118 ACANTHOPTERYGII. 



Genus II. — Lampeis, Betzius. 



Ghrysostosus, Lacepede. 



Brancliiiistegals seven. Body oval, elevated, and compressed. Month terminal, 

 protractile, and irilh a shallow cleft. Opercular pieces entire. Teeth absent from 

 the mouth. A aingle, maiiy-rai/ed, dorsal jIn destitute of spines : anal toith less rays 

 than the dorsal and^ also sjdii(dess. Veatrals elongated and many rayed. Scales small 

 and very deciduous. Air-hladder large and bifurcated posteriorly. JPyloric 

 appendages ii.umerous. 



Geographical distribution. — This beautifully tinted pelagic form is found in 

 the seas of Norway and extending in the Atlantic certainly so far as Madeira : 

 occasional examples are also captured in the JMediterranean. 



1. Lampris luna, Plate XLII. 



Sibbald, Scotia Illus. pi. vi, f. 3 ; Wallace, Orkneys, p. 37 ; Mortimer, Phil. 

 Trans, xlvi, p. 618, t. iv. Zeus cuuda bifurea, Stroem, Soendmer, i, p. 323, t 1, 

 f. 20; Miill. Prod. Zool. Dan. p. 44, No. 370. Opah, Penn. Brit. Zool. (Ed. 1) iii, 

 p. 223, pi. slii (Ed. 2), iii, p. 2911, pi. xIti. Zeus Stru'viii, Walb. Artedi, iii, 

 p. 308. Fni.'ison lune, Duhamel, Peches, iii, p. 74, t. yvii. Zeus regius, Bon. 

 Ency. Method, p. 72, f. civ. The Opah, Low, Fauna Oread, p. 208. 



Scomber pelagicns. Gunner, in Dronth. Selsk. Skr. iv, p. 80, t. xii, f. 1. 



Zeus luna, Gmel. Linn. p. 1225 ; Bl. Schn. p. 96 ; Donovan, Brit. Fish, v, 

 pi. 97; Sowerby, Brit, ilisc. pi. xxii ; Turton, p. 95. 



Zeus giittatus, Briinn. Nya. Saml. Danske Vid. Selsk. Skr. 1788, iii, p. 398, 

 t. A ; Holten, Nat. Selsk. Skr. v, p. 120 ; Faber, Fische Islands, p. 132 ; Richard- 

 son, Fauna Bor. Amer. Fishes, p. 83. 



Zeiis opah. Pennant, Arct. Zool. Suppl. p. 419 ; Shaw, Zool. iv, p. 287, 

 pi. xlii. 



Lampris guttatits, Retzius, Nov. Mt'm. Acad. sc. Suede, 1799, t. xx, pt. 3, p. 91; 

 Holten, Zool. Dan. iv, t. 144; Cuv. and \'al. x, p. 39, pi. cclxxxii (Yening) ; Cuv. 

 Regne Anim. 111. Poissons, pi. Ixi ; Yarrell, Brit. Fish. (Ed. 1) i, p. 173, c. fig. 

 (Ed. 2) i, p. 194 (Ed. 3) ii, p. 263 ; Parnell, Fish. Firth of Forth, p. 63, pi. 27, and 

 Wem. Mem. vii. p. 223, t. xxvii ; White, Catal. Brit. Fish. p. 38 ; Swainson, ii, 

 p. 251 ; Gaim. Voy. Groenl. Zool. Poissons, pi. x ; Schlegel, De Dieren v. Neder. 

 p. 12, pi. i, f. 6 ; Collett, Norgcs Fi.ske, p. 48 ; Winther, Ich. Dan. 1879, p. 15. 



Scuniber gu.nn-eri, Bl. Schn. p. 38. 



Ghrysotosus luna, Lacep. iv, p. 586, pi. ix, f. 3. 



Zetis imperialis, Shaw, Nat. Misc. iv, pi. exl and Zool. iv, p. 289, pi. xlii. 



Lampris luna, Risso, Eur. Mt'rid. iii, p. 341 ; Flem. Bi-it. An. p. 219 ; 

 Templeton, Mag. Nat. Hist. (2) 1837, i, p. 409; Jenyns, Manual, p. 369; 

 Thompson, Nat. Hist. Ireland, iv, p. 96; Giinther, Catal. ii, p. 416; Steind. Ich. 

 Span. u. Port. 1868, p. 31 ; Mcintosh, Fish. St. Andrew's, p. 174 ; Giglioli, Catal. 

 Pesc. Ital. p. 27 ; Moreau, Poiss. France, ii, p. 484. 



Lampris lunta, Lowe, Tians. Zool. Soc. ii, p. 183, iii, p. 6, and Proo. Zool. Soc. 

 1839, p. 80, and Fish. Madeira, p. 27, t. v ; Gray, Ann. and Mag. (3) 1861, p. 192 ; 

 Lowe, Fauna of Norfolk, p. 11. 



Opah, Couch, Fish. Brit. Isles, ii, p. 133, pi. xciii. 



B. vi-vii, D. 53-55, P. 24, V. 14-16, A. 38-41, C. 22, Vert. 20-24/21-22. 



Length of head 3j to 4, of ciiudal fin 4| to 5, height of body 2j to 2§ in the 

 total length. Eye — placed slightly above the middle of the height of the head, 

 diameter 4 to 51 in the length of the head, If diameters from the end of the 

 snout. Head a little higher than long, with the profile over the eye slightly 

 concave. Jaws nearly equal anteriorly : the po.sterior extremity of the maxilla 

 does not extend so far as to beneath the eye. Teelh — Jaws and palate toothless. 

 Fini-— the dorsal commences over or slightly behind the base of the pectoral ; in 



