23,2 H err e: Philippine Eels 145 



origin of dorsal over base of pectoral, highest near origin, where 

 it is equal to one-half the depth of body, becoming lower poste- 

 riorly; gill openings much narrower than their interspace. 



Color pale brownish gray, dorsal surface much darker than 

 the part below lateral line; interspace between eyes blackish; 

 body almost everywhere thinly sprinkled with minute dark dots, 

 which extend to the hyaline fins, where they form indications 

 of a black margin. 



The above description is from a specimen obtained at Marin- 

 duque Island, with dimensions as follows: Length, 184 milli- 

 meters; head, 31; trunk, 48; tail, 105; depth, 10; eye, 7; snout, 

 7.5; gape, 8; pectoral, 11. 



This is very close to Congrellus anago as described by Weber 

 and Beaufort 5 but differs in several particulars, especially in 

 the dentition, as may be seen by comparing the figure given 

 with those just cited. Beyond question other species of the 

 genus occur here, but as yet they have not been collected. 

 Genus TJEOCONGER Kaup 

 Uroconger Kaup, Cat. Apod. Fishes Brit. Mus. (1856) 110; Weber 

 and Beaufort, Fishes Indo-Austr. Arch. 3 (1916) 264. 



Small elongated eels with a subcylindrical body and a very 

 long and tapering whiplike tail which becomes strongly com- 

 pressed laterally and is at least twice as long as trunk; pec- 

 torals well developed ; dorsal beginning approximately over base 

 of pectorals and confluent with caudal and anal; head conical, 

 as deep as or deeper than body, the forward portion depressed, 

 and the blunt snout projecting beyond lower jaw; eye moderately 

 large, covered by skin; anterior nostrils near apex of snout, 

 without tubules; posterior nostrils large slits near to and in 

 front of eyes ; mouth of medium size, extending a little beyond 

 middle of eye ; lips of moderate size, upper with a row of short 

 slitlike mucus pores; tongue free; teeth needlelike, small but 

 quite unequal in size, those of upper jaw in two rows, in lower 

 jaw in two complete rows with a third very short inner row; 

 teeth on vomer small, in one or two rows, sometimes with a 

 few larger caninelike teeth in front; those on intermaxillary 

 plate in two irregular series, eight or ten in number; some of 

 them, especially the outer ones, may be enlarged; lateral line 

 present ; gill openings large, situated vertically before and below 

 base of pectorals. 



: ' Fishes Indo-Austr. Arch. 3 (1916) 262, figs. 109 and 111. 



