254 



been doubtful with regard to species if the specimens in que- 

 stion were not quite small. 



Of distinguishing characters two at any rate prove to be 

 «good»: L.liparis has a much more lengthened form of 

 body, and a larger head than L. fabricii. I have taken 

 12 specimens^), 78 — 207mm. long, of L.liparis for purposes 

 of measurements, and 10 specimens-) of L. fabricii^ 76 — 169 mm. 

 long. The height of the body above the middle of the suctorial 

 disc amounts in L. liparis to 14.9 — 20.2 % of the total length, 

 the length of the head (measured from the end of the snout 

 to the end of the opercular flap) to 21.2—24.6%. In L. fabricii 

 the proportions are relatively 20.5— 25.3 '^/o and 25.4— 28.6 o/o^). 



The pectoral fins are also, as has often been mentioned, 

 shorter in L.liparis than in L. fabricii; their length (reckoned 

 from the place where the fin gets clear of the body) amounts 

 in the former to 14.5— 17 "/o, in the latter to 17— 22.5 "/o of 

 the total length. 



The size of the eyes to which had been attached a con- 

 siderable importance with regard to the separation, is on the 

 contrary subject to great individual variation. To be sure the 

 eyes are as a rule comparatively small in L. liparis, their 

 horizontal diameter generally amounting to 2.8 — 3.8 °/o of the 

 total length, but it can rise to 4.8 ^!o ; and in L. fabricii the 

 proportion is generally 4.1 — 6.7 %, but can sink as low as 

 3.7 o/o. 



6 from West-Greenland, 2 from East-Greenland, 3 from Iceland, 1 from 



Norway. 



2 from West-Greenland, 6 from East-Greenland, 1 from the Kara-Sea, 



1 from the northern Norway (Porsangerfjord in the East-Finmark; sent 



to me by Prof. Collett as "L.liparis»). 



Hereby must however be remembered that these characteristics cannot 



very well be applied to young specimens ; in these the front part of 



the body is namely comparatively high also in L. liparis, and the 



relative length of the head diminishes in L. fabricii, sinks namely (in 



specimens of ca. 40 — 47 mm.) to 25.4—25.1 "/o of the total length. 



