12 On some new or Uule-known Fishes from Brazil. 



Brachychalcinus retrospina^ sp. n. (PI. II. fig. 2.) 



Length of head 4 to 4| times in total length (without 

 caudal), depth of body \^ to 1^. Maxillary toothless, nearly 

 vertical, not extending beyond the anterior border of the eye ; 

 diameter of eye half length of head, once and two thirds 

 length of snout, equal to interorbital space ; dorsal profile 

 ascending abruptly from above centre of eye ; a very short 

 adipose eyelid in front. Dorsal 111, just behind vertical of 

 base of ventrals. Adipose fin well developed. Anal II 

 31-34. Pectorals slightly shorter than head, not quite 

 reaching ventrals. Latter small, I 6. Scales 33-35 ^^ ; 

 lateral line complete. A silvery lateral stripe j fins speckled 

 with black, adipose black-edged. 



Total length 80 millim. 



Three specimens, from Santa Cruz. 



I seize this opportunity to point out that Pseudocoi'ynopoma 

 Dorice^ Perugia, Ann. Mus. Genova, (2) x. 1891, p. 646, fig., 

 and Bergia altipinnis, Steindachner, Anz. Ak. Wien, 1891, 

 p. 173, and SB. Ak. Wien, C. i. 1891, p. 366, pi. ii. fig. 2, 

 are identical. Perugia's description (April) has priority over 

 Steindachner's (July). 



The other species represented in Messrs. Moore aud Evans's 

 collection are the following : — 



Acara viridis, Heck. Corumba. 

 PimeloduSj sp. (young). Chapala Plateau. 

 Macrodon trahira^ Bl. Schn. Corumba. 

 Erythrinus unitceniatus^ Spix. Corumba. 

 Pyrrhulina semifasciata^ Stdr. Corumba. 

 Leporinus megalepis, Gthr. Santa Cruz. 

 Tetragonopterus orbicularis, C. & V. Santa Cruz. 



lacustris, Rhdt. Corumba. 



rivularis, Ltk. Chapala Plateau. 



Chalcinus paranensis, Gthr. Corumba. 

 Xiphorhampkus ferox, (ithr. Santa Cruz. 



EXPLANATION OF THE PLATES. 

 Plate I. 



Loricaria Evansii, | nat. size. 



Plate II. 



Fig. 1. Tetrayonopterus Mooni. 

 Fig. 2. Brachychalcinus retrospina. 



