FRESH-WATER FISHES OF SIAM, OR THAILAND 539 



where it joins a short horizontal line extending backward, and 4 

 parallel lines on side of head below eye. 



Fins : Dorsal rays VI-I, 8 ; first 5 simple rays of nearly equal length 

 and less than 0.5 head ; origin of first dorsal fin over middle of extended 

 pectoral and midway between tip of snout and posterior end of base 

 of second dorsal ; free edge of second dorsal straight, the rays gradually 

 increasing in length so that last ray is twice length of first ; caudal fin 

 evenly rounded, fan shaped, shorter than head; anal I, 8, similar to 

 second dorsal; ventrals reaching halfway to anal; pectoral rays 15, 

 the base broad and scaly. 



Life colors : Entire body and liead except abdomen soft heliotrope 

 gray; back with about 5 indistinct darker bands, which extend 

 obliquely downward and forward to middle of side, the first band under 

 first dorsal fin; each scale of back and side with a narrow reddish 

 brown lunate spot; abdomen yellow-green; underside of head with 

 7 dark brown, strongly curved, parallel cross lines, the first one imme- 

 diately behind and folloAving curvature of the lower lip; first dorsal 

 grayish-green on basal half, heliotrope gray on free edge; with a 

 submarginal transverse band of white involving the first 5 membranes 

 and basally thereto a dark purplish gray band, which merges into the 

 green shade at the base of the fin ; second dorsal similar to first, but 

 with a row of elliptical dark purplish gray spots in the paler purplish 

 median band, a spot on each membrane; entire caudal fin uniform 

 pale apple green, with about 7 curved, wavy, cross stripes of heliotrope 

 gray ; anal pale grayish-blue at base, pale lavender distally, all rays 

 heliotrope gray; ventral and pectoral fins pale green to greenish 

 yellow. 



Type.—ThQ type (U.S.N.M. No. 119646) is a female, 3.9 cm. long 

 with well-developed eggs, taken in a canal in Bangkok May 28, 1931. 

 A paratype is U.S.N.M. No. 119647. 'It 



Remarks. — This species has as yet been found only in a small canal 

 within the city of Bangkok. Many specimens collected in May 1931 

 were kept in good condition in a small balanced aquarium in the 

 Siamese Bureau of Fisheries until December of the same year, when 

 they were preserved. During that time they ate mosquito larvae, 

 other small insects, and minute crustaceans, and throughout captivity 

 retained their strikingly rich coloration. 



The species exhibits minor variations in relative length of head 

 and depth of body, in squamation, and in details of coloration. 



Special permission to use her name for this species was obtained 

 from Her Majesty Rambai Barni, former Queen of Siam, and at a 

 reception and exhibit given by the Siam Society in honor of their 

 majesties on January 8, 1934, a water-color painting, made by the 



