ß^g Frits Johansen. 



As the fish grows, it is the preopeicular spines which develop 

 most, the occipital and frontal spines (especially the last) being more 

 like elevations on the uneven surface of the head (ca. 120 m), until 

 the fish has become adult and the four characteristic frontal "orna- 

 ments" are developed. 



The colour of the larvae from 1907 was as follows. The 

 anterior part of the body and (especially) the head were light 

 greenish-gray above; a little in front of the beginning of the ab- 

 domen this colour changes to whitish yellow, w^hich is continued 

 to the end of the tail. The abdomen is brownish-red with a few 

 grains of purple pigment. The gut silvery like the iris, which above 

 has the black pigment of the upper side of the head. The pupil 

 dark-blue. The whitish-colourless caudal region is iridescent with 

 reflected light. The black pigment is in the form of large chroma- 

 tophores collected in the occipital region and above the gut; a dorsal 

 and anal streak (along D^ and D- and A) of smaller (but yet distinct) 

 chromatophores; the former are more distributed over the whole of 

 the back and a little down the sides and are connected with the 

 occipital pigment in front. A distinct lateral streak of oblong 

 chromatophores passes from above the anus to the root of the tail; 

 between this streak and the anal streak the connection is fainter 

 than between the dorsal and lateral streaks. Fainter pigment on 

 the gill-covers, snout, base of the pectorals and upper parts etc. 



Of the larvae from 1908 the specimen of 10 mm has a similar 

 pigmentation, whilst that of 20 mm certainly had the same charac- 

 teristic pigment in the main (lateral, occipital, abdominal, dorsal 

 and anal pigment), but the pigment of the gill-covers is now 

 chiefly collected behind the eye and the dorsal pigment 

 chiefly at the beginning and end of C, D^ and D^ ; further, 

 there are now many and large chromatophores between the dorsal, 

 lateral and anal pigment, as also on the abdomen. There is also 

 pigment now on the tail-fin, connected with that at the caudal 

 peduncle. 



Specimens of ca. 150 mm are uniformly grayish-green with 

 lighter belly, the back, sides and the fins (except the ventrals) 

 being blackish-gray (weakest on the gill-covers and anal fin). Over 

 this we sometimes notice (see adult) irregular, black shields. The 

 ventrals are greenish-yellow, and neither the gill-covers nor the jaws 

 have the red colour of the adult. 



In the adults (over ca. 200 mm), of which I have taken a 

 coloured sketch (from the living animal), the upper side of the 

 head and the back are olive-green to brownish-black; the sides of 

 the trunk and tail are more light greenish-yellow, grading through 



