458 CALIFORNIA ACADKMY OK SCIENCES. 



the young, bluntish and sometimes claw-like or hooked 

 in the adult. A very long tapering anal papilla. 



Olivaceous, two series of light spots along middle of 

 sides; fins dusky, sometimes marbled. 



Head 3-3J; depth 3-3J; D. I, 8; A. I, 7; V. 6; Lat. pi. 



-> 4 -2 -) 

 ~TfS~ ' 



Over sixty specimens .09-. 23 m. Surinam; Gurupa; 

 Para; Santarem; Tabatinga; Arary; Silva, Lake Saraca; 

 Villa Bella; Porto do Moz; L. Hyanuary; Ueranduba. 



447. Hoplosternum thoracatum. 



Callichthys thoracatus Cuv. & Val. Hist. Nat. Poiss, xv, 309, pi. 443, 

 1840 (Mana; Martinique); Peters, MB. Ak. Berl.471, 1877 (San 

 Fernando de Apure); Kiier, SB. Ak. Wien, xvii, 1855, Ichthyol. 

 Beitr. 108 (Surinam); Giinther, Cat. Fish. Brit. Mus. v, 228 

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



Callichthys (Hoplosternum) thoracatus Steiiidachner, Fisch-fauna des 

 Cauca and Fliisse bei Guayaquil, 14, 1880 (Cauca). 



Hoplosternum thoracatum Gill. Syn. Fish. Trinidad, 36; Bleeker, Sil- 

 ures de Suriname, 26, 1864 (Surinam); Eigenm. & Eigenm. 

 Proc. Cal. Acad. 2d Ser. i, 164, 1888 (Curupira; Tabatinga; Cu- 

 dajas; Gurupa; Teffe; L. Hyanuary; Villa Bella; Para; Ueran- 

 duba; Porto do Moz; Pernainbuco; Obidos). 



Callichthys longifilis Cuv. & Val. Hist. Nat. Poiss. xv, 317, 1849 (Cay- 

 enne); Schornburgk, Fish. Guiana, part i, 150, drawings No. 

 22, pp. 151, 154, 1841 (Curassarraka); Giinther, Cat. Fish. Brit. 

 Mus. v, 228, 1804 (Surinam; Kiver Cupai). 



Hoplosternum longifilis Gill, Syn. Fish. Trinidad, 36 (Trinidad, W. I.); 

 Cope, Proc. Am. Philos. Soc. xvii, 1878, 681 (Nauta); Bleeker, 

 Silures de Suriname, 27, 1864 (Surinam). 



Callichthys personatus Eauzani, "Nov. Cornm. Acad. Scieiit. Insti. 

 Bonou. 1842, 322, pi. 24." 



? Callichthys exaratus Miiller & Troschel, Schomb. Brit. Guiana, iii, 

 630, 1848 (Guiana). 



Callichthys pictus Mull. & Trosch. 1. c. 



Callichthys sulcatus Kner, SB. Ak. Wieu, xvii, 1855, Ichthyol. Beitr. 

 110 (Rio Branco and Marabitanos). 



? Callichthys chiquitos Casteluau, Anim. Nouv. Eares de I'Amt'r. dn 

 Sud. 38, plate xviii, fig. 2, 1855 (Chiquitos). 



Habitat: Amazon and northward. 



Callichthys longifilis can scarcely be kept distinct from 

 thoracatus. The color is very variable, and otherwise we 



