PLATE I. 
(m=mandibular, ¢ = intermaxillary, and y= pharyngeal teeth.) 
Figs. 1 and 2. Cyprinodon variegatus La C. 
m and p from specimen } inches. 
m! from specimen 3} inches. 
m'' from specimen 24 inches. 
Fig. 3.  Cyprinodon carpio Gth. 
Fig. 4. Cyprinodon Floride Goode; Garm. 
Fig. 5. Lebias Sophie Heck. 
Fig. 6. Lebias punctatus Heck. 
Figs. 7 and 8. Jenynsia lineata Jen.; Gth. 
Fig. 9.  Characodon lateralis Gth. 
Figs. 10 and 12. Zygonectes Nottii Ag. 
Fig. 11. Gtrardinichthys innominatus Blkr. 
ig. 13. Zygonectes cingulatus C. V.; Jor. & G. 
Fig. 14. Zygonectes olivaceus Stor.; Ag. 
