992 MR. C. TATE REGAN ON 



Synojysis of the S2)ecies. 



I. Origin of dorsal fin in, or a little in advance of, middle of 



entire length (including caudal fin), above anterior part or 

 middle of anal. 



A. D. 10-12; no black spot on anal fin annectens. 



B. D. 8-9; a blackish spot on anal fin. 



Length of head 3^ to SJ in length of fish (without caudal) episcopi. 



Length of head 4| to 4| in length offish (without caudal) nigroventralis. 



II. Origin of dorsal fin much nearer to end of caudal fin than 

 to tip of snout, above posterior part or posterior end of 

 anal. D. 7-8. 



A blackish spot on anal fin parismina. 



7 or 8 dark vertical bars on posterior part of body tridentiger. 



8 or 9 dark bars on anterior | of body tiirrubarensis. 



1. PrIAPICHTHYS ANNECTENS. (Text-fig. 170 B.) 



Gambusia annectens Regan, Ann. Mag. N. H. (7) xix. 1907, 

 p. 259, and Biol. Centr.-Amer., Pisces, p. 97, pi. xiv. figs. 5, 6 

 (1907). 



Costa Rica. 



2. Priapichthys episcopi. 



Gambusia episcopi Steincl. Sitzungsb. Akad. Wien, Ixxvii. 1878, 

 p. 387, pi. ii. figs. 3, 4. 

 Panama. 



3. Priapichthys nigroventralis. 



Gambusia nigroventralis Eigenm. Indiana Univ. Studies, 1912, 

 No. 8, p. 26. 



Rio San Juan, Colombia. 



4. Priapichthys parismina. 



Gambusia parismina Meek, Publ. Field. Mus., Zool. x. 1912, 

 p. 71. 



Costa Rica. 



5. Priapichthys tridentiger. 



Gambusia tridentiaer Garman, Mem. Mvis. Comp. Zool. xix. 

 1895, p. 89. 

 Panama. 



6. Priapichthys turrubarensis. 



Gambusia turrtiharensis Meek, Publ. Field Mus., Zool. x. 1912, 

 p. 71. 



Costa Rica. '' 



Perhaps a synonym of P. tridentiger. 



6. Priapella, gen. nov. 



This ge lus shows relationship to Priapichthys in the structure 

 of the long inti^omittent organ as well as in other characters. 



