PLATE IV. 



(i/i = mandibular, i =^ intcniiaxillarv, and p = pbai'jiigcal tctlli.) 



Fig. 1. Aiuibleps anaMeps Liune. 



Fig. 2. Aiiab/cps inlrrnlcpis Miill. & Tr. 



Fig. ;!. Gtimhusia llolliruokii (Ag.) Grd. ; IMkr. 



Fig. 4. Gambttsia punctata Poey. 



Fig. i). Gambusia cpiscopi St. 



Fig. 0. Giimbiisia gracilis Heck. ; Gtli. 



Fig. 7. Heteratidriii formosa Ag. 



Fig. 8. Heterandria minor Garui. 



Fig. ;). Pcecilid niiiiizoiiica Gann. 



Fig. 10. Gambusia /ridriiliffer Garni. 



Fig. 11. /'aci/ia ritfii/(i Gu'u-h. 



Fig. 12. Pwcilia i/diiiiiiiccHsis C. V. 



Fig. I. "5. I'ierilia splirimps C V. 



Fiir. It. \ipliiipli()riis //r//rri llivk. 



