169 
Mr. G. A. Boulenger on two new Fishes . 
Guiraca cyanoides , the two nearest allied forms, although it 
possesses characters of both, being an intermediate phase 
which might readily be taken for a hybrid. 
I append dimensions of four species. 
It affords me much pleasure in naming this new species 
after the Honourable Walter Rothschild. 
Guiraca argentina , Sharpe. 
(Bill robust, culmen slightly curved.) 
No. Length. Wing. Tail. Tarsus. Culmen. 
1. Cosquin, Cordova, 
Argentine Rep. (E. W. 
White) 67 3*6 3*6 0*85 0*7 
2. J , Catamarca, Arg. 
Rep. (E. W, White) . . 6*6 3*4 3*3 0*85 0*7 
Guiraca cyanea (Linn.). 
(Culmen much curved.) 
1. 
d , Brazil 
5*95 
2-9 
2-7 
0-8 
2. 
. 5*85 
2*9 
2*8 
0-8 
3. 
5-4 
2-9 
2*65 
0-8 
4. 
d , Central America . , 
. 5-5 
2*9 
2*85 
0*85 
5. 
5 , Brazil 
. 5*5 
26 
2-6 
0*8 
0*6 
0*6 
0*55 
0*55 
0-6 
Guiraca Rothschildii , sp. n. 
(Culmen straight.) 
1 . 
d , River Carimang . 
. 6-0 305 2-85 
0*8 
0-75 
2. 
?, » 
. 6-75 2-95 2-55 
0*8 
0-7 
Guiraca cyanoides. 
(Culmen slightly curved.) 
1 . 
d , Panama 
. 6*2 3*2 2-85 
0*8 
0-7 
2. 
2 , Antioquia 
. 6*3 3-0 2-7 
0-8 
0*7 
XIX. — Descriptions of two new Cyprinodontoid Fishes . 
By G. A. Boulenger. 
Cyprinodon Danfordii. 
D. 12-13. A. 11-12. V. 5. L. lat. 27-28. L. tr. 11. 
Height of body 2§ to 3 times in males, 3^ times in females, 
in the total length (without caudal) ; length of head 3J to 3^ 
times in males, 3f in females. Diameter of eye equal to length 
of snout and contained 3^ to 3| times in length of head ; 
interorbital space half length of head ; snout short and obtuse. 
Dorsal not extending when depressed to the caudal ; its origin 
