FAillLY, I— SILURID^. 493 



Macrones itchheea, Guntlier, Catal. v, p. 84. 



Hemipimelodus itchkeea, Day, Joui-n. Linn. Soc. Zool. xii, p. 571. 



D. i I 0, P. 1/8, V. 6, A. 12-14 (/t^), C. 19. 



Length of head 5, of caudal 4|, height of body 6 in the total length. J?i/es— diameter 3 in the length of 

 head, 1 diameter from the end of snout, and also apart. Snout overhanging the mouth. Median longitudinal 

 groove on the head reaching to the base of the occipital process : a lateral process proceeds from the occiput, 

 curving rather outwards and downwards : the process at the shoulder pointed, and as long as the head excluding 

 the snout. Barbels — the nasal reach to the fi-ont third of the eye, the maxillary to the middle of the pectoral 

 spine, whilst the two mandibular pairs (which arise on a transverse line behind the lower lip) are longer than 

 the head. Teeth — villiform in jaws : none on the palate. Fins — dorsal spine smooth, as long as the head 

 posterior to the nostrils : pectoral spine equally long and denticulated internally. Air-vessel — in a lobe on 

 either side, bounded superiorly and partly laterally by the auditory ossicles. Colours — yellowish-bronze, 

 becoming silvery on the sides and abdomen : some dark blotches along the back descending to half way down 

 the sides. A black blotch on either lobe of the caudal, and another on the dorsal fin. 



Hahitat. — Elvers of the Deccan, it appears to be a small species. The one figured (from Poona) was the 

 largest obtained. 



3. Gagata batasio, Plate XCIX, fig. 5. 



Pimelodus batasio, Ham. Buch. Pish. Ganges, pp. 179, 377. 

 Bacjrus batasio, Cuv. and Val. xiv, p. 425 ; Bleeker, Beng. p. 56. 

 Batasio Buchanani, Blyth. P. A. S. of Beng. 1860, p. 150. 

 Macrones batasio, Glinther, Catal. v, p. 83. 



D. i I 0, P. 1/?,V. 6, A. 16, C. 20. 



Head small, as is also the mouth. Eyes — small, and high up. Barbels — eight, shorter than the head. 

 Fins — dorsal spine strong, entire : pectoral spine strong and serrated intei'nally : caudal lobed. Colours — body 

 diaphanous, having along either side two stripes spotted with black. 



Judging from the mandibular barbels and general structure of this fish, it would appear to be a Gagata, 

 whilst it is observed " there is no slit under the throat." 



Hahitat. — River Testa, attaining 3 inches in length. The figure is reproduced from H. B.'s manuscript 

 drawings at Calcutta, and the description from his work. 



4. Gagata tengana. 



Pimelodus tengana. Ham. Buch. Fish. Ganges, pp. 176, 377, pi. 39, f. 58. 

 Bagrus tengana, Cuv. and Val. xiv, p. 453 ; Bleeker, Beng. p. 56. 

 Batasio tengana, Blyth, P. A. S. of Bengal, 1860, p. 150. 

 Macrones tengana, Glinther, Catal. v, p. 84. 



B. vi, D. i/0, P. 1/8, V. 6, A. 14 {^%), C. 15. 



Length of head 4, of caudal 4, and height of body 4 in the total length. Eyes — of moderate size, 

 situated nearer the snout than to the posterior end of the opercle. Back rather prominent. Width of the 

 head equals its height, or its length excluding the snout. Mouth small, upper jaw slightly the longer. Median 

 longitudinal groove on the head lanceolate and extending to the base of the occipital process which is twice as 

 long as wide at its base, and reaches the basal bone of the dorsal fin. Barbels — the nasal reach the hind edge 

 of the orbit, and all the remainder arc shorter than the head. Fins — the first dorsal cut obliquely, its spine 

 smooth. Pectoral spine serrated internally. Colours — body diaphanous, having a gloss of gold on the sides. 

 On the back are many black dots which are collected into a blotch above the pectoral fin, and another exists on 

 the crown of the head. Dorsal and caudal fins dotted, edges nearly black. 



This fish, which is found in Assam, agrees with G. cenia except that the nasal barbels are described and 

 shown as being much longer, and the colour difiers. 



Habitat. — Brahmaputra river to about 3 inches in length. 



Genus, 25a— Nangea. 



Branchiostegals five or six. Gill-ope^iings rather wide, and not or only slightly adherent to the shin of the 

 isthmus. Thorax smooth. Upper surface of the head with sharp longitudinal ridges and covered by thin skin. 

 Eyes subcutaneous. Snout overhanging the mouth luhich is transverse. Nostrils close together, the anterior rounded, 

 the posterior with a barbel. Barbels eight, one nasal (tvhich may be nulimentary), one maxillary and two mandibular 

 pairs, the inner of ivhich last are anterior to the external pair. Villiform teeth in jaius, palate edentulous. First 

 dorsal fin with one spine and six to eight rays: adipose of moderate length. A pectoral spine. Ventral with six 

 rays situated posterior to the dorsal. Anal luith a moderaie number of rays (10-12). Caudal forked. Air-vessel in 

 two rounded portions each of which is enclosed in bone. 



Geographical distrilrution. — Small fishes found in the Indus, Jumna, Ganges, and Bengal rivers. 



This genus dilFers from Gagata in its barbels not being placed in a transverse line behind the chin : and 



