243 



d d Q d 9 d Я 



Total length in ram 100 77 78 69 69 57 57 



The longest ray of 1^' dorsal fin in mm. 24 14 6 10 5.5 6.5 5 



" « 2°ä '. " » » 20 14.5 9,5 12 9 9.5 7 



It will be seen from this that the first dorsal fin is always some- 

 what lower in the females than the 2°'^ dorsal fin ; its height 

 is equal to the length of the snout (reckoned to the anterior 

 margin of the eye). In the males on the contrary the difference 

 between the height of the two fins diminishes as they get 

 older (in the three smallest ones from 3 — 2 — 0.5 mm.), and in the 

 largest male D.^ is even 4 mm. higher than D.'-^, though D.'-^ at 

 the same time has increased proportionately more in height 

 than in the females. The length of the longest ray in D.^ is 

 in the male of 100 mm. equal to the distance between the end 

 of the snout and the upper incision of the gill-opening; in the 

 male of 77 mm. equal to the distance between the same point 

 and the posterior border of the orbit; in the male of 69 mm. 

 and of 57 mm. equal to the distance between the end of the 

 snout and respectively the posterior margin of the pupil and 

 the anterior margin of the eye. 



There is also a great difference with regard to colour 

 pattern between males and females, especially in large specimens. 

 The before mentioned 100 mm. long male may serve as type 

 for the final colour of the male sex. The trunk is very dark, 

 chocolate coloured, with the exception of the belly which has 

 kept a yellowish colour though with a dark tinge here and there. 

 On this dark back-ground small white spots appear especially 

 along and below the lateral line ; also on gill cover and cheek 

 a few white spots are seen. The fins have likewise turned 

 dark almost soot-coloured with light stripes and spots. Along 

 the rays the dorsal fins are ornamented with eye-like spots 

 formed by a white centre and a dark ring; the anal fin has 

 slanting stripes of a pure white colour; the light transverse 

 stripes of the caudal fin and the pectoral fins are partly broken 



