﻿SNAIL HOST OF ORIENTAL LUNG FLUKE — ABBOTT 



101 



Figure 41.— Map of Lithia Spring, Fla., showing collecting stations (1 to 11) and water 

 currents. Short arrows=sprIng water; long, broken arrows = river currents. 



but, again, this is possible only if dissections can be made to determine 

 whether the specimens in question are adult. 



It is interesting to note the distance separating the mode of the 

 immature curve and that of the adult curve in each population. Were 

 these distances proportionately the same in each population, we could 

 safely assume that the production of yomig was brought about simul- 

 taneously throughout the various populations of the spring and was 



