Fishes of the Order Cyprinodontes 21 



mediate l)etween those of F. a. anncctens on the one side and those of P. a. 

 Jiespcris on the other. 



1. Chitaria; elevation, 340 meters. One female, 48 mm. long to caudal 

 base: depth, 3.3; head, 3.8; snout, 3.4; eye, 3.4; scales, 28; dorsal rays, 9; 

 anal, 9, the fin not strongly falcate. This specimen has the large eye and the 

 coloration of annecfcns, but only 9 dorsal rays, as in hesperis, and the head 

 of intermediate length. 



2. El Guayaho; elevation, 360 meters. Five females, 44 to 56 mm. long 

 to caudal: depth, 3.0 to 3.4; head, 3.6 to 3.9; snout, 3.3 to 3.4; eye, 3.0 to 3.5; 

 scales, 29 or 30; dorsal rays, 10 (four specimens) or 11 (one). These speci- 

 mens have the large head, large eye, and the number of dorsal rays of typical 

 aiiiiectens, but the dark margins of the scale pockets are not concentrated into 

 spots. 



Another series from Guayabo, collected by J. F. Ferry, contains: (i) 

 young females with the typical coloration of annectens; (2) four males, 24 

 to 30 mm. long to caudal; (3) four females, resembling the lot described 

 above, 42 to 50 mm. long. The adult females present these variations : head, 

 3.6 to 3.9; eye, 2.9 to 3.2; scales, 29 or 30; dorsal rays, 9 (three specimens), 

 as in hesperis. 



3. Turrialba; elevation, 600 meters. One female, 40 mm. to caudal: 

 depth, 3.4; head, 3.65 ; snout, 3.0; eye, 3.2 ; scales, 29; dorsal rays, 9; anal, 9, 

 strongly falcate. This specimen agrees w^ith typical anncctens in proportions 

 and coloration, but with hesperis in the number of dorsal rays. 



4. Tiicnrrique; elevation, 941 meters. Four females, 40 to 49 mm. long; 

 head, 3.6 to 4.0; eye, 3.0 to 3.4; scales, 29 to 31; dorsal rays, 9 (all four 

 specimens) ; anal strongly falcate; dark margins of scale pockets concentrated 

 ventrally into spots, which are not divided along axis of fish. The fishes of 

 this lot have the proportions of annectens, but only 9 dorsal rays, as in 

 hesperis. 



5. Quehrada dc los Ncgros; elevation, ( ?). Twenty-six females, varying 

 in length to caudal base from 34 to 52 mm. The specimens of this lot more 

 than 45 mm. long have the following cliaracteri sties : head, 3.8 to 4.2 ; eye, 

 3.2 to 3.6; scales, 29 to 31 ; dorsal rays, 9 (ten specimens) or 10 (16 speci- 

 mens) ; anal more or less strongly falcate; coloration as in the Tucurrique lot. 

 The specimens of this series have the large eye characteristic of typical annec- 

 tens, but in the size of the head and in the number of dorsal rays they are 

 intermediate between typical annectens and the subspecies hesperis. 



6. " Qiiehradilla" (this locality cannot be found on the available maps, 

 but according to a note left by Dr. Meek with the specimens, Ouebradilla is 

 on the Atlantic slope of Costa Rica). A large series collected by Dr. A. 

 Alfaro, including about fifty males 21 to 29 mm. long. Eight females, 51 to 

 59 mm. long to base of caudal, have the following proportions : head, 3.8 to 

 4.5 ; snout, 2.7 to 3.3 ; eye, 3.4 to 2i-TS '■> scales, 29 or 30; dorsal rays, 8 to 10 

 (eight in one specimen, nine in 35, ten in 8) ; anal strongly falcate. This 

 series has the general appearance of hesperis, but the eye is not quite so 

 small as in that subspecies. 



