BIIIANG TILL K. SV. VET.-AKAD. HANDL. BAND 27. AFD IV. NIO 4. 5 



ti: distance from the poiiit of tlie nose to the beginning of the 



anal fin, 



tiy: distance from the point of the lower jaw to the beginning 



of the anal fin, 



v: length of the anal fin to the tip of the last (caudal) rays, 



v^: length of the anal fin to the tip of the tail (without candal rays), 



x: length of the longest ray in the anal fin, 



altp: height of the body at the pectoral fins, 



altu: » » » » » » beginning of the anal fin, 



altuv: » •» » » » » niiddle of the length of the anal fin. 



After the above-named principles, laid down by Reinhardt, 

 I have divided tbe mäss of specimeiis of Lycodes into six 

 groups; and for tliese it is not difficult to find respective 

 uames, chosen from the mäss of synonyms in this genus, 

 althoiigh \ve may not expect to find any complete corres- 

 pondence to the cbaracters or descriptions given by the 

 authors. The group of Lycodes Vahlii I have thus divided 

 into the three forms: gracilis, pcdlidus and Vahlii typicus; the 

 group of Lycodes reticulatus is divided into frigidiis, seniinu- 

 dus and retictdatus typicus. To these in the tables of mea- 

 surements are added two specimens of the Lycodes (Lycen- 

 clielys) Verrillii. 



I: Length of the head (h). 



From the tables of measurements in the first instance 

 it is very easy to find, what however already is known, that 

 the widest gap in the per-cent-numbers of the relation of 

 the length of the head to that of the body lies between 

 Lycenchelys and the true Lycodes. Still it is to be remem- 

 bered, that according to Goode and Bean,^ »the old males of 

 L. Verillii are transformed almost beyond specific recognition 

 by an extraordinary development of the entire head in ad- 

 vance of the eyes;>. Through this deformity and through the 

 intervening »species» L. Sarsii,- the named gap is filled; but 

 setting aside the abnormities, in the manner of development 

 we find a more important difference between the two sub- 

 genera. With Collett, who has given the measurements of 



1 Oceanic Ichthyology, p. 310, pl. LXXIX. fig. 277. 

 ^ Cfr. Ann., Mag. Nat. Hist., ser. 7., vol. V, p. 58. 



