TUACHYPTEKIlJvK. 



115 



THE DEALFISH OR VAAGMAER (.sw. vogmaken; Nonw. solyqveiten). 



TUACHYPTEHU.S AKCTICUS. 



Fig. 83. 



The greatest deptfi of tlic IxkJi/. irh'ich Is deepest at a polut nearer the rent than the head or even at the vent 



itself, undergoes even relatire increase with agi- in specimens more than 1 metre in length, and is wore than 



15 % (on average aliont 17 %) of the length of the t)odg, excluding the caudal fin. 



^-««^3|c' 



■■% 





-li^pj* 



Fig. 83. Trachi/ptems arctictis, 9j "''tl' eggs of a microscopical size, from Vargo (the southern island-belt of Gothenburg), 



the 22nd of April, 187 



of the natural size. 



R. br. 6"; D. (5 1. 6), 150— 180; A. 0: P. (1) U''; V. (8 1. O)'"; 

 C. 8 + (6): L. lat. 94^101; Vert. 07 — 100''. 



Syn. Vogmere 1. Vogmar. Lepiuriis, Olafsen", 1. c. et tab. XLIII: 

 Trichiurus Lepturtts, Mohk, Isl. JVatiirh., p. 63. 

 Gymnogaster arctictis, BeSkn, D. Vid. Selsk. Skr., N. Saml., 

 vol. Ill, p. 408, tab. B, figg. 1—3; Cuv. (Gymiietnis). 

 Rcgn. Anim., ed. 2, torn. II, p. 219; Fabee (Gymnogaster), 

 Fische Isl., p. G6: Flem. {Gymnogaster), Loud. Mag. Nat. 

 Hist., vol. IV (1831), p. 215, fig. 34; ^ilss., Prodr. Ichtli. 

 ScancL, p. 107; Id. (Tracliypterns), Skand. Fn., Fisk., p. 

 162; Gthr, Cat. Brit. Mus., Fish., vol. Ill, p. 305; Coll., 

 Forh. Vid. Selsk. Christ. 1874, TiU.Tgsh., p. 78; ibid., 1879, 

 No. 1, p. 59: N. Mag. Naturv. Clirist., Bd. 29 (1884), p. 69; 

 WiSTH., Zool. Dan., Fiske, p. 17, tab. Ill, fig. 7: Day, 

 Fish. Gt. Brit., Irel, vol. I, p. 217, tab. LXIII; Ltkn, 

 Vid. Meddel. Naturh. For. Kbhvn 1881, p. 190: Sp. Schx., 

 Forh. Vid. SelsU. Christ. 1872, No. 15 cum tab.: Lillj.. 

 Sv.. Norg. Fn., Fisk.. vol. I, p. 462. 



Bogmarns islandicus, Bl., Syst. Ichth. posth., ed. Schn'., p. 

 518. tab. 101 (ex BbOnn.); Reid (Vogmarus), Ann. Mag. 

 Nat. Hist., ser. 2, vol. Ill, p. 456. 

 Trachypterus Bogmarns, Cuv., Val., Hist. JVat. Poiss., vol. X, 

 p. 346; Reish. (Tr. Vogmarus), D. Vid. Selsk. Naturv., Math. 

 Afh., Deel 7, p. 65 cum 2 tab.; Stuwitz (Tr. sp. innom.), N. 

 Mag. Naturv., Bd. 2 (1840), p. 277, tab. Ill; Kb., Danm. 

 Fiske, vol. I, p. 292; Val. (Tr. Bogmarns). Voy. Isl. Groenl. 

 (Gaim.), Zool. Poiss., tab. 12; Lillj., (Tr. Vogmarus), Vet.- 

 Akad. Handl. 1850, p. 331; Mgkn, Ofvcrs. Vet. -Akad. Forh. 

 1867, p. 261; Esm., Forh. Naturf. Mode Christ. 1868, p. 522. 



Ohs. The only tenable distinction hitherto given between this 

 species and its Mediterranean relative, Trachypterus iris, is adopted 

 in the above specific diagnosis; but the validity of even this cha- 

 racter, as shown by the wording of the diagnosis, is only relative. 

 Our ignorance of the juvenile stages of Trachypterus arcticus renders 

 this character still more doubtful, and our present knoniedge on this 

 point is most accurately expressed by the following table of averages, 

 derived from the observations of LCtken and Emery: 



I 



■" 7. according to Reid. 



* 10 — 13, according to Lilljeborg. 



' 6, according to Reinhardt and Lutkkx. 



■* According to LuTKEN. 



