1903.] NATURAL SCIENCES OF PHILADELPHIA. 517 



The caudal small, deeply divided, its lobes equal to the length of 

 the head. 



Pectorals reaching -f distance to ventrals. Ventrals reaching f dis- 

 tance to origin of anal. 



Height of anterior rays of anal equal to length of ventrals, the last 

 half of the anal but half as high. 



Color in alcohol, straw. A faint silvery band extending from base 

 of caudal to below the dorsal fin. The lower lip black. The fins im- 

 maculate. A note of the collector with No. 237 states that the caudal 

 fin is red. 



Some of the examples preserved in formalin show the dorsal and pec- 

 torals edged with black in front. In a number of specimens the middle 

 caudal rays are dusky. 



Min. Max. Average. 



Lengthinmm 33.0 79.0 55.7 



Anal 18.0 22.0 



Depth 3.4 4.0 



Head 3.8 4.0 



Eye 3.5 4.0 



Perforated scales 7 14 



[Intermaxillary 14 20 



Teeth] Maxillary 9 13 



[ Mandibular 36 42 



Scales 5.5 to 7-36 to 39-4.5 to 6, 



61. Aphyocarax alburnusl 



A single specimen agreeing in many respects with alburnus, of which 

 we have not the original description. Length 31 mm. A. 19. Scales 

 5+-36-4^; depth 3; head 3|; eye 2| in the head, 8 scales perforated; 

 14 intermaxillary, 2 maxillary and 18 mandibular teeth. Mouth very 

 minute, snout little more than half the eye. 



The specimen is deeper than in descriptions of alburnus. 



62. Aphyocharax anisitsi sp. nov. 



Type No. 10,028, 41 mm. (part of 8). Asuncion. , 



Co-types No. 10,027, one specimen (No. 6). Asuncion. 



No. 10,029, three specimens (No. 7). Asuncion. 



No. 10,024, nine specimens (160). Campo Grande. 



No. 10,026, six specimens (264). Campo Grande. 



No. 10,031, one specimen (94). Arroyo Trementina. 



No. 10,025, one specimen (226). Arro5^o Chagalahna. 



This species is very closely related to alhurnus from the Peruvian 

 Amazons. It differs from that species chiefly in the number of scales 

 in the lateral line. 



Description of the type: 



