6o 



2. Dorsal deep black in the middle of its 

 anterior part. No bands on caudal. Ten 



scales between dorsal and occiput. . . . R. dorsiocellata p. 68. 

 B. Origin of dorsal in or behind middle between 

 snout and hindermost caudal scales, always 

 behind origin of ventrals. 



1. Dorsal much nearer to anal than to ventrals. R. rutteni p. 68. 



2. Dorsal in the middle between ventrals and 

 anal or somewhat nearer to ventrals than 

 to anal. 



a. Frontborder of anal with a black patch, 



sides of body uniform R. bankanensis p. 69. 



b. Large dark patches on the sides above 



pectorals and anal R. kalochroma p. 70. 



c. A black band on sides from snout to caudal. 

 a. Pectorals longer than or at least equal to 



head R. einthoveni p. 72. 



/3. Pectorals shorter than head. 



a'. Origin of dorsal opposite to I2th 



or 1 3th scale of lateral line. L. 1. 



32 33 R. cephalotaenia p. 74. 



b' . Origin of dorsal opposite to loth 



scale of lateral line. L. 1. 25 27. R. jacobsoni p. 75. 



d. Black band along the sides never conti- 

 nued on head and often reduced to a 

 praecaudal spot or a spot below dorsal. 



Mostly a spot above base of anal present. R. lateristriata p. 76. 

 a. Band along sides present. L. 1. 26 30. forma typica p. 76. 

 /3. Band reduced to a praecaudal spot. 



L. 1. less, decreasing to 24 var. sumatrana p. 77. 



7>. Band reduced to a spot below dorsal. 



L. 1. 24 29 var. elegans p. 78. 



cT. Lateral band rather narrow, a band 



at the lower surface of the caudal 



peduncle, bifurcating forwards along 



the base of the anal. L. 1. 29 .... var. trifasciata p. 78. 



B. Lateral line incomplete, 7 rows of scales 

 between the lateral lines. 



I. Height 6 times in total length. Least height of 

 caudal peduncle more than twice in length of 

 peduncle. L. 1. 32 33. Twelve scales round middle 

 of caudal peduncle R. pauciperforata p. 78. 



