1916.] NATURAL SCIENCES OF PHILADELPHIA. 389 



COLD-BLOODED VERTEBRATES FROM COSTA RICA AND THE CANAL ZONE. 



BY HENRY W. FOWLER. 



During the summer of 1915 Mr. David E. Harrower gathered the 

 collections listed below, which were later purchased by the Academy. 

 Several of the fishes are new to science, and other records are for 

 rare or unusual forms. 



COSTA RICA. 



The collections made in Costa Rica were obtained at Guapilis, 

 the Chirripo River Valley and Port Limon, all in the Atlantic 

 drainage. 



Guapilis. 



A small collection of fresh-water fishes was obtained in the basin 

 of the Rio Guapilis. 



Astyanax aeneus costaricensis Mick. 



Head 3|; depth 2\ to 2f; D. m, 8 to in, 9; A. in, 25, i to in, 



27, i ; scales 34 to 36 in lateral line to caudal base and 3 more on 

 latter; snout 3| to 4 in head; eye 3 to 3|; maxillary 2\ to 2\; 

 interorbital 2| to 3; maxillary teeth 1-2 and 1-1, inner row 4-4. 

 Color when fresh in alcohol olive-brown on back. Broad lateral 

 brassy band, nearly wide as eye, changes behind into leaden-dusky 

 blotch at middle of caudal base, and continues out on median caudal 

 fin-rays to their edges. Hind edges of each caudal lobe narrowly 

 blackish, fin gray, and lower lobe tinged with red. Dorsal warm 

 brown. Adipose fin gray. Anal gray, darker along lower edge 

 and in front with median blood-red tinge or blotch, fading out behind. 

 Pectoral dilute reddish. Ventral bright vermilion. Iris yellowish. 

 Two examples 98 and 100 mm. in length. 



Alfaro cultratus (Regan). 



Color olivaceous above, when fresh in alcohol. Dusky median 

 streak on back. Iris olivaceous. Lower surface of body and head 

 paler than back. Dusky streak extends down each side of lower 

 jaw and on under side of head till opposite hind pupil edge. Dorsal 

 gamboge-olive. Caudal olive-gray. Other fins pale gamboge. Three 

 .examples, 52 to 58 mm. 



