LYCOIMN.li. 



3 1 



but also for a considerable distance along the underside of the tail. The pectoral fin has 23 rays and 

 is not indented at its posterior margin. Pyloric appendages are wanting. 



The others are medium-sized or larger specimens, the most important measurements of which 

 are the following: 



L. esmarkii from Mich.Sars C902 



3 $ £ \ $ £ 



Total length i 



Length of the head 



Distance between the snout and the anus 

 Height over the anus 



552 



I 20 



215 



The length of the head is therefore 21 23,2",,, the distance from the snout to the anus 

 37,5 39,9%, the height over the anus 10 -13,8% of the total length. 



The colouration of the three medium-sized individuals (371 383 nun.) can be derived from 

 that of the young individual referred to above. In the light vertical bands, whose number is 

 6 — 9, spots or stripes of the dark ground-colour have appeared, both on the dorsal fins and lower 

 down (Tab. Ill, fig. 2 b). The light neck-band is fully developed in one of these specimens and extends 

 from gill-cover to gill-cover, enclosing a dark stripe; in the second specimen the neck-band is restricted 

 to one, yet of good size, light spot on each side of the neck, enclosing a dark spot; in the third there 

 is only an ill-defined lighter part on the upper edge of the gill-cover. In the large specimens the 



light bands are still further resolved into festoon-shaped markings (Tab. Ill, fig. 2 c). 



The pectoral fins have 2^ rays in four specimens, 22 in the fifth; in none of them is there any 

 indentation of the posterior edge of the fin. In two of the specimens the dorsal fin has 115 rays, 

 the anal 97. 



The scaly covering has attained its full distribution, forwards as far as the neck and base of 

 the ventral fins, also on the unpaired fins to near their margin. 



After what has been said above, the lateral line presents the somewhat unusual, as it seems, 

 peculiarity that the mediolateral line is rather distinct in several of the specimens. 



The gut is lacking in pyloric appendages; in several specimens it was quite full of skeletal 

 remains of echinoderms (ophiuroids). 



Relation of L. esmarkii to L.vaklii. 



After Prof. Collett had in his later treatises withdrawn his earlier expressed opinion that /.. 

 esmarkii was the same species as the Greenland L.valilii Reinh., Prof. F. A. Sinitt and Dr. Miliar 

 IyOiinberg again took up the matter and declared themselves unable to separate the two forms from 

 one another. This is not remarkable in itself, since neither of these authors have had specimens ol 

 L.vaklii at their disposal; their acquaintance with this fish was restricted to what they could re. id 

 of it in Liitken and Collett. And their doubts concerning the independence of the two forms, might 

 be justified even more as some of the distinctions put forward by Collett are not constant. 



There is not the difference with regard to the length of the head, which Collett has mentioned, 

 namely that the head in L. esmarkii is on the whole souiewli.it longer than in L.valilii. Lonnbi 



