34 THE DISCOBOLI. 



1880, p. 485) the young of Cyclopterus spinosus. Of these stages, the 

 youngest correspond to the oldest stage of Cyclopterus lumpus here figured, 

 the oldest measuring over 45 mm. in length." 



EUMICKOTREMUS. 



The most important distinctions as yet pointed out for Eumicrotremus 

 are the irregularity of the large tubercles on the flanks, and the fact that 

 the first dorsal is not hidden so early in life as in Cyclopterus lumpus. The 

 eyes and disk are larger. The genus was founded by Gill, 1864, upon 

 Cyclopterus spinosus of Midler. 



Eumicrotremus spinosus. 



Plate XI. Figs. 1-3. 



Cyclopterus spinosus Mull., 1776, Prodr. Zool. Dau , p. ix; Fabr., 1780, Fauna Groenl., 134, — 1798, 

 Nat. Hist. Selsk. Skr. i Kjob., IV. pt 2, 27, pi. ix. fig. 2; Bonn., 1788, Ichth., 27; Walb., 1792, Art. 

 Gen. Pise, 485; Donnd., 179S, Beitr.,814; Wilh., 1799, Unterh. Naturg., IX. 131; Sch., 1801, Bl. Syst. 

 Ichth., 198, pi. 40; Sonn., 1803, Hist. Poiss., V. 256; Cuv., 1817, R. An., II. 227, — 1829, R. An., II 

 346,-1836, R. An., I. 573; Faber, 1S29, Naturg. Fische Islands, 53; Rich., 1836, F. B. Amer., III. 

 263; Wilson, 1838, Ichth. in Encycl. Brit; Reinh., 1S38, Ichth. Bidr. Groenl. Fauna, 10S, 116, 134; 

 Krby., 1847, Nat. Tidsskr., III. 262; Gaim., 1851, Voy. Skand., Poiss., pi. 4, fig. 2; Gill, 1861, Cat. 

 Fish E. C. N. A., 47; Gthr., 1861, Cat, III. 157, — 1S77, P. Z. S. Loud., 293, 476,-1880, Introd. 

 Study Fish., 485, fig, — 1SS7, Challenger Rep., XXII. 06; Malmg., 1864, Om Spetsb. Fisk-fauna, 

 Oef. k. Vet. Ak. Forh., 509; Jord. & Gil., 1882, Bull. 16 U. S. Mus., 746. 



Eumicrotremus spinosus Gill, 1864, Pr. Phil. Ac, 190,-1873, Cat. Fish E. C. N. A., 21,-1891, 

 Pr. U. S. Mus., XIII. pi. xxix. fig. 2 (fr. Collett); Bean, 1879, Bull. 15 U. S. Mus., 115; Goode & 

 Beau, 1S79, Bull. Essex Inst , XI.. p. 12 of ext. ; Coll., 1880, Norske Nord.-Exp., Fiske, 67, pi. 2, fig. 13, 

 J. & G„ 1882, Bull. 16 U. S. Mus., 957; Dresel, 18S4, Pr. D. S. Mus., VII. 219; Stein., 1886, Jan 

 Mayen Exp, III., Fische, 106; Jor., 1887, Rep. U. S. Fish Comm., 1885. 



Le Cydoptere e'pineux LaC, 1800, Hist. Poiss., II. 59. 



Lumpus sjjinosus Stor., 1846, Synops., 482. 



B.'6; D. 6/11; A. 10 ; P. 21. 



From the material before us this species appears to be less compressed 

 than either C. lumpus or C. oibis. In a transverse section, in front of the 

 first dorsal, it is nearly round, whereas in either of the others such a sec- 

 tion is considerably higher than wide. Compared with them in regard to 

 length, it may be described as elongate. How much of this difference in 

 form is to be credited to individual variation, we cannot at present deter- 

 mine. Bearing in mind the variations seen in a lot of specimens of 

 C. lumpus, it does not seem at all impossible that C. spinosus and C. orbis 

 may have to be united, as has been suggested by several authors; but 



