452 CALIFORNIA ACADEMY OF SCIENCES. 



444. Callichthys callichthys. 



L'aUkhthijs tamoata Liuua?us, Mus. Ad. Fred. 1754, 73; Bleeker, 

 Silures de Suriname, 22, 1864 (Surinam). 



Silurus callichthys Liniifeiis, Sj'st. Nat. ed. x, 307, 1758 (America); 

 ed. xii, 506, 1766; Gmeliu, L. Syst. Nat. i, 1361. 



Cataphractiis calhjchthis Bloch, Ausl. Fische. viii, 86, pi. 377, tig. 1, 

 1794 (after a tigure by Prince Maurice, miich changed in copy- 

 ing); Bloch & Schneider, "Syst. Ichthyol. 107," 1801; Lacepede, 

 Hist. Nat. Poiss. v, 124, 1803 (the two Indies). 



Cataphractus callichthys Eigeum. & Eigenm. Proc. Cal. Acad. 2d 

 Ser. i, 164, 1888(Eio Janerio; Pernambuco; Juiz de Fora; Bahia; 

 Mendez; Macacos; Porto Seguro; Surinam). 



Callichthys asper Quoy & Gaim. Voy. Uran. Zool. 232, 1829; Cuv. & 

 Val. Hist. Nat. Poiss. xv, 302, 1840 (Cayenne; Kio Janerio); 

 Kner, SB. Ak. Wien, xvii, 1855, Ichthyol. Beitr. 107 (Par.-i Eio; 

 Surinam; Bahia); Castelnau, Anim. Nouv. Kares de I'Amer. du 

 Sud, .38, 1855 (Bahia), name only; Bleeker, Ichthyol. Arch. 

 In. Siluri, 53, 1858; Giinther, Cat. Fish. Brit. Mus. v, 226, 

 1864 (Bahia; Para); Cope, Proc. Am. Philos. Soc. xvii, 681, 1878 

 (Nauta). 



Cataphractus depressus Swainson, Fishes Kept. etc. ii, 304, 18.39, 

 based on Bloch, pi. 377. 



Callichthys ccelatus Cuv. & Val. Hist. Nat. Poiss. xv, 308, 1840 (Eio 

 Janeiro); Giinther, 1. c, 227, 1840 (copied). 



Callichthys laviceps Cuv. & Val. 1. c. xv, 309=: <? . 



Callichthys loricatus Gronow, "Cat. Fish. 157," 1854. 



Callichthys hneri Gill, Syn. Fish. Trinidad, W. I. Ann. Lye. Nat. 

 Hist. N. Y. vi, 394, 1858 (Trinidad); Giinther, 1. c. 227, 1864 

 (copied); Liitken, Vid. Medd. 1873, No. 18, 214-217 (Trinidad); 

 Jordan, Proc. U. S. Nat. Mus. 1886, 559 (name only). 



Callichthys affinis Giinther, 1. c. 226, 1864 (Eio Grande). 



Callichthys hemiphractus Hensel, Wiegm. Arch. 1868, i, 374 (Costa 

 da Serra)=the young. 



Habitat: La Plata to Trinidad. 



Callichthys cctilatus is said to differ from tliis species in 

 the number of dorsal rays, there being 6 instead of 7 or 

 8. The nuchal plates are also said to differ slightly. 



Callichthys loricatus we have placed here on the au. 

 thority of Dr. Giinther. 



As there are no characters mentioned in the de- 

 scription of C. kneri by which that species can be sepa- 

 rated from C. callichthys, we see no reason why it should 

 be kept distinct. 



