^2 The Philippine Journal of Science 1923 



Genus T2ENI0C0NGER 7 novum 



This genus differs principally from Heteroconger Bleeker in 

 having pectoral fins; they are very small but plainly evident; 

 the mouth is also smaller than in Heteroconger; the vomerine 

 teeth are much thicker and stronger than those of the jaws; 

 the upper lip forms a loose flap or fold turned back over the 

 upper jaw; there is a similar flap on the lower jaw but it is 

 less-well developed. 



Type, Tsenioconger chapmani sp. nov. 



Taenioconger chapmani sp. nov. Plate 3. 



An excessively elongated and slender eel, depth 86.25 in 

 length; the elongated subcylindrical trunk passes gradually into 

 the flattened, ribbonlike tail which is 2% times as long as head 

 and trunk together; head small and short, its length a little 

 more than 7 in trunk and a trifle more than 26.5 in total length, 

 its greatest breadth 3% in its own length; the obtuse blunt 

 snout about 6.5 in length of head; mouth wholly anterior, very 

 oblique, not extending to eye; lower jaw same length as snout 

 and projecting like that of a bulldog; eye very large, its diameter 

 about one-fifth the length of head; posterior nostrils in front 

 of eyes, about on a level with their upper margin. 



Teeth very small, pointed, subequal, closely set; upper jaw 

 with three rows anteriorly, becoming reduced to two and finally 

 at rear to a single row of larger, needlelike teeth; vomer with 

 six rows anteriorly, forming a broad patch and tapering poste- 

 riorly to a single row; vomerine teeth two or three times as 

 coarse as and also somewhat longer than those in bands on 

 jaws; mandibles with four rows of teeth anteriorly, these re- 

 duced to two rows posteriorly. 



Gill openings nearer back than belly and wider than base of 

 the minute pectorals which lie directly behind them; pectorals 

 4 in greatest depth of body and 13 in length of head ; height of 

 dorsal one-fourth of depth of body, its origin less than half the 

 height of body behind gill openings; anal begins immediately 

 behind vent; origin of lateral line on nape; a row of pores on 

 lower jaw and along throat as far back as a point beneath origin 

 of lateral line; two pairs of pores on snout in front of posterior 

 nostril and a line of large pores curving under and around each 

 eye to top of head. 



T Tsenioconger, from Taivm, a band ; conger, an eel. 



