1918.] 



N. Annandale : Fish oj the Inle Lake. 



50 



and from |- to | the breadth of the interorbital space. The number 

 of spines in the dorsal fin is usually between .'50 and 34 and that in the 

 anal fin between 20 and 25. The number of scales between the orbit 

 and the preopercular angle is 5 or 6 ; the number between the dorsal and 

 the tip of the snout is 13 to 15. The ventral is less than half tiie length 

 of the pectoral. 



The teeth are for the most part villiform and are arranged in numer- 

 ous Hues on both jaws, but there is an inner row of larger conical 

 teeth both in the upper and in the lower jaw. The arrangement is best 

 shown in a figure (pi. IV, fig. 17). 



Fig. 2. — Ojihidcephcdus harconri-baileri, sp. nov. 



Two colour-forms can be distinguished : — 



A. The whole body and head and the greater part of the fins are 



almost uniformly black, the ventral surface being onlj'' 

 slightly paler and a little mottled and the pectoral fins 

 showing slight traces of transverse banding ; a narrow 

 margin of red or reddish orange runs round the vertical 

 and the caudal fins. 



B. The head and body are gray or olivaceous, pale on the ventral 



surface and with incomplete dark < shaped markings 

 on the side (as a rule more or less interrupted), an indis- 

 tinct dark blotch at the base of the pectoral fin, pale 

 longitudinal Hues on the dorsal and vertical lines on the 

 caudal fin. 



Form B preserves to a large extent the juvenile colouration (])1. 11, 

 fig. 7), in which the markings are more distinct and the blotch at 

 the base of the pectoral is the centre of a well-defined ocellus. There 

 is never an ocellus on the dorsal or the tail. 



Our largest specimen (from the Inle Lake) is 22-6 cm. long, and 

 from all accounts the species does not grow more than 25 cm. long. 



Type-specimen. — (Form A) No. F 9439/1 Zoological Survey of India 

 (Ind. Mus.) from Fort Stedman. 



Distribution. — This species is abundant all over Yawnghwe and the 

 neighbouring states. We obtained specimens not only from the Inld 

 Lake but also from He-Ho (3,800 ft.) and Thamakam (4,200 ft.) ; it 

 lives on a muddy bottom in sluggish streams and also in all parts of the 

 Inle Lake, hiding itself as a rule among w^eds. Large numbers are 

 sold in the local markets. 



The species is named after His Horor Sir Harcourt Butler, K. C.S.I. , 

 CLE., I.C.S., Lieutenant-Governor of Burma at the time of our visit 

 to Yawnghwe, now Lieutenant-Governor of the United Provinces. 



