942 



SCANDINAVIAN I-ISIIKS. 



Lap., cett. Poiss.. tali. Ifi, fig. 2; Id., Naturli. Tidskr. Kblivn, 

 ser. 2, vol. II, p. -I'M); Xii.ss., .'ikatid. Fna, Fish, p. 483; 

 GtiM!, C>it. Brit. Mi(.^., F/.o//., vol. V, p. 407; Id., Dee]} 

 Sea Fish., Chall. E.xpod., p. 196; Ltkn, Vid. Meddel. Nntiirli. 

 For. Kbbvn 1891, p. 203". 

 Scopelus MiilUri, Coll. (nee Gmel.), Forh. Vid. Selsk. Cliniia 

 1874, Tillsegsli., p. 1,52; 1878, No. 4, p. 23; No. 14, p. 

 104; 1879, No. 1, p. 84; Id., N. Nordh. Exped., Zool., 

 Fiske, p. 158; (?) Br.-Goode, 15ean, J3u11. Mus. Comp. Zool., 

 Ilarv. Coll., vol. X, p. 222; Bk.-Goode, Fisher., Fisher. 

 Industr. U. S., tab. 203; Day, Nature, vol. XXXIV, Oct. 

 14, 1886, p. 571; (?) A. Agass., Bull. Mus. Comp Zool., 

 vol. XV, p. 33, fig. 219; Lillj., Sv., Norg. Fna, Fish., 

 vol. Ill, p. 20. 



The Arctii' Scopelus seems never to attain the size 

 of the pveceding species. Kkdyeii had specimens from 

 Greenland 46 — 96 mm. in length. The only specimen 

 we have been able to examine, kindl)' lent us Ijy the 

 Museum of Bergen, lias probably measured 77 or 78 

 inm., though its length cannot be stated with certainty, 

 tlie caudal fin being Ijroken off sliort. 



The difference from the Greater Scopelus is mani- 

 fested in the very form of the body. The body is 

 deepest at the occiput or just behind this point; and 

 the depth then decreases almost rectilineally to the base 

 of the caudal tin, the profile of the head being arcuate 

 both above and below, with the tip of the snout about 

 half^vay up. The body is also thickest at the occiput 

 and shoulders, growing regularly thinner towards the 

 base of the caudal fin. The sides of the body are flat 

 and parallel, back from the eyes. The dorsal margin 

 is convex, as ^vell as the top and bottom of the head, 

 but the under surface of the abdomen is flat. The 

 greatest depth of the body, in in-oportion to its length, 

 is only slightly greater than in tlie preceding species, 

 in our specimen little more than 21 ?o of the length 

 of the body excluding the caudal fin'; but the thick- 

 ness is perceptibl)- greater, nearly 1 3 '/g % of the length 

 of the body excluding the caudal fin, so that the great- 

 est thickness is here nearly '"''3 (63' o %) of the great- 



est depth'. The least depth of the body, on the other 

 hand, is less, being only slightly more tlian ' 3 (in our 

 specimen 35"2 %'') of the greatest depth. 



Owing to the short form of the body, the length 

 of the liead is also relatively greater, in dur specimen 

 29'2 % of the length of the body excluding the caudal 

 fin', in spite of tiie fact that the postoi'bital length of 

 the head is distinguished in this comparison just for 

 its smallness, measuring only lb % of the length of the 

 body excluding the caudal fin-', and but slightly more 

 than half (in our specimen 51'.5 %") of the entire length 

 of the head. The eye, on the otiier hand, is compara- 

 tively larger, its longitudinal and vertical diameters, 

 which are equal to each other, measuring ' ,„ of the 

 length of the body excluding the caudal fin''. In front, 

 at the round slope towards the snout, the forehead is 

 rather deeply concave, but furnished with the same 

 sharp, longitudinal carina at the middle as in the pre- 

 ceding species. The gape is smaller and somewhat more 

 ascending than in the Greater Scopelus. The difference 

 in size is indeed hai'dly perceptible in proportion to the 

 length of the body, the length both of the upper jaw 

 and the lower being V.-, of that of the body excluding 

 the caudal fin'; but in proportion to the length of the 

 head this difference is all the greater, the jaws here ex- 

 tending only a little behind the perpendicular from the 

 posterior orbital margin. The length of the snout is 

 more than ^4 (24 %■') of that of the jaws. The lower 

 jaw projects slightl}' beyond the tip of the snout, where 

 its point fits, when the mouth is closed, into a cavity. 

 The maxillary on each side extends a little further back 

 than the intermaxillary, the narrow hind part of which 

 lies outside and above the lower margin of the posterior 

 extremity of the former, which here expands into a 

 triangle, truncate behind, and thus forms the hindmost 

 portion of the margin of the upper jaw. The branches 

 of the lower iaw grow even further in\vards than in 



" LuTKEN supposes witb Lilljeboiig that "Collett has shown tliat Strum's coinnuinicaliou to 0. F. MOller was based upon his 

 (StrOm's) drawing" ; whereas it appears, from Collett's own quotation from Str6m's manuscript, that the said communication must have had 

 reference to Maarolicus Mulleri. StrOm sent his figure and description (with Maiirolicus characters) to MOller "more than 20 years before 

 1791" (see Skrivt. Naturh. Selsk. 1793, p. 15); but did not discover his first specimen of Mi/ctophiim (jlaciale until 1774 (according to the 

 manuscript quoted by Collett). 



'' Answering to 20' j % in the preceding species. 



' Answering to 57 — 58 % in the preceding species. 



'' Answering to about 46 % in the preceding species. 



' Answering to 27 — 26 % in the preceding species. 



/ Answering to 18 — 16 % in the preceding species. 



' Answering to 62 — 66 % in the preceding species. 



'' Answering to 7 — 6 % in the preceding species. 



' Answering to 21 — 21','., % in the preceding species. 



-' Answering to 15 — 18 % in the preceding species. 



