34 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



VOL. xxxm. 



with a shorter, blunter head, and to C. limsesquamis^ from which it 

 differs in little but the length of the anal. 



D. 11; A. 47-50; head 3|-3f ; depth a little more or less than 3. 

 Scales 25-110 to 112-25; eye 4i to (> in the head; snout 3i-3f ; inter- 

 orbital 4. 



Profile very strongly concave, the occiput greatly arched; distance 

 from tip of snout and tip of maxillary equal to distance from tip of 

 snout through upper margin of eye to edge of preopercle; suborbitals 

 extending back to vertical limb of preopercle, leaving only a small 

 area behind the end of the maxillary exposed; teeth as in other mem- 

 bers of the genus. 



Fig. 8.— Charax atratoensis. 



Pectorals extending past middle of ventrals to anal in smaller speci- 

 men, not quite so far in the larger. Entire surface of the scales very 

 rough. 



A silvery lateral band, a faint humeral spot in the smaller specimen, 

 a large caudal spot, not continued to the end of the rays. Highly 

 iridescent. 

 Salminus maxillosus Cuvier and Valenciennes. 



Nos. 1630 and 1631. Three specimens, Paraguay, Page collection. 

 Acestrorhynchus falcatus (Blocli). 



The species A. falcatus Avas based on a specimen from Surinam with 

 aii:d rays 20; MiiUer and Troschel gave the lateral line as 80 and the 

 an^il as 30. Cuvier and Valenciennes had 3 (4) specimens, one from 

 Surinam and two from Mana. One (not stated which) had lateral line 

 80, the others at least 100 "cent vingt" at one place, and ''a cent" in 

 another, I have a specimen from Surinam (Cat. No. 24670 U.S.N.M.) 

 Bloch's type locality with lateral line 82-85 and A. 27, which is very 

 prol)ably the f (/leaf us of Bloch. This specimen differs notably from 

 other specimens in the Indiana University and National Museum 

 collections, and from the falcatus of recent authors, and should be 

 kept di.>tinct from them. It is very probable that the smaller scaled 



