,,, I.YCODIN.^v 



The lateral line begins above the upper notch of the gill opening; its pores to the number 

 of some twenty can be followed as far as the middle of the posteriorly extended pectoral; from this 

 point one can observe by good light a very weak light line bending down towards the anus and 

 further along the lower border of the tail; this fine line represents the ventral lateral line, but pores 

 can onh be seen here and there singly and indistinct. 1 believe I have seen weak traces of a medio- 

 lateral lateral line in the form of a few widely separated pores. The lateral line in this young 

 specimen is thus in the same stage of development as in the adult L. esmarkii ; in these the lower 

 (ventral) branch can as a rule be followed; so far as concerns the upper (mediolateral) branch, Collett 

 declares that it is always indistinct 1 ), and this I can confirm as only in one of the three adult 

 specimens at m\ disposal have I found it possible to trace some single oblong pores. 



Lastly, it may be added that this young specimen shows not the slightest trace of pyloric 

 appendages, which are also wanting in the adult L.esmarkii, as already mentioned (p. 28). 



All the characteristics displayed above lead to the conclusion that this small specimen from 

 the open sea off Finmark is a young stage of L.esmarkii from the coasts of Finmark. 



A p p e n d i x. 



After the foregoing had been written I have had the further opportunity of examining 6 

 specimens of /.. esmarkii obtained during my participation in the 1902 summer-cruise of the Michael 

 Sars to the seas of Shetland, the Fseroes and Iceland. The distribution of this species - hitherto 

 considered somewhat local has thus become considerablv extended. Some remarks on these specimens 

 may fittingly find a place here. 



The smallest of the specimens was taken in the Fyeroe Channel. The total length is i<S8 mm., 

 I mm. smaller therefore than the one referred to (p. 28 301 from the seas between Norway and Bear Island. 

 For the rest, they agree very closely, chiefly in regard to the most important proportions, as will be seen: 



L. esmarkii juv. from 



... , „ Nathorst- 



Mich, bars d 



"5° 2 l89 8 



Total length in 111111 



Length of the head in ■,. of the total length 



Distance between snout and anus 



Height over the anus — 



In the new specimen there are also 7 light bands. The foremost of these (neck-band) is 

 broken off at the middle of the back, so that it appears as a light spot on and over the edge of the 

 gill-cover, round the origin of the lateral line. The remaining bands have quite the same situation 

 as in the foregoing specimen; the second to the sixth have the distinct form of a A, only the seventh, 

 at the end of the tail, is unbranched. The scaly covering and the mediolateral lateral line are in 

 utial agreement; the ventral line however is distinct, not onh' from the neck clown to the anus, 



') Nvt Magaz. f. Naturvidensk. 29 Bd., [884, p. 77. Nevertheless, the figure in the work on the fishes of the Norvv. 

 North-Atlantic Expedition (PI. Ill, fig. 22) shows a clearly marked mediolateral lateral line. 



