lA'CODIN.B. 27 



Other differences are also present, which jnst as distincth' declare against the two forms being- 

 identical. The American specimen, for example, has much larger scales so that the nnmber in the 

 vertical line from the anus to the base of the dorsal fin amonnts to 34; whereas, on the same line in 

 a specimen of L. fngidus from the Polar Depths there are ca. 55 scales, although its total length is 

 the same. Lastly, the American form has 23 rays in the pectoral fins whilst the number in the 

 species from the Polar Depths is at most 21. 



I can come to no other conclusion therefore, than that we have to deal with two species well 

 separated in important structural features. The American form must conseqnenth' be renamed, and 

 convenientl\ L. at/ant/cns^], which cluiracterises it zoo-geographicall\ in contrast to the L. frigidus of 

 the ice-cold Polar Depths. 



For the rest, it must be left to the American ichth\ologists to give us further enlightenment 

 upon this species since they have of it a large material at their disposal. 



Lycodes esmarkii Collett. 



Tab. HI, I'iK- 2 «. 1'. c. 



1869. Lycodes Vahli Esmark, Bidrag til Finmarkens F'i.skefauua; Forh. \-. Skand. Naturf. lo. Mode i 



Chria. 1868, p. 524. 

 1875. [..esmarkii Collett, Norges Fiske; Tillsegsh. til Vidensk. Selsk. Forhandl. Chria. 1874, p. 95. 



1879. Z-. z'a/i/zy Collett, Meddelelser oni Norges Fiske i Aarene 1875--78; Forhandl. \'idensk. Selsk. Chria. 

 1879, No. I, p. 62 (partim), 



1880. L. esmarkii Collett, The Norw. North-Atlantic Expedition, F'ishes, p. 84 (partim), PL III, F'ig. 22. 

 1884. L. esmarkii Collett, Meddelelser om Norges Fiske i Aarene 1879 — 83; Nyt Magaz. f. Natnrvidensk. 



29 B., p. 73 (partim). 

 1891. L. esmarkii Lilljeborg, Sveriges och Norges F'iskar, II, p. 6 (partim). 

 1895. L. Vahli? Smitt, Skandinavieus Fiskar, II, p. 613 (partim). Fig. 149. 

 1899. L.vahlii honnheiXg, Bihang K. Sv. Vetensk.-Akad. Handl. Hd. 24, .'Xfd. I\', No. 9, p. 23. 

 1901. L. esmarkii Jensen, Viden.sk. Medd. Naturh. P'oren. Kbhvu., p. 213. 



Height over the anus amounts to 8,9 — 14,4",, of the total length. Length of 

 the head in adult males is 21 — 24°,,,, in adult females and voung iudi\i duals 19,2 — 

 21,9% of the total length. The tail is distinctly longer than the head and trunk 

 together, as the distance between the snout and the anus amounts to 37,5 — 42,9 "/o 

 of the total length. The posterior margin of the pectorals rounded without 

 indentation. Colour brown, with a light stripe oxer the neck (or a light spot on each 



') I ought however to explain, that the new specie.s has point.s of connection with the Lycodes terra-nova: from the 

 banks of Newfoundland, 155 m., founded by R. Collett in 1S96 (Resultats Camp. Scient. .\lbert I, Fasc. X, p. 54 . But in two 

 specimens of similar size (370 & 310 ram.) to the above named L. atlanlicus, the length of the head is 18,9 -18,4 "o, the distance 

 from snout to anus 35,1 — 35,5 °o, of the total length. In addition, there is a characteristic difference in regard to the teeth- 

 equipment of the palatines: in L. ierrx-novce there are only 3 — 5 teeth on the palatines, and the whole row is scarcely half 

 so long as that on the intermaxillaries ; whereas, in L. atlaniicns there are lo teeth on the palatines, and the whole row is 

 more than double that on the intermaxillaries. 



