1884.] GENERA SICYDIUM AND LENTIPES. 169 



and a half times in the total length. Dorsal spines short, projecting 

 above the membrane ; the fourth, which is the longest, is not so hio-h 

 as the body ; second dorsal not so high as tbe body. Colour 

 reddish-brown, with about six vertical darker bands on the body, 

 wider than the ground-colour; there are also some dftrk spots; its 

 under surface is dirty yellowish brown ; fins nearly black, with a 

 light, nearly white edge. 



The largest specimen measures 2j inches (Day). 



Hab. Burmah. 



22. Sicydium microcephalum, Bleeker. 



Sicydium microcephalum, Bleeker, Java, ii. p. 437 ; Giinth. Cat. 

 Fish. iii. p. 95. 



Sicyopterus microcephalics, Bleeker, Versl. Ak. Amst. (2) ix. 

 p. 2r8. 



D. o^ji. A. jgijj. L. lat. 60. L. trans. 15-16. 



(Teeth in the upper jaw tricuspid ?) 



A row of papillae on the gum heueath the upper lip ; horizontal 

 teeth conspicuous. 



The total length of the body (without the caudal) more than five 

 times the length of the head ; the width of the head is greater thao 

 the height, and four fifths of the length. The height of the body is 

 more than one sixth of the length. Scales on the occiput, neck, and 

 anterior part of the body much smaller than the rest. The diameter 

 of the eye is about one fourth the length of the head, and one half 

 the interorbital space. The maxilla extends to the vertical from the 

 anterior margin of the eye. The length of the pectoral is greater 

 than the length of the head ; the length of the caudal is one and a 

 half times the length of the head, and is contained four and a half 

 times in the total length. The second, third, and fourth dorsal 

 spines are produced into subequal filaments considerably higher than 

 the body ; second dorsal higher than the body. Colour, body deep 

 violet above, with longitudinal series of yellow spots, yellowish 

 below ; dorsal, caudal, and pectoral fins violet, irregularly dotted 

 with black ; pectoral yellow-edged. Anal orange-violet, with a dark 

 marginal band. 



The longest specimen measures 4| inches (Bleek.). 



Hab. Rivers of Banten (Java) ; Celebes? 



23. Sicydium griseum, Day. 



Sicydium griseum, Day, Journ. Linn. Soc. Zool. xiii. p. 140. 

 D. 6i. A. 11. L. lat. 80. L. trans, ca. 25. 



(Teeth in the upper jaw tricuspid ?) 



Horizontal teeth conspicuous. 



The total length of the body (without the caudal) is four and 

 three quarter times the length of the head; the width of the head 

 equals the height. The height of the body is contained rather more 

 than five times in the length. Scales strongly ctenoid, of irregular 



Proc. Zool. Soc— 1884, No. XII. 12 



