ANNOTATED LIST OF THE SPECIES 181 
Chaenothorax semiscutatus Kigenmann, 1910, Rept. Princeton Univ. Exped. Patagonia, III, 402; 
Ellis, 1913, Ann. Carnegie Mus., VIII, 393. 
Brochis coeruleus Gosline, 1940, Stanford Ichth. Bull., II, 1, 24. 
Known only from the Ambyiacu 
Genus 72: OSTEOGASTER Cope 
Corydoras (in part) Kigenmann and Kigenmann, 1890, Oec. Papers Cal. Acad. Sci., I, 468; 
Regan, 1912, Ann. Mag. Nat. Hist., (8), X, 209. 
Osteogaster Cope, 1894, Proc. Amer. Phil. Soec., X XXIII, 102; 
Higenmann, 1910, Rept. Princeton Univ. Exped. Patagonia, III, 403. 
Brochis (in part) Regan, 1912, Ann. Mag. Nat. Hist., (8), X, 209; 
Gosline, 1940, Stanford Ichth. Bull., Il, 1, 24. 
Type: Corydoras eques Steindachner 
Throughout the Amazon 
Separable from the nearby Corydoras on the basis of the meeting of the coracoid 
processes in the middle line of the belly, a doubtful point, however, which has been 
solved in the Gosline monograph by making it a synonym of Brochis. 
163. OSTEOGASTER SPLENDENS (Castelnau) 
Callichthys splendens Castelnau, 1855, Anim. Amér. Sud, Poiss., 39, pl. xviii, fig. 3, Rio Tocantins, 
Corydoras splendens Cope, 1871, Proc. Acad. Nat. Sci., Phila., XXIII, 283, Rio Ambyiacu; 
Eigenmann and Eigenmann, 1890, Occ. Papers Cal. Acad. Sci., I, 468. 
Osteogaster splendens Kigenmann, 1910, Rept. Princeton Univ. Exped. Patagonia, III, 403; 
Ellis, 1913, Ann. Carnegie Mus., VIII, 412. 
Brochis coeruleus Gosline, 1940, Stanford Ichth. Bull., IT, 1, 24. 
Rio Tocantins and Rio Ambyiacu 
Family X: Loricarndae 
Siluroides (in part) Cuvier, 1817, Régne Anim., ed. i, I, 199. 
Goniodontes Agassiz, 1829, Sel. Gen. et Spec. Pisce. Bras., 1. 
Loricata Kner, 1853, Denksch. KK. Akad. Wiss. Wien, VI, 75. 
Loricaroidei Bleeker, 1863, Nederl. Tijdsch. Dierk., I, 77. 
Hypostomatina (in part) Giinther, 1864, Cat. Fish. Brit. Mus., V, 11. 
Loricartidae Gill, 1872, Arr. Fam. Fish., 19; 
Eigenmann and Eigenmann, 1888, Amer. Nat., XXII, 649; 
Kigenmann and Eigenmann, 1890, Oce. Papers Cal. Aead. Sei., I, 351; 
Regan, 1904, Trans. Zool. Soc. London, XVII, 191; 
Jigenmann, 1912, Mem. Carnegie Mus., V, 221. 
Most of South America 
A family of Nematognath fishes extending throughout the lowlands and 
moderate elevations. Invested on sides and back, sometimes on the venter, with 
an armor of bony plates; the plates sometimes with few or many denticles. Mouth 
inferior, bordered with a broad lip; maxillaries thin, terminating in a barbel, and 
