SJLURIDjE. 155 



basal bone of the dorsal fin. Upper surface of the head nearly 

 smooth, the few ridges not being tuberculated. Barbels nasal 

 reaching the hinder third of the eye, maxillary the base of the caudal, 

 external mandibular the first third of the pectoral, while the inner 

 pair are shorter. Tedh in an uninterrupted semiluuar band 

 across the palate. Fins dorsal as high as the body, its spine very 

 slender, only osseous at its basy and articulated in its upper two 

 thirds ; length of base of adipose dorsal equal to that of the rayed 

 fin, whilst the interspace between the two fins is of the same length. 

 Pectoral as long as the postorbital portion of the head, the spine 

 moderately strong and one half as long as the head, denticulated 

 internally. Ventral nearly one half as long as head and just ex- 

 tending to the anal. Upper caudal lobe with a filamentous pro- 

 longation. Free portion of tail one half longer than high. Colour 

 of af light brown, shot with purple ; fins darkest externally. 



Possibly all these three last forms are local races of one species. 



Hab. Burma, along the valley of the Irrawaddi. 



163. (9.) Macrones cavasius. 



Pimelodus cavasius, Ham. Bach. Fish. Ganges, pp. 203, 379, pi. xi, 



tig. 67. 

 Macrones cavasius, Day, Fish. India, p. 447, pi. c, tig. 1 (see synon.). 



Vella Mletee and Cutta, Tarn. ; Nahra jella, Tel. ; Gutitea, Ooriah ; 

 Kavasi tengara, Beug. ; Nya-zin-zine, Burmese ; Shinyti and Shingata, 

 Marathi. 

 B. vi. D. 1/7 | 0. P. 1/8. V. 6. A. 11-13 (4/7-9). C. 16. 



Length of head 6 to 6 j, of caudal fin 6, height of body 5 in the 

 total length. Eyes diameter 3| to 3 in the length of head, 1 to 

 14 diameters from the end of snout, and 1| apart. The greatest 

 width of the head equal to its length excluding the snout. Snout 

 rather obtuse, upper jaw a little the longer ; width of the gape 

 equal to two fifths of the length of the head; the cleft extends 

 halfway to below the orbit. Upper surface of the head slightly 

 roughened, its median longitudinal groove rather wide and extending 

 to the base of the occipital process, which last is narrow and three 

 or four times as long as wide at its base, and with a shallow groove 

 along its last half or two thirds ; no interspace between its pos- 

 terior extremity and the basal bone of the* dorsal fin. Barbels 

 the nasal nearly or quite as long as the head, the maxillary ex- 

 tending to beyond the base of the caudal fin, the external mandi- 

 bular almost to the base of the ventral, while the internal are as 

 long as the head. Teeth on the palate in an uninterrupted cres- 

 centic band, fins dorsal spine weak, entire, and nearly or quite 

 as long as the head excluding the snout, the tin is rather higher 

 than the body and pointed; the adipose dorsal commences just 

 behind the rayed one, and the length of its base is three times 

 as long. Pectoral spine as long as, but stronger than, the dorsal, 

 smooth externally, denticulated internally. Ventral arising just 



