extending to below the frontmargin of the eye; the lower 

 jaw projecting beyond the upper. Posterior nostrils a slit near 

 eye; anterior nostrils very small, concealed ] ). Tongue free. Teeth 

 in the jaws and on vomer small, acicular, in narrow bands 2 ); 

 and not separated from those of the intermaxillary plate. Gill- 

 openings lateral narrow slits. 



Distribution: that of the single genus known. 



i. Heteroconger Bleeker. 



(BLEEKER, Versl. Med. Akad. Amsterdam (2) II. 1868, p. 331). 



For characters of the single genus see those of the family. 

 Distribution: Ambon. -- Canary Islands. 



i. Heteroconger polyzona Blkr. 



Heteroconger polyzona Bleeker, Versl. Med. Akademie Amsterdam, (2) II. 1868, 



P- 332. 

 Heteroconger polyzona Gunther, Cat. Brit. Mus. VIII. 1870, p. 44. 



Height about 48. Head about 17. Eye 5, conspicuously longer 

 than snout. Height of dorsal less than half height of body, 

 the distance between its origin and the gillopenings is about 

 equal to the length of the cleft of the mouth. Teeth in the 

 upper jaw small, acute, conical, subequal, numerous, in three 

 or four rows. Vomerine teeth acicular, pluriseriate, in an elon- 

 gate band, which is anteriorly much broader than posteriorly. 

 Bluish-green above, margaritaceous below, with about 80 black 

 transverse bands, 12 of which on the head, not reaching the 

 throat, those on body and tail encircling the body and con- 

 tinued on the fins, which are yellowish hyaline. Length 275 mm. 

 [One of the typical specimens of BLEEKER's collection in the 

 Leiden Museum seen by us]. 



Habitat: Ambon, in sea. 



6. Fam. MYRIDAE. 



(Echelidae). 



Body scaleless, elongate, vermiform, or slightly compressed, 

 or (Chilorhinus) short and much compressed. Anus far behind 



1) The specimen of BLEEKER in the Leiden Museum is in a bad state and its 

 snout damaged, where from its anterior nostrils are not visible. 



2) BLEEKER calls the vomerine teeth of H. polyzona Blkr. "granular". In the 

 specimen of BLEEKER in the Leiden Museum this is certainly not the case; they 

 are acicular as also GUNTHER calls them in his diagnosis of the genus. 



