i85 

 6. Cypsilurus hexazona (Blkr.) 



Exococtiis hexazona Blceker, Nat. Tijdschr. Ned. Indie IV. 1853, p. 206. — 

 Ned. Tijdschr. Dierk. III. 1866, p. 118. — Atl. ichth. VI. 1866— 1872, p. 73. 



D. 10 — II; A. 9 — lO; P. 1. 13; V. 6; L.l. circa 48. 



Height about 4V4, about 6 in length with caudal. Head about 

 4, somewhat more than 5 in length with caudal. Eye about 2, 

 '-/.J in postorbital part of head and about equal to interorbital 

 space. Teeth minute. Palate edentulous. Origin of dorsal far 

 before that of anal and much longer than lastnamed fin. 

 Pectorals reaching to posterior part of dorsal. Ventrals much 

 longer than head, nearly reaching to base of caudal, their 

 origin a little nearer to branchial opening than to base of 

 caudal. Caudal deeply forked. Bluish green above, silvery below. 

 Six brown crossbands on the body; the first through the eye, 

 2"^ dorso-pectoral, 31"^ and 4th dorso-ventral, 5th and 6th dorso- 

 anal. Vertical fins hyaline, dorsal with a broad brown margin, 

 anal and lower caudal lobe brown at their tip; pectorals and 

 ventrals brownish or blackish violet, pectorals with a trans- 

 verse hyaline band in their middle. Length of single specimen 

 known 54 mm. [After Bleeker, not seen by us]. 



Habitat: Banka. 



This is the young stage of some species close to C. alti- 

 pennis and nigricans, from which it seems to differ in the low 

 number of dorsal rays. 



7. Cypsilurus bilobatus n. sp. 



Exocoettis fiiirains M. Weber, in Semon, Zool. Forschungsreise, V. 1895, p. 274 

 (Jenaische Denkschr. III. 1895, P- ^^4 (°^c Mitchell). 



D. 13; A. 9 — II; P. 1. 12; V.6; L.l. circa 50; L. tr. 1^. 



2 



Compressed, the breadth of the body going 1.7 in its height. 

 Height 5, more than 6 in length with caudal. Head 4, more 

 than 5 in length with caudal. Eye 2.7, less than postorbital 

 part of head, which is equal to flat interorbital space. Snout 

 1.4 in eye. Teeth conical, pointed, in one or two rows in the 

 jaws and in a small patch on each side on the palatines. At 

 each side of corner of mouth the lower lip has a broad, ribbon- 

 like barbel, whicih is somewhat longer than half length of 

 head. Origin of anal opposite to 5''^ dorsal ray. Origin of dorsal 

 separated by 32 scales from occiput. Pectorals reaching to poste- 



