118 Annals of the Carnegie Museum. 



united with the sides above and with the isthmus below, leaving the 

 opening a very small slit in front of the pectorals ; a longer and a 

 shorter maxillary barbel on each side ; upper jaw and lips with about 

 eight widely separated series of teeth, the teeth narrow, more or less 

 spoon-oar-shaped, those of the inner series slightly larger ; teeth of 

 the lip very movable, those of the jaw more firmly attached ; lower 

 lip without teeth, three series of the teeth on the lower jaw, those of 

 the innermost series largest and forming a compact series. All the 

 teeth more or less angularly bent backward near the tips. Opercle 

 with about 4 spines ; subopercle with 6 ; anal short, behind the origin 

 of the dorsal ; head depressed, the eye directed upward, mouth 

 inferior ; caudal emarginate ; very large glandular swellings behind 

 the pectoral. 



This genus is most closely allied to Stegophilus and Miuroglanis. 

 It differs from Slegophilus in having two maxillary barbels and from 

 Miuroglanis in having an emarginate instead of a rounded caudal and 

 in having several series of labial teeth which are apparently wanting 

 in Miuroglanis. 



The genus Stegophilus as defined by Eigenmann and Eigenmann 

 includes both species with a rounded and an emarginate caudal. 

 Were the species large we should not hesitate in placing them in sep- 

 arate genera and a different rule should not apply here. 



The genera of the Stegophilinae may be defined and distinguished as 

 follows : 



a. Upper lip with several series of numerous, small, movable teeth ; each jaw with 

 several series of minute teeth ; mouth inferior. 

 b. Gill-membrane broadly united with the isthmus. 



c. Caudal widely forked, the upper lobe produced in a filament ; a single 



maxillary barbel Pseudostegophilus . 



cc. Caudal emarginate. 



d. A single maxillary barbel Henonemus* nov. 



dd. Two maxillary barbels Homodicetus nov . 



ccc. Caudal rounded. 



e. A single maxillary barbel Stegophilus. h 



ee. Two maxillary barbels Miuroglanis. 



* Henonemus Eigenmann & Ward genus nov. 



['ev = one, vrjfia = thread ; in allusion to the single barbel. ) 



Type Stegophilus inle^medius Eigenmann & Eigenmann. 



This genus is distinguished from Homodialus by the possession of a single barbel 

 at the maxillary. 



5 The genus Slegophilus as here understood contains two species, insidiosus and 

 rein hardti^ which differ very much from each other in the development of caudal ful- 

 cra and which may represent two distinct genera. 



