} 96 TELEOSTEI. PHYSOSTOMI. 



A. 11-12. Width of head two thirds of 

 its length. Adhesive apparatus 

 rather elongated and narrow. Max- 

 illary barbels reacb middle of pec- 

 toral fin 3. G. conirostre, p. 198. 



A. 11-12. Pupil of eyes transversely 

 oval. Maxillary barbels reach to 

 below the hind edge of the eye. Skin 

 roughened with small spinate tube- 

 rosities 4. G. botium, p. 198. 



A. 11. Pupil of eyes circular. Maxil- 

 lary barbels reach to below the hind 

 edge of the eyes. Skin looks as if 

 it had scales imbedded in it o. G. tekhitta, p. 199. 



A. 11. Head 4f in the total length. 

 Maxillary barbels reach first third of 

 the pectorals 6. G. striatum, p. 200. 



A. 10-11. Maxillary barbels reach base 

 of pectoral fin. Dorsal spine with 

 serrations on both edges 7. G. madraspatamnn, p. 200. 



A. 0-11. Width of head nearly equals 

 its length. Maxillary barbels reach 

 base of pectoral spine. Adhesive 

 apparatus wider than long 8. G. pectinopterum, p. 201 . 



A. 0. Upper surface of head with ele- 

 vated spots. Maxillary barbels as 

 long as the head 9. G. cavia, p. 202. 



208. (1.) Glyptosternum lonah. (Fig. 72.) 



Bagrus lonah, Sykes, Tr. Z. S. ii, p. 371. 



Glyptosternum lonah, Day, Fish, India, p. 49(5, pi. cxiii, fig. 5 (st-e 

 syuon.). 



D. 1/6 | 0. P. 1/9. V. 6. A. 11-13 (3-4/8-10). C. 15-17. 



Length of head 5 to 5^, of caudal fin 5, height of body 7 in the 

 total length. Ej/es slightly behind the middle of the length of 

 the head, the width of the interorbital space equals one third to 

 two sevenths of the length of the head. Width of head nearly or 

 quite equals its length; upper surface rough. Width of gape of 

 mouth 2| to 3 in the length of the head. Lips not fringed. 

 Occipital process nearly or quite four times as long as broad. 

 Thoracic adhesive apparatus rather elongated, reaching to the 

 first third of the pectoral spine, its plaits are scarcely branched. 

 Barbels the nasal reach halfway to the orbit, the maxillary extend 

 to the base or first third of the pectoral, the outer mandibular 



air to the gill-opening, the inner are shorter. Fins dorsal 

 igher than the body, its spine rather slender, enveloped in skin, 

 If to 2| in the length of the head ; adipose dorsal with its base 

 longer than that of the first dorsal, and equal to half the interspace 

 between the two fins. Pectoral spine moderately broad, internally 

 strongly denticulated, externally roughened in some specimens, 

 smooth in others, the fin does not nearly reach the ventral. 



