420 Bulletin American Museum of Natural History. [VoL XIX, 



tral fins. The posterior process appears to be the one first 

 reduced, but both soon disappear. From the figures and de- 

 scriptions of L. triqueter we must conclude that there is only 

 a single process on each side of each centrum. 



There are present about 6 or 7 rays of one pectoral fin, and 

 these are about 15 mm. long. A broad bone having a pos- 

 teriorly directed process lies just behind the operculum. This 

 may belong to the pectoral arch. The dorsal fin is missing, 

 unless it is represented by two or three rays which lie above 

 the ventral fins. 



One of the ventral fins is present and appears to contain 6 

 rays. Its supporting bone is 7 mm. long and 2.5 mm. wide 

 posteriorly, and is pointed in front. No remains of the anal 

 fin are seen. 



As may be seen from the figure, on the upper side and be- 

 hind the ventral fin, there is a row of triradiate dermal scutes 

 running along one side of the body. A similar row is found 

 on the other side, but the bone is broken away and only the 

 imprints of the scutes are left on the matrix. These scutes 

 continue for some distance in front of the ventral fins. They 

 appear to have a longer anterior branch than do those of L. 

 triqueter. There are also numerous fine intermuscular bones 

 throughout the length of the fish. 



The condition of the vertebrae and dermal scutes occupying 

 some distance behind the head is not easy to determine, on 

 account of the presence there of the bodies of three small 

 fishes. It is possible that these had been swallowed, but 

 their presence there is more probably accidental. 



The specimen collected at Hakel is a fragment 98 mm. 

 long. It is from the portion of the body behind the ventral 

 fins. It presents no new features. 



From Leptotrachelus gracilis Davis (Trans. Roy. Dublin 

 Soc, III, 1887, p. 623, pi. xxxviii, fig. 3), this species differs 

 in having a much less slender anterior abdominal region and 

 probably a longer post-pelvic region. Davis's species likewise 

 had quite different lateral vertebral processes. 



Collected at Hajula and Hakel. 



