Ki lis : 'I'm Plated Nematognaths. 105 



more than the snout in venezuelanus. The three specimens of 



at hand came from Trinidad, bul agree even more perfectly with the 



description of venezuelanus than with thai of ceneus. The specimens 



from which ceneus was described were 63.5 to [01.6 mm.; those from 



which venezuelanus was described were 35- 4.5 nun., which may account 



for the variation in proportion of height to length found by the two 



author.-. 



27. Corydoras virescens Ribeiro. (Plate XXYII, fig. 2.) 



Corydoras virescens Ribeiro, Comm. Linh. Telegr. Est. de Matto-Grosso ao Ama- 

 zonas. Ann. Xo. 5, Hist. Nat. Zool., 1912, 16 (Caceres). 



3545 C. M. 47 mm. Caceres, May 26, 1909. Coll. Haseman. 



3523 C. M. Thirty-eight, 23-48 mm. Caceres, May 26, 1909. Coll. 

 Haseman. 



3524 C. M. Nine, 23 to 45 mm. Jauru, June 2, 1909. Coll. Hase- 

 man. 



3525 CM. One, 24 mm. Rio Jauru, June 3, 1909. Coll. Haseman. 



3526 C. M. Four, 34 to 43 mm. (without caudal), San Francisco, 

 June 10, 1909. Coll. Haseman. 



3527 C. M. One, 45 mm. Rio Santa Rita, June 12, 1909. Coll. 

 Haseman. 



352S C. M. Twelve, 16 to 21 mm. (without caudal), Bastos, June 26, 

 1909. Coll. Haseman. 



3529 C. M. Two, 29 to 33 mm. Maciel, Rio Guapore, July 9, 1909. 

 Coll. Haseman. 



3530 C. M. One, 30 mm. Maciel, Rio Guapore, July 23, 1909. 

 Coll. Haseman. 



[This species was described as new by Mrs. Ellis. The name has 

 been suppressed, but her description is allowed to stand. — C. II. 

 Eigenmann.] 



Head to the end of the opercle 3 to 3.5; depth 2)2 to 3 (in very 



22 2X 



small); width 2 to 3.8; D. I, 8; A. I, 6; P. I, 7; lateral plates to ; 



19 20 



eye 1.5 to 2 in the snout, 3 to 3.3 in the head, 1.3 to 2 in the inter- 

 orbital. 



Moderately compressed throughout, becoming much stouter with 

 age; highest at the dorsal spine. Dorsal profile steep in front of the 

 nares. Ventral profile nearly straight, or only gently bowed. Caudal 

 peduncle rather sharply constricted. Coracoid processes not expanded 



