22 ON NEW OR INSUFFICIENTLY DESCRIBED FISHES 



pectoral and the lower third of the caudal, and transversely 

 with the median stripe by narrow cross-bars, which may be 

 interrupted or even absent. Head without spots ; snout 

 and opercles dull violaceous brow^n ; two narrow silvery 

 undulous bands from and above the corner of the mouth 

 to the opercle, upon which the lower curves uj)ward and 

 forms a junction with the upper ; they are also united by 

 a narrow bar along the edge of the preopercie, and the 

 upper bar is occasionally produced forward across the lip ; 

 there are sometimes two similar short bars in front of the 

 eye. Spinous dorsal wdth a black terminal spot on the 

 membrane of the third spine and with six narrow undulous 

 bars running obliquely upward and backward from its 

 base ; anal with an indistinct infrabasal band ; caudal 

 colorless, or with several obscure cross-bands, or with small 

 but distinct purple spots on its basal half inferiorly, and 

 always with, a wide terminal silver- edged violet band. 



Described from 4 Aru Island specimens in the A.F.A.Q. 

 Museum, the largest and type 120 millim. ; Cat. No. 986. 



BUTIS LONGICAUDA (De Vis). 



D. vi, 9 ; A. 9 ; P. 18 or 19 : Sc 29 or 30-10 oi 11, 

 Depth of body 4-7, of caudal peduncle 8-4, length of head 

 2-9, of caudal fin 4 in length of body. Depth of head 2-5, 

 width of head 1-66, length of snout 2-66, diameter of eye 5-75, 

 width of interorbit 4-25, length of maxillary 2-66, longest 

 dorsal ray 2-2, longest anal 2. length of pectoral 1-45 in 

 length of head. 



Snout greatly depressed, more than tmce the diameter 

 of the eye ; inter orbital region flat, broader in the male 

 than in the female or young* ; supraciliary ridge crenulate ; 

 maxillary varying much with age and sex. extending nearlj^ 

 to or slightly beyond the anterior border of the eye. 



Head a,lmost wholly scaly, the scales on the upper 

 surface small; loAver surface of head, extremity of snout, 

 nasal region, maxillaries. and a pair of narrow channels 

 extending from the snout along the frontal region, inside 

 the supraciliary ridges, to and beyond the postero-superior 

 border of the eve. and thence to the upper angle of the 



* In a fine male measuring 140 millim. the width of the interorbital 

 region is 3-75 in the length of the head, in a female of 135 millim. the 

 same measurement is 4-35. 



