20 LYCODIN^. 



Iceland specimens, cf. p. 15 and p. 17 (see also Tab. I, fig. 2 b [?] and fig. 2 c [$]; Tab. II, fig. i a [S] and 

 fig. I b [?]). On account of the greater length of the head (which shows almost to an equal degree 

 on the pre- and post-orbital portion) the profile in the males varies also with age; the upper margin 

 is straightened out and forms from the eye forward a faint, sloping line (see Tab. I, fig. 2 c and Tab. II, 

 fig. I a); it is characteristic of the females (and the young individuals) that the upper margin from the 

 eye forward declines somewhat sharply towards the snout (see Tab. I, fig. 2 b and Tab. II, fig. i b, also 

 fig. 2 a. Tab. I of a young individual). Farther, the head of the males is broader over the cheeks than that 

 of the females (cf. text fig. i, 3 and fig. 2, ?), which has already been remarked by Collett in L.gracilis;>. 

 Here mav be added also that in the older males, the row of teeth on the intermaxillary becomes 



^W" 



Kig. I. L. valilii c?. 



Fig. 



L. vahlii 9- 



longer than that on the palatals, whilst in the females the row on the intermaxillary is only of the 

 same length or even shorter than that on the palatals. 



Concerning the colour, Collett states that old males seem as a rule to be more uniform than 

 the females usually are at the same stage. The same holds also, but in greater degree, for the 

 specimens from Greenland. 



Reproduction. 



According to Collett, L.vahlii (^L. gracilis.) spawns in the Skager Rak from July to October; 

 the greatest number of eggs he found in a female was 30—48 and their maximum size was reckoned to 

 4 mm. in diameter. In a female 210 mm. long, taken on July 8th, 1899 at Seydisfjord on the east coast 

 of Iceland, I find on the contrary not less than 93 eggs, whose size is 4,5 mm. in diameter (in addition, this 

 female contained some individual eggs, obviously late in development, and numerous small eggs reserved for 

 the next spawning period). The Greenland specimens do not throw much light on the breeding conditions, 

 partly on account of the bad state of preservation, partly because data with regard to the catch are 



