lOlR ON CTPRIN^ODOXT FISHES. 



p. 346 (1866); Gavinan, Mem. Mus. Comp. Zool. xix. 1895, 

 p. 57. 



Girarclinus t^ersicolor Giinth. t. c. p. 352. 



Acropoecilia tridens Hilgendorf, Sitztmgsb. Naturf. -Freunde, 

 1889, p. 52. 



$ . Depth of body 3 to 4 in the letigth, length of head 

 3| to 4. Diameter of eye 3 to 3^ in length of head ; inter- 

 orbital width 1| to 2. 26 to 28 scales in a longitudinal series. 

 Dorsal 7—9 ; origin equidistant from some part of operculum and 

 base of caudal ; middle rays longest, about -| the length of head. 

 Anal 8-10 ; oi-igin a little in advance of that of dorsal. Pectoral 

 a little shorter than head ; pelvics about reaching vent. Least 

 depth of caudal peduncle |- to |- the length of head. Olivaceous, 

 edges of scales darker ; an indistinct lateral band or a series of 

 short vertical bars ; sometimes irregular dark spots on the back ; 

 a blackish spot on base of posterior part of dorsal ; caudal 

 sometimes with vertical bands. 



(^ . In specimens of 30 mm. dorsal and pelvic fins as in 2 ? but 

 in those of 40 to 45 mm. dorsal more elevated, the longest rays 

 I length of head, second pelvic ray somewhat produced and inner 

 pelvic rays expanded and truncated at ends. 



San Domingo. 



Ten females, 35 to 60 mm., including the types of the species, 

 and four males, 30-45 mm. 



EXPLANATION OP THE PLATES. 



Plate XCIX. 



Figs. 1, 2. Gamhusia oligosticta, $ & (J. 

 3, 4. „ ivrayi, $ & ^ . 



5, 6. „ gracilior, $ & (^ . 



7. ,, dominicensis, ^ • 



Plate C. 



Figs. 1, 2. Poecilia piota, ? & (? . 



3, 4. Pceoiliopsis istlimensis, ^ &, ^ . 



5, 6. Fhalloceros caudomaculatus, '^ & ^ . 



7, 8. Fhalloptychws januarius, '^ & ^ . 



Plate CL 



Figs. 1, 2. Limia nic/rqfasoiata, ^ & (J. 

 3, 4. „ heterandria, $ & cJ. 



5. „ arnoldi, ^ . 



6. ,, catidofasciata, $ , 



7. „ ornata, $ . 



