FAMILY XI. PcECiLiiDyE. 103 



behind that of the anal ; ventrals well developed ; air bladder present ; 

 intestinal canal short, i to i> times the length of the body; anal fin 

 of male not modified, it being similar in size and position to that 

 in the female; oviparous. 



KEY TO THE SPECIES OF FUNDULUS. 



a. Scales large, 31 to 38 in the lateral series. PAGE 



b. Body without cross-bars; anal rays 13 to 16. 

 c. Body rather slender; depth 4 to 4^; dorsal 

 rays 12 or 13; scales 34 or 35. 



d. Anal rays 14 to 16; depth 4 [guatemalensis] 103 



dd. Anal rays 13 ; depth 4^ [punctatus] 104 



cc. Body rather robust, head 3^; depth 3%"; 

 dorsal rays 14; anal rays 15; scales 11-30; 

 origin of dorsal midway between tip of cau- 

 dal and orbit oaxacaz 104 



bb. Body with cross-bars; anal rays' 9 to n. ; 

 scales large, 30 to 33 in the lateral series, 

 f. Body with about 23 narrow undulating 

 silvery bars, narrower than the inter- 

 spaces; fins nearly plain; scales 10-31 vinctus 105 



ff. Body with 7 to 15 narrow, dark, vertical 

 bars X to ^3 as wide as interspaces, and 



not very dark; scales 11-33 similis 105 



aa. Scales small, 35 to 48 in the lateral series, 

 g. Dorsal rays 10 to n ; anal rays 9 to n ; depth 



3* to 4 #. 

 h. Scales 35 to 38 in the lateral series ; depth 



3t to 3f heteroclitus 106 



hh. Scales 41 to 46 ; depth 4 to 4^3 grandis 107 



gg. Dorsal rays 1 3 to 15; anal rays 1 3 to 17; depth 



4X to s 2 A- ^ 

 i. Scales in lateral series 37 to 39; dorsal rays 



13 or 14; anal rays 16 or 17 [labialis] 107 



ii. Scales in lateral series 47 to 60. 



j. Scales in the lateral series 47; depth 5^ extensus 108 



j j . Scales in the lateral series 6 o ; depth 4 % to 4 %" zebrinus 1 08 



Sub'genus Fundulus Lac6pede. 



Fundulus guatemalensis Gunther. 



Fundulus guatemalensis Gunther, Cat., vi, 321, 1866; Lago de Duenas; Lago 

 de Amatitlan; Rio Gujalote (all in Guatemala): Gunther, Fishes Cent. 

 Amer., 483, pi. 86, figs. 3 and 4, 1869; Lago de Duefias; Lago de Ama- 

 titlan ; Rio Guacalate (all in Guatemala) . 



A dini a guatemalensis Jordan & Evermann, Bull. 47, U.S. Nat. Mus., 1896, 660. 



Zoogoneticus guatemalensis Meek, Field Col. Mus. Pub. 65, 1902, 94. 



