290 THE AMERICAN CHARACIDAE. 



Specimens examined. 



Catalogue Number of Size 



number specimens in mm. Locality 



6257 Field Mus. Type 1 130+ Las Canas, Costa Rica 



6023 Field Mus. 1 103 Pacific Slope of Panama 



I am indebted to the late Mr. Seth E. Meek for the privilege of examining 

 these specimens. 



Head 4.66; depth about 3.33; D. 11; A. 27; scales 8-39-6; eye 3.5; inter- 

 orbital 2.5. 



Elongate, heavy forward. The head short and blunt. Pre ventral area 

 broadly rounded, without a median series of scales, postventral area broadly 

 rounded. Predorsal area rounded, with a partially complete series of ten 

 median scales. 



Occipital process ^ the distance from the base of the occipital process to the 

 dorsal, bordered by 3 scales on the side. Interorbital very convex. Frontal- 

 fontanel one third as long as the parietal. Snout short and blunt. Maxillary 

 not quite equal to length of eye. Second suborbital leaving a naked space 

 equal to ^ its own width. Premaxillary with foiu* teeth in each series. Maxil- 

 lary with two teeth. Dejitary with four large graduated teeth in front and 

 several smaller ones similar to the last of the four larger on the sides. 



Gill-rakers short, about 6-1-11. 



Dorsal a Uttle nearer snout than caudal, its height about ^ in the length. 

 Caudal about equal to length of head. Origin of anal below the tip of the last 

 dorsal ray. Ventrals below the second scale in front of the dorsal, reaching a 

 little more than halfway to anal. Pectorals reaching f to ventrals. 



Scales thin, cycloid, rather irregularly placed on the belly; no interpolated 

 scales on the sides. An exceedingly low anal sheath. Caudal naked; a very 

 short and broad axillary scale. Lateral line but little decurved. 



Silvery, an obscure vertical humeral spot, a plumbeous lateral band; a 

 caudal spot, middle caudal rays dark. 



45. AsTYANAX ALBEOLUS Eigenmauu. 

 Plate 49, fig. 1. 



Astyanax oerstedii Meek {non Kroyer), Field mus. Publications, 1907, 7, p. 145, in part (Turrialba; 



Rio Siguires; Rio Machucha). 

 Astyanax albeolus Eigenmann, Bull. M. C. Z., 1908, 62, p. 97; Rept. Princeton univ. exped. Patagonia, 

 1910, 3, p. 432. 



Habitat. — Costa Rica. 



