silurid^;. 9 



Barbels long, band-like 54. Pirinampus, p. 135. 



Snout pointed ; villifonn teeth in the upper jaw only. 



55. CONORHYNCHUS, p. 135. 



Dorsal with 10 soft rays 56. Notoglanis, p. 136. 



Each jaw with one or two series of small flattish teeth. 



57. Callophysus, p. 136. 



** The gill-membranes are united below the throat, scarcely notched in the 

 middle: African. 



Snout pointed 58. Auchenaspis, p. 137. 



Group H. Ariina. 



The anterior and posterior nostrils are placed close together, none 

 being provided with a barbel, but the posterior with a valve. Tropics. 



a. Maxillary and mandibulary barbels present. 

 * Mandibulary barbels four. 



Head osseous above ; teeth on the palate present and fixed. 



59. Arius, p. 138. 



Head and nape covered entirely with soft skin ; dorsal with 7 soft rays. 



60. Galeichthys, p. 174. 



Teeth on the palate moveable, in two patches. 61. Q-enidens, p. 175. 

 Palatine teeth none ; teeth in the jaws villifonn. 



62. Hemipimelodus, p. 176. 

 Palatine teeth none ; teeth in the jaws in a single series. 



63. Ketengus, p. 177. 

 ** Mandibulary barbels two. 



Adipose fin short 64. ./Elurichthys, p. 177. 



b. Maxillary barbels only. 



Barbels compressed, band-like 65. Paradiplomystax, p. 180. 



Barbels fleshy, thick 66. Diplomystax, p. 180. 



Barbels osseous 67. Osteogeniosus, p. 181. 



c. Mandibulary barbels only. 



The cleft of the mouth extends to below the eye. 



68. Batrachocephalus, p. 182. 



Group I. Bagarina. 



The anterior and posterior nostrils are placed close together ; a 

 barbel between tbem. Indian. 



Thorax without longitudinal- plaits 69. Bagarius, p. 183. 



Thorax with longitudinal plaits ; teeth on the palate. 



70. EUCLYPTOSTERNUM, p. 183. 



Thorax with longitudinal plaits ; palate toothless. 



71. Gxyptosternum, p. 185. 



t» k4 . 1 fHARA,p. 189. 



Doubtful genera \ 



[Amblvceps, p. 190. 



