89 



Til Sammenligning vedfojes et I'm- Maal af de 5 

 fuldt udvoxede Individer tru finmarken: 



For comparison are subjoined ;i few measurements 

 ut tlic 5 full-grown individuals from finmark. 



Totallængde 



Hovedets Længde .... 

 Overkjævens Længde. . . 

 Legemets Højde . 

 Kroppens Længde (Snuden 



til Anus) 



Halens Længde (Anus til 



Halespidsen ) 



(Skri.) 



575""" 



126- 



55- 



? 



220 

 360 



B. 

 Han. 



582 m " 



133- 



64- 



80- 



226- 



362- 



C. 



Hun 

 (tørr.) 



595 " 



128- 



56- 



?. 



255- 

 350- 



D. 



Hun. 



610""" 



1 4.". - 



68- 



84- 



242 - 

 371- 



!•:. 



ltotT.1 



622""" 



138- 



65- 



? 



250- 

 375- 



Beskrivelse. Legemsbygning. Nær beslægtet med 

 L. vahlii, fra hvilken den. som ovenfor nævnt, ef skilt ved 

 sin (dog blot i yngre Alder tydeligt) dobbelte Sidelinie. de 

 korte Kjæver. det altid forholdsvis store Hoved, den korte 

 Ganetatfdrække,' og Farven. 



Legemet er af typisk L//<'i»/rx-Bygning; den storste 

 Højde indeholdes hos de ældré Individer omtrent 7 — 8 

 Gange i Totallængden, hos Ungerne 9, eller endog 10 Gange 

 i denne, og Legemet bliver saaledes noget undersætsigere 

 under ( )pvæxten. 



Hovedet er forholdsvis stort, og har en hoj og stump 

 Snude, der er temmelig kort. Hovedet indeholdes fra 

 4. l ji til noget over 4 J / 2 Gange i Totallængden; hos intet af 

 Individerne har' Hovedlængdens Forhold til Totallængden 

 været under 4.7. selv hos smaa Unger. Hos 2 udvoxede 

 Han-Individer fra Finmarken er Forholdet 4,30 og 4,26, 

 hos en ligeledes udvoxet Hun 4,64 ; sammenlignes 2 noget 

 nær ligestore Individer af forskjellig! Kjøn, sees Hoved- 

 længden hos den yngre Han fra Nordhavs-Expeditionen at 

 indeholdes i Totallængden 4.41, hos den ligeledes yngre 

 Hun 4,53, ligesom hos den fuldvoxne Han fra Finmarken 

 4,26, hos Hunnen 4,64, saaledes at Hannen, hvad der ogsaa 

 var at vente, altid synes at have et større Hoved, end 

 Hunnen. 



Underkjæven er betydeligt kortere, end Overkjæven. 

 og dette er allerede særdeles stærkt fremtrædende hos det 

 mindste foreliggende Individ (med en Totallængde af blot 

 81"""). 



Overkjæven er altid kortere, end den halve Hoved- 

 længde. hvad der vil fremgaa af de ovenfor meddelte Ud- 

 maalinger. og naar tilbage under Midten, eller henimod 

 Bagranden af Øjet. Sammenlignet med L. vahlii maa saa- 

 ledes L. esmarkii siges at have et forholdsvis kort Ansigts- 

 parti. skjønt Hovedet idethele er større. 



De skaalformige Fordybninger langs Randen af Kjæ- 

 verne. der ere characteristiske for denne Slægt, ere stærkesf 

 synlige hos Ungerne. hvor Hovedets Hud er tyndest; i 

 Bunden sees her en tydelig og aahen Pore. men denne bliver 

 svagere fremtrædende hos de ældre. 



Den norske Nordhavsexpedition. Collett: Fiske. 



General Description. Structure of the Bod//. — 

 Nearly related to L. vahlii, from which, as above stated, 

 it is distinguished by a double lateral line (conspicuous 

 however in young specimens only), the short jaws, the 

 head, always comparatively large, the short series of palatine 

 teeth, and the colour. 



The body is of the typical I/ycodes structure; its 

 greatest depth equals.- in mature individuals, from l / 7 to ' ,„. 

 in young examples, not more than l / g or l / 10 of the total 

 length ; hence the body increases in thickness with the 

 growth of the fish. 



The head is comparatively large, and terminates in 

 an obtuse and elevated snout; the length of the head is 

 contained from 4 L / 4 to a trifle over 4 1 ,- times in the total 

 length; the proportion borne by the length of the head to 

 the total length was in no case under 4.7. not even in the 

 very young examples. In two full-grown males from Fin- 

 mark, the proportion is as 1 to 4.30 and 4.26; in a full- 

 grown female, as 1 to 4.64. If two individuals nearly 

 equal in size, but of different sexes, be compared together. 

 the length of the head in the young specimens obtained 

 on the Expedition will be found to be 4.41 in the male, 

 and 4.53 in the female; in the full-grown male trom Fin- 

 mark it is 4.26, in the female 4.64: hence the male, as was 

 indeed to be expected, has invariably a larger head than 

 the female. 



The mandible is considerably shorter than the upper 

 jaw, and this character shows very conspicuously even in 

 the smallest of the specimens examined (total length 'only 

 SI " u "\ 



The upper jaw is invariably shorter than half the 

 head, as appears from the measurements given above, ex- 

 tending back under the middle of the eye. or very nearly 

 to its posterior margin. Compared with L. vahlii, L. es- 

 markii has the region of the face comparatively short. 

 although the head itself is larger than in the former species. 



The bowl-shaped depressions along the margin of the 

 jaws are peculiar to this species: they are most conspicuous 

 in the early stages of development, when the skin on the 

 head is thinnest, terminating in a distinct and open pore; 

 as the growth progresses, they gradually become less distinct. 



1-2 



