1 84 9 .] Catalogue of Malayan Fishes. 1217 



longest being ^ of the head. The caudal terminates in a very sharp 

 point ; its length is \ of the head. The distance between the first, 

 left, ventral and the anal ray is scarcely \ of that between the point of 

 the muzzle and the upper orbit. The right ventral is smaller and so 

 near the left, which is closely connected with the anal, that Buchanan 

 Hamilton overlooked both. In other respects the fins resemble 

 those of P. bilineata. Single individuals occur, but rarely, at Pinang. 



Plagusia potous, Cuvier. 



Russell, LXXIII. Jerree Potoo D. 



Plagusia potous, Cuvier, R. A. II- 344 ('). 



Ikan ledah of the Malays. 



Left side. Lighter or darker copper-red ; the scales with strong 

 metallic iridescent reflections ; opercle and abdominal cavity pale 

 blackish blue ; fins transparent pale brownish, minutely dotted with 

 brown ; caudal blackish ; ventrals whitish. Iris annular, pale golden ; 

 rest blackish blue ; superior margin of the upper orbit and lower of 

 the inferior with a buff crescent-shaped membrane. 



Right side. Brownish white ; opercle and abdominal cavity pale 

 bluish. 



D 126 or 127. 



C 10, V4, P0, Br. VI. 



A 94 or 95. 

 "230~or 232. 



Habit : Sea of Malayan Peninsula and Islands. 

 Coromandel. 



Total length : 1 ft. 2 inch. 



Left side. The length of the head is 5} in the total. The distance 

 from the centre of the oval muzzle to the anterior angle of the upper 

 orbit is from 1 1| to T V of the total length. The point proceeding down- 

 wards from the muzzle covers the symphysis of the lower jaw, or is a 

 little shorter ; its length equals the distance between the muzzle and 

 the upper orbit. The latter is situated a little in front of the centre 

 of the length of the head, opposite the middle of the upper lip ; the 

 horizontal diameter is T l T of the length of the head. The lower orbit, 

 iu size equals the upper ; it is placed little farther back, considera- 

 bly in front of the angle of the mouth. The vertical distance between 



/ R 2 



