30 



LYCODIN.E. 



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

 of some t\vent\- can be followed as far as the middle of the posteriorly extended pectoral; from this 

 point one can obser\-e b\ good light a \-er\- 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 oulv be seen here and there singh and indistinct. I believe I have seen weak traces of a medio- 

 lateral lateral line in the form of a few wideh separated pores. The lateral line in this \-oung 

 specimen is thus in the same stage of de\'elopment as in the adult /,. esmarkii ; in these the lower 

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

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

 specimens at nu' disposal have I found it po.s.sible to trace some single oblong pores. 



Lastlv, it ma\ be added that this xoung specimen shows not the slightest trace of pyloric 

 appendages, which are also wanting in the adult L.esinarkii, 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 voung 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 L. esmarkii obtained during m\- participation in the 1902 summer-crnise of the Michael 

 Sars to the seas of Shetland, the FiEroes and Iceland. The distribution of this species — hitherto 

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

 ma\- fittingly find a place here. 



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

 4 mm. smaller therefore than the one referred to (p. 28 301 from the seas between Norwa>- and Bear Island. 

 For the rest, thev agree very closeU', chiefly in regard to the most important proportions, as will be seen: 



Total length in mm. 



Lengtli of the head in " o of the total length 



Di.statice between snout and anu.s . — 



Height over the anu.s — — 



L. esmarkii juv. from 



,,. , ., I Nathorst- 



«Mich. bars ! g^^^ 



1902 ! tSoS 



9,6 I .S,g 



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 Hght 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 ha\e the distmct form of a A, only the seventh, 

 at the end of the tail, is unbranched. The scal\- covering and the niediolateral lateral line are in 

 e.s.sential agreement; the ventral line however is distinct, not only from the neck down to the anus, 



M Xvt Magaz. f. Naturvidensk. 29 Bd., 1.SS4, p. 77. Nevertheless, the figure in the work on the fishes of the Norw. 

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



