458 CALIFORNIA ACADEMY OF SCIENCP^R. 



the young, bluntish and sometimes claw-like or hooked 

 in the advilt. A very long tapering anal papilla. 



Olivaceous, two series of light spots along middle of 

 sides; fins dusky, sometimes marbled. 



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



2 4-2 5 



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. 44.3, 

 1840 (Maua; Martinique); Peters, MB. Ak. Berl.471, 1877 (Sau 

 Fernando de Apnre); Kner, 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 Stemdachner, Fisch-fauna des 

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



Hoplosternum thoracatum GiW. Syn. Fish. Trinidad, 36; Bleaker, Sil- 

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

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

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

 duba; Porto do Moz; Pernambuco; Obidos). 



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

 enne); Schomburgk, Fish. Guiana, j^art i, 150, drawings No. 

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

 Mus. V, 228, 1864 (Surinam; Kiver Cupai). 



Hoplostermim loncjifiUs Gill, Syn. Fish. Trinidad, 36 (Trinidad, W. I.); 

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

 Sihires de Suriname, 27, 1864 (Surinam). 



Callichthys personatus Kanzani, "Nov. Comm. Acad. Scient. lusti. 

 Bonon. 1842, 322, pi. 24." 



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

 630, 1848 (Guiana). 



Callichthys 2}ictus Miill. & Trosch. 1. c. 



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

 110 (Rio Branco and Marabitanos). 



? Callichthys chiquitos Castelnau, Anim. Nouv. Eares de I'Amer. du 

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



Habitat: Amazon and northward. 



CallicJdhi/s longifilis can scarcely be kept distinct from 

 thoracatus. The color is very variable, and otherwise we 



