E] lis : The Pla i i . i • \i ma roGNAi 



Collichthyidce Gill, Arrangement of Family of Fishes, [872, 1 nmann and 



Eigenmann, South American Nematognathi, Occasional Papers, Cal. Acad. Sci., 

 I, [890, \\<)\ A Catalogue of the lM-.--hw.iiiT Fishes of South America, Proc. 

 I . s. Nat. Mus., XIV, 1891,43 and 44. Eigenmann, Rept. Princeton Univ. 

 Exp. Patagonia, III, 1910, 401-403. 



The Callichthyidae range from the Magdalena and Orinoco to the 

 Rio de la Plata. The family is composed of ten genera containing 

 forty-seven species, twenty-eight of which are placed in the genus 

 Corydoras. Giinther placed Callickthys, the single genus recognized 

 by him, in 1 he group Hypostomatina of his Silurida proterapodes. 

 He gave brief descriptions of eleven species, which he suggests might 

 well be arranged in three subgenera, Callickthys, Scleromystax, and 

 Corydoras. Eigenmann and Eigenmann (1. c, 1890) recognize seven 

 genera and twenty-five species. Their revision is the most complete 

 account of the family published. It contains the complete synonymy 

 up to 1S90, with partial or complete descriptions of all species, as well 

 as keys to the genera and species. The catalog published by the 

 Eigenmanns in 1891 lists the same seven genera and twenty-five 

 species. The list published in 1910 by Eigenmann includes the ten 

 genera recognized in this paper and thirty-four of the species. The 

 species added since 1910 are Corydoras multimaculatus, C. ehrhardti of 

 Steindachner; Corydoras kronei Mirando Ribeiro; Corydoras garbei, 

 C. microps venezuelanus, C. meridionalis, C. nattereri, C. triseriatus, and 

 coins of von Ihering; C. micr acanthus, microcephalus, polystictus, 

 melanistius, undulatus, melanotccnia, and macrosteus of Regan; IIop- 

 losternum schreineri, Decapogon verissimi and urostr latum, and 

 Corydoras virescens of Ribeiro. The following are described as new 

 in this paper: Cascadura maculocephala, Chcenothorax eigenmanni 

 and Hoplo sternum magdalence Eig. (cf. Appendix). Corydoras eigen- 

 manni von Ihering is considered synonymous with Corydoras kronei 

 Mirando Ribeiro; Corydoras meridionalis von Ihering with Corydoras 

 ehrhardti Steindachner; and Corydoras microps venezuelanus von 

 Ihering with Corydoras ceneus (Gill). Several of those described by- 

 Regan are probably also synonyms. 



Genus Scleromystax Giinther. 



1. Scleromystax barbatus (Quoy and I . aim ard). 



(Plate KXV, figs. 1-2.) 

 Callickthys barbalus Quoy an 1 Gaimard, Voy. Uranie et Phys., Zool., 1824, 234. 

 — Cuvier and Valenciennes, Hist. Nat. Poiss , XV, 1840, 322 (Rio Janeiro). 



