SCOMBROLDS. 
97 
the current, laws of nomenclature enjoin the employ- 
ment of the name Orcynus for this genus. The same 
name was also used by Cuvieu on one occasion 0 for a 
subgenus which included the long-finned Tunny (Albi- 
core: Orcynus germo), but was afterwards'' rejected by 
him on the ground that all the Tunnies should be re- 
ferred to one single genus ( Thynnus ). It has, how- 
ever, been subsequently restored by Gill 0 for the rea- 
sons given above. 
The subgenus Orcynus contains the largest mem- 
bers of the family and those in many respects with 
the most marked characters within the limits of the 
Mackerel-type; but according to Lutken’s well-founded 
arguments we may accept only two species as known. 
One of these has wandered fairly often within the 
boundaries of the Scandinavian fauna. 
THE TUNNY (sw. tunfisken or maicrilstorjen). 
ORCYNUS THYNNUS. 
I’ig. 28. 
The pectoral fins, when laid hack , do not extend farther than the end of the first dorsal fin. 
Fig. 28. Tunny ( Orcynus thynnus ) from Bohuslan. 1 / j 0 natural size. 
R. br. 7; D. 13 1. 14/ 1 /VIII— X; A. —/VIII 1. IX; 
13 1. 14' ’ 12 
P. 2 + 31 1. 32; V. ’/ 5 ; C. .r. + 1 8 + .r. 
Syn. Qivvog, Tlrfauig et KoqdtXog, Arist. ; 'Oo/.rrog et Hrfa- 
yvg, PElian. ; ’’Oov.vvog et IVLsXavdqvg, Athen.: vide Artedi, 
Syn . , p. 49 et Cuv., Val., Hist. Nat. Poiss., vol. VIII, 
pp. 77 — 79. 
Scomber Thynnus , Lin., Syst. Nat., ed. X, tom. I, p. 297 ; 
Eetz., Fn. Suec. Lin., p. 340; Hollberg, Boh. Fisk., Ill, 
p. 1 cum tab., Gbgs Vet., Vitt. Samh. N. Handl., V (1822); 
Nilss., Prodr. Ichlli. Sc., p. 83; Sundev., (’)fvers. Vet.- 
Akad. Fork. 1844, pp. 11 et 214; Gti-ir {Thynnus), Cat. 
Brit. Mbs., Fish., vol. II, p. 362; Wintii., Prodr. Ichth. 
Dan., Naturb. Tidskr. Ivbhvn., ser. Ill, vol. XII. p. 13; 
Id., Zool. Dan., Fiske, p. 23, tab. IV, fig. 4; McCoy, 
a Reyn. Anim., ed. 2, tome II, p. 198. 
b Cuv., Val., Hist. Nat. Poiss., vol. VIII, p. 120. 
c Proc. Acad. Nat. Sc. Philad., 14 (1862), pp. 125 and 329. 
d The difficulty of counting the rays in stuffed specimens renders the correctness of this formula uncertain. 
Scandinavian Fishes. 
13 
