622 SURGEON F. DAY ON THE | Dee. 9, 
Fins. The dorsal arises midway between the posterior extremity 
of the orbit and the base of the caudal. The anal commences under 
the anterior third of the dorsal. Caudal lunate. 
Scales. Three and a half rows between the lateral line and the 
base of the ventral fin. 
Colours. Silvery, with a badly defined lateral band, and some 
vertical yellow lines in the anterior half of the body. Dorsal and 
anal greyish, with reddish margins anteriorly. In the immature 
there is a dark humeral spot, and a steel-blue lateral band goes to 
the centre of the caudal fin; in its last half it has a scarlet stripe 
along its centre. 
Hab. A tank near Pegu. Four specimens captured, from 24%; to 
4 inches in length. 
CHELA SLADONI, sp. nov. 
B. iii. D. 2/8. P.11. V.8. A.2/19. C.21. L.1. 68. L. tr. 10/8. 
Length of head 4, of caudal 3, height of body j of the total length. 
Eyes. Diameter # of length of head, 7 of a diameter from end of 
snout. 
Posterior extremity of the maxilla reaches to beneath the anterior 
third of the orbit. The suborbital ring of bones is half as deep as 
the diameter of the orbit. 
Teeth pharyngeal, crooked, 5, 4, 2/2, 4, 5. 
Fins. Dorsal commences opposite the anal; lower lobe of caudal 
the longest. Edge of thorax rounded; the serrated abdominal 
margin commences opposite the base of the pectoral fin. 
Colours. Silvery ; caudal black-edged. 
Hab. Irrawaddi, as high as Mandalay. Very common. 
CHATOESSUS MODESTUS, Sp. NOV. 
D. 3/13. P.16. V.8. A. 3/25. C.21. L147. DL. tr. 17. 
Length of head 1, of pectoral 4, of caudal nearly 7 of the total 
length. Height of head 4, of body 4, of dorsal fin } of the total 
length. 
ies. Diameter + of length of head, 3 of a diameter from end of 
snout, 1 diameter apart. 
Body strongly compressed ; profile above the head slightly concave, 
then a great rise to the base of the dorsal fin. Abdominal profile 
equally convex. 
Mouth transverse; snout moderately projecting over the lower 
jaw. The posterior extremity of the upper jaw is opposite the 
centre of the anterior margin of the orbit. 
Fins. Dorsal fin arises slightly nearer to the snout than to the 
base of the caudal fin; its last ray is not prolonged. 
Scales regularly arranged; eighteen serrations anterior to the 
ventral fin, and eleven posterior to it. 
Coloration uniform. 
Hab. Along the Bassein River as high as the Ken-gay-gyee Lake. 
Many specimens were taken, up to 53 inches in length. 
