178 FAMILIES OF SYXENTOGNATHOUS FISHES— GILL. vol. xvm. 



<7i'8oces, CuviER, Rfegne Animal, 1^ 6x1., II. p. 182, 1817; 2^ 6d., II, p. 281, 1829. 



<^Esoci(l(r, Fleming, Phil. Zool., p. 385, 1822. 



<^Esociens, Esocii, Latrkille, Fam. Nat. Rfegne An., p. 121, 182.5. 



<CExoceides, Ris.so, Hist. Nat. Europe M(<ri(l., Ill, 1826. 



<^Esocida\ Bonaparte, Giorn Accad. di Scienze, LII (Saggio Distrib. Metod. 



Auimali Yertebr. a Sangue Freddo), p. 94, 1832. 

 <^Esocida\ Bonaparte, Nuovi Aunali delle Sci. Nat., II, ]).133, 1838; IV, p. 273, 



1840. 

 <^Salmonidw, Swainson, Nat. Hist, and Class. Fishes, etc., II, pp. 184, 283, 1839. 

 <^Broche(s on Lucioides, Valenciennes, Hist. Nat. Poiss., XVIII, 1846. 

 <^BeloH\d(v, Bonaparte, Consp. Syst. Ich., fam. 68, 18.50. 

 :=BcJoiiida', Gill, Arraug Fam. Fishes, p. 14, 1872. 

 =Belouid(v, Cope, Proc. Am. Phil. Soc, XVII, p. 695, 1878. 

 —Belonid(r, Jordan and FoRDYCE, Proc. U. 8. Nat. Mas., IX, 1886, p. .339. 



Diagnosis. — Syiientognathi with the supramaxillaries united by su- 

 ture witli the interniaxillaries, the mandible \a ith au elongated iiitia- 

 dentaiy bone, the hypopbaryngeals united in a narrow body, tlie third 

 pair of epipharyngeals little enlarged, those of the fourth pair distinct 

 from the third and from each other, and the vertebra' with distinct 

 zygapophysoid i)rocesses. 



Subfamily ESOCIISr..^. 



<^Esoaidia, Rafinesqce, Analyse Nat., p. 89, 1815. 



<^Belo)ihn, Bonaparte, Nnovi Aunali delle Sci. Nat., II, p. 133, 1838; IV, p. 274, 



1840. 

 <^BeIo)iciiti, Blekkei!, Euum. Sp. Piscinm Archipel. Indico, p. xxx, 1859. 

 =zBelo)ihia , Gill, Cat. Fishes E. Coast N. America, p. 38, 1861. 

 ^^lldonim, Poey, Anal, de la Soc. Esp. de Hist. Nat., IV, p. 9, 1875. 

 z^AIaslaccmheliformrs, Bleeker, Atlas Ich. Indes Ncerlaud.. VI, p. 43, 1866-72. 

 ^^Belonhiw, Jordan and Gilbert, Syu. Fishes N.America, p. 372, 1882. 



Genus ESOX. 



Masiacemhelus. Klein, Hist. Pise. Nat., IV, p. 21, 1744. 



Esox, LiNN.EU.s, Syst. Nat., ed. 10, I, p: 313, 1758. 



Eaox, Rafine.sque, Car. ale. Gen. e Sp., p. 59, 1810. 



liaphistoma, Raeine.sque, Anal. Nat., p. 89, 1815. 



BeloHc, Ci'ViER, Regne Animal, II, p. 185, 1817. 



RamphixUrma (Rafinesque) Swainson, Nat, Hist. Fishes, etc., II, p. 296, 1839. 



Mucroi/iKdJiKs, (iRONOW, p. 147, 1854. 



jilaslacciiihthix, Bleeker, Nederl. Tijdskr. Dierk., Ill, \). 214, 1866. 



Genus TYLOSURUS. 



Tiilogin-ns, Co( TO. Giorn. Sc. Lett, e Arte Sicil., "XVII, p. 18, 1829". 

 TiilosKiKS, .loHDAN iind Gilbert, Syn. Fishes X. Am., p. 372, 1883. 



Genus ATHLENNES. 



Atlilennes, Jordan and Meek, Proc. U. S, Nat. Mns., IX, p. 343 (subgenus), 1886. 

 Athlennes, Jordan, Man. Vert. An. N. U. S., 5th ed., p. 92 (genus), 1888. 



Genus POTAMORRH APHIS. 



Polamorrh aphis, GCnther, Cat, Fish. Brit. Mus., VI, pp. 234, 256 (subgenus), 1866. 

 Liinmohclns, Agassiz, Journey to Brazil, p. 237, 1868. 



