Br. R. H. Traquair — New Fish Remains from Borough Lee. 543 



awry, and having only one of its boundaries prominent and denticu- 

 lated. It is also to be noted that the grooved aud gibbous side of 

 the spine always coincides with the convexity, the narrow and 

 flattened side with the concavity of the lateral curve. That the 

 spines showing this remarkable want of bilateral symmetry were 

 paired and not median, there cannot be the smallest doubt. 



Dipnoi. 

 Ganoprisfodus splendens, Traquair. 



Gnnopristodus splendens, Traq. Geol. Mag. Dec. II. 1881, Vol. VIII. p. 37. 



Since my first paper on the fish remains of the Borough Lee 

 Ironstone appeared, I have obtained an important clue to the nature 

 of the fish to which the singular dentigerous fi-agments belonged, 

 which I then distinguished as Ganopristodus splendens. From these 

 subsequent finds it appears that Ganopristodus was a fish closely 

 allied to, and possibly generically identical with, the Uronemus 

 lohatus, Ag., of the Eurdiehouse Limestone. 



The first specimen to be noticed is a mass of dislocated cranial 

 bones, which for the most part, unfortunately, are quite unreadable. 

 Lying amongst them, however, is a flat plate, evidently palatal 

 in its nature, a considerable area of which adjoining the outer margin 

 is closely covered with small rounded dental tubercles, by which 

 apparently the. roof of the mouth was roughened. The external 

 gently curved margin of this plate displays a row of the brilliantly 

 ganoid, laterally compressed, basally confluent, short conical teeth, 

 characteristic of the detached fragments first noticed. Of the other 

 bones it may be observed that some, which evidently belonged to 

 the cranial roof, are ornamented externally by a tolerably fine 

 reticulo-confluent tuberculation, having no trace of ganoine. 



Previous to the occurrence of the last described specimen, my 

 attention had been drawn to fragments, from the same bed, of the 

 body of a fish closely resembling Uronemus in being covered with 

 thin rounded scales, in having a well-developed internal skeleton 

 consisting of long curved ribs, spinous processes and intei'spinous 

 bones, but no vertebral bodies, and in the tail being evidently 

 pointed and diphycercal with continuous dorso- and ano-caudal fin. 

 One of these specimens also displays a portion of an acutely lobate 

 ventral fin, with central scaly axis and fringing rays on each side. 

 And lately I have succeeded in obtaining two entire s2Decimens, in 

 which this Uronenms-like body lies in conjunction with the 

 Ganopristodus head. 



The more instructive of these two specimens is about 12 inches in 

 length, of which the anterior 3^ inches are occupied by the remains 

 of the head. The head is crushed vertically, and on one slab is seen 

 the impression of a considerable portion of the cranial roof, composed 

 of polygonal plates, which, as shown by squeezes in wax, exhibit 

 the same reticulate-tubercular ornamentation seen on the dislocated 

 plates already mentioned. On the right side is seen the impression 

 of the edge of the mandible with the characteristic teeth, and on tlie 

 left the marginal teeth of the palatal plate, while in front, in the 



