390 Annals of the Carnegie Museum. 



1578 C. M. One, below Packeoo Fall, 1908. Coll. Wm. Grant. 



1579 and 1580 C. M., 11990 I. U. M. Gluck Island, British Guiana, 

 1908. Coll. Eigenmann. 



1581 C. M., 11991 I. U. M. Kumaka, Demerara, British Guiana, 

 1908. Coll. Eigenmann. 



1582 C. M., 1 1992 I. U. M. Mud Creek in Aruka River, British 

 Guiana, 1908. Coll. S. E. Shideler. 



1583 C. M. Two, probably Chipoo Creek, 1908. Coll. Win. Grant. 



1584 C. M. One, Botanic Garden, Georgetown, British Guiana, 

 1908. Coll. S. E. Shideler. 



7. Hoplosternum melampterum (Cope). 

 Callichthys melampterus Cope, Proc. Acad. Nat. Sci. Phila., 1S71, 275, PI. XIV, 



fig. 4 (Ambyiacu River). 

 Hoplosternum melampterum Eigenmann and Eigenmann, Occasional Papers, Cal. 



Acad. Sci., I, 1890, 455, in key only. 

 Callichthys pecloralis Boulenger, Proc. Zool. Soc. London, 1895, 525. 



10151 I. U. M. Two, 54 and 77 mm. Corumba. Coll. Anisits. 

 10199 I. U. M. Two, 27 and 34 mm. (without caudal), Rio Paraguay. 



Coll. Anisits. 

 9855 I. U. M. One, 72 mm. (without caudal), Rio Branco, Matto 



Grosso, 1895. Coll. Anisits. 



8 Hoplosternum schreineri Ribeiro. 

 Hoplosternum schreineri Ribeiro, Fauna Brasiliense, Peixes, IV, 1912, 150 (Para). 



Genus Decapogon Eigenmann and Eigenmann. 



a. Caudal uniform. 



b. Barbels extending beyond tips of pectorals. . . adspersum (Steindachner) 9. 



bb. Barbels not reaching margin of opercle verissimi Ribeiro. 10. 



aa. Caudals with five parallel bands urostriatum Ribeiro. 11. 



9. Decapogon adspersum (Steindachner). 

 (Plate XXXI, figs. 2, 2a, 2b.) 



Callichthys adspersus Steindachner, " Ichthyologische Beitrage," V, 1876, 87, PL 



XI, figs. 2~2b' (Santarem to Tabatinga). | 

 Decapogon adspersum Eigenmann and Eigenmann, Occasional Papers, Cal. Acad. 



Sci., I, 1890, 461. 



3454 C. M. One, 122 mm., Santarem, Dec. 7, 1909. Coll. Haseman. 

 4225 I. U. M. One, 85 mm. (to base of caudal only), Brazil. 



