598 PHYSOSTOMI. 



Lengtli of head 2/11, of caudal nearly 1/3, height of body 2/7 of the total length. %es— diameter 

 nearly 1/2 of length of head, 1/4 of a diameter from end of snout, 1 diameter apart. Barbels — rostral absent ; 

 the maxillary pair extend to below the orbit. Fins — dorsal situated over the first portion of the anal, and 

 midway between the posterior extremity of the orbit and the base of the caudal, which last is lunated. 

 Lateral-line — absent. Colours — a dark band passing along the side of the body, and a second dotted line below 

 it. Dorsal and anal spotted with black in lines. In some sisecimens the body is intensely blue. 



Habitat. — Pegu and Moulmein. Out of 20 specimens none exceeded fjlO of an inch in length. 



B. — A portion or the whole of the abdominal edge trenchant, 

 a. Dorsal fin ojJposite the anal, which latter is elongated (9 to 21 branched rays.) 



Genus, 20 — Perilampus, McClelland. 



Chela, Swainson : Laubuca, Bleeker : Cachius and Eustira, Giinther. 



Psetidohranchice present. Body oblong, compressed, with a cutting abdominal edge. Mouth directed obliquely 

 upward. Barbels absent. Pharyngeal teeth in three rows 5, 4 or 3, 2 or 1/1 or 2, 3 or 4, .5, uncinate. Dorsal fin 

 rather short, without any osseous ray, and commencing opposite or behind the origin of the anal, which last has many 

 rays. Outer ventral ray elongated. Scales of moderate size. Lateral-line concave, passing to the lower half of the 

 base of the caudal fin. 



Geographical distribution. — Fresh waters of India, Ceylon, and Burma. 



SYNOPSIS OP SPECIES. 



1. Perilampus atpar, D. 9, A. 22-24, L. 1. 65-6o. India generally, and Burma. 



2. Perilampus laubuca, D. 9, A. 19-23, L. 1. 34-3?. Ganjam, Orissa, Bengal, Assam and Burma. 



3. Perilampus Geylonensis, D. 12, A. 17, L. 1. 35. Ceylon. 



11. Perilampus atpar, Plate CLI, fig. 6. 



Cyprinus cachius and atpar. Ham. Buch. Fish. Ganges, pp. 258, 259, 384 ; Cuv. and Val. xvi, pp. 453, 454. 



Chela atpar. Gray and Hard. 111. Ind. Zool. 



Perilampus cachius &nd psilopteromus, McClell. Ind. Cyp. pp. 289, 396, pp. 289, 396, pi. 46, f. 6, and f. 4, 

 (from H. B.'s MSS.) 



Chela anastoma, Swainson, Fishes, ii, p. 285. 



Leuciscus atpar and cachius, Bleeker, Beng. p. G6. 



Perilampus macropodus, Jerdon, M. J. L. and S. 1849, p. 325. 



Paradanio elegans, Day, Proc. Zool. Soc. 1867, p. 297. 



Cachius atpar, Giinther, Catal. vii, p. 339. ~ 



Bonhuaso, Ooriah : Nga-man-dan, and Ya-paw-nga and. Nga-phyin-gyan, Burmese; Kachhi, Beno-. : 

 Mor-ri-ah, Punj. : Bi-dah, Sind. ° 



B. iii, D. 9(f), P. 10, V. 5-6, A. 22-24(-r|:fT), L. 1. 55-05, L. tr. 10-13/4. 



Length of head 5J to 6, of caudal 4i- to 5, height of body 4 to 4i in the total length. jEJyes— diameter 

 3 to 4 in length of head, 3/4 of a diameter from end of snout, 1 1 diameters apart. 'Body strongly compressed, 

 the abdominal edge being cutting. Cleft of mouth oblique, extending to nearly beneath the margin of orbit. 

 Terf/i— pharyngeal, 5, 4, I/l, 4, 5, crooked, pointed. Fins — dorsal commences opposite the beginning of the 

 second third of the anal. Pectoral elongate. Ventral with an elongated outer ray extending to the middle or even 

 end of the anal fin. Caudal forked. Lateral-line— 4: rows of scales between it and base of ventral fin. Colours— 

 silvery, with a burnished lateral band. Dorsal and caudal fins yellow. 



Habitat. — Sind, throughout India and Biu-ma ; attaining 4 inches in length. 



2. Perilampus laubuca, Plate CLI, fig. 5. 



Cypri7ius laubuca and ? dancena, Ham. Buch. Fish. Gauges, pp. 260, 342, 384, 393; Cuv. and Val. 

 xvi, p. 466. 



Perilampus guttatus and ^persetts, McClell. Ind. Cyp. pp. 289, 394, 395, pi. 45, f. 4 (erroneously marked 

 pi. Ivi, f. 10, from H. B.'s MSS.) pi. 40, f. 5 ; Cuv. and Val. xvi, p. 409. 



Cyprinus laubuca and dancena, Cuv. and Val. xvi, p. 45(5 ; Bleeker, Beng. pp. 68 and 138. 



Perilampus fuhescens, Blyth, J. A. S. of B. 1860, p. 163; Day, Proc. Zool. Soc. 1869, p. 559. 



Chela laubuca, Giinther, Catal. vii, p. 335. 



Laubuca guttata, Bleeker, Atl. Ich. Cyp. p. 33.- 



Perilampus laubuca, Day, Proc. Zool. Soe. 1809, pp. 380, 614. 



Banhoe, Ooriah : Nga-me-luung, Burmese : Layuhuka and Danlcena, Beng. : Dannahrah, Hind. ; 

 Moh-do-nee-honak and Her-bag-gi, Assam : Cuon-che-li-e, N. W. Prov. 



B. iii, D. 10-11(^?^), P. 13, V. 7, A. 19-23(-5^^^), C. 19, L. 1. 34-37, L. tr. 6-7/5. 



Length of head 6 to 0, of caudal 5, height of body 3| to 4^ in the total length. Eyes --diameter 3 to 3i 

 m the length of head, 3/4 to I diameter from end of snout, 1| diameters apart. Body strongly compressed with 



