PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 423 



and laterally expauded but sLort, the ethmoid prominent above, en- 

 larged and narrowed forwards, the vertebnr in normal number (about 

 8+9), the head compressed and with a projecting attenuated snout, and 

 the dorsal and anal fins short and pauciradiate. 



CHONEEHIKID^. 



SYNONYMY. 



=Xenopterina:', Gill, Johnson's Univ. Cyclopseclia, v. 4, p. 792, 1878. 



Tetrodontoidea with the frontals separated from the supraoccipital 

 by the intervention of the postfrontals, which are much enlarged and 

 assume a quadrangular form, the ethmoid little prominent to view and 

 very short, the vertebnij in increased number (12+17), the head wide 

 and with a blunt wide snout, and the dorsal and anal fins long and 

 multiradiate (D 32—38; A 28—32). 



DIODONTOIDEA. 



Gymnodontes without a pelvis, witli a normally developed caudal 

 region, with the intermaxillary and dentary bones coossifled into single 

 sutureless arches, the supramaxillary portions extended laterally be- 

 hind, the ethmoid retracted backwards under the frontals, and the 

 postfrontals retracted inwards to the sides of the supraoccipital and 

 behind the frontals. 



DIODONTID^. 



SYNONYMS AS FAMILY NAMES. 



<Odontini, Bafincsque, Indice d'lttiolog. Siciliana, p. 40, 1810. 



< Gymnodontes, Risso, Hist. Nat. do I'Enrope M6rid., t. 3, p. 102, 1826. 



< Gymnodontes, Cuviei; Eegne Animal, Ire 6d., t. 2, p. 145, 1817 ; 2e 6d., t.2, p. 364, 1829. 

 <GynmodontidtB, Adams, Manual Nat. Hist., p. 95, 1854. 



<Diodoniens, Bibron, Revue et Mag. de Zool., v. — , p. — , 1855. 



< Gymnodontes, Gilniher, Cat. Fishes Brit. Mus., v. 8, p. 269, 1870. 



= Diodontid:p, Cope, Trans. Am. Phil. Soc., v. 14, p. 458, 1870; Proc. Am. Assoc. Adv. 



Sci.,v. 20, p. 340, 1872. 

 = Diodontes, Fitzinrjer, Sitzungsher. K. Alcad. der Wissensch. (VVien), B. (!7, 1. Abth., 



p. 48, 1873, 

 = DiodontidtB, Gill, Cat. Fishes, E. Coast N. Am., p. 6, 1873. 



SYNONYMS AS SUBFAMILY NAMES. 



<Odopsia, Rafinesqne, Analyse dc la Nature, 2 snhf. of 22 fam., p. — , 1815. 



= Diodontini, Bonaparic, Nuovi Annali dclle Sci. Nat., t. 2, p. 131, 1838 ; t. 4, p. 186, 1840. 



= Diodoutini, Nardo, Atti Congressi Seienz. Ital. rac. ct ord., v. 1, ]). 71 (1842), 1844. 



< Diodoniuie, Swaitisoti, Nat. Hist, and Class. Fishes, etc., v. 2, pp. 194, 3:39, 18;;9. 

 ^Diodoniens, Holhird, Annales Sc. Nat., Zool. (4), v. 8, p. 313,1857; (4,) v. 13, p. 46, 



1860. 

 = Diodontiformes, Bleclrr, Ennm. Sp. Piscium Archipel. ludico, i>. xiv, 1859; Atlas 



I'ch. des Hides Neerlaud., t. 5, p. 49, 1865 ; Nederl. Tijdschr. Dierk., v. 3, p. 17, 



1866. 

 <Tctrodontina, Glintho; Cat. Fishes Brit. Mus., v. 8, pp. 208, 255, 1870. 

 = Diodoiitinie, Jordau <S- Gilbcrl, Syn. Fishes N Am., p. 859, 1883. 



The only lamily of the superfamily. 



