins of the anal and caudal, the former of which seems 
to have been overlooked by Agassiz. On the other hand, I cannot, 
by the most careful examination, verify his statement regarding the 
presence of small teeth, “ en brosse ” upon the jaw. I am indebted 
to Professor Turner for the loan of a specimen from Cornceres, in 
Fifeshire, which belonged to the late Professor Goodsir ; it is pos- 
sible that this may be the “ Gat opt eras fusiformis v which Mr 
