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Aaron Franklin Shall 



TABLE IX 



Showinp number of male- and female-producers in the progeny of four individuals of Hydatina senta, 

 one line of which was well-fed in dilute drainage, one well-fed in pure water, one partially starved in 

 dilute drainage, the fourth partially starved in pure water. 



Experiment VIII. The preceding experiment was repeated 

 twice, with modifications as follows: Two lines were well-fed, one 

 in dilute drainage, the other in spring water (A, Table IX); two 

 other lines were partially starved, as described in Experiment III, 

 the one in dilute drainage, the other in spring water (B). In each 

 case four generations were reared under the conditions described 

 without recording the sex of the offspring. The subsequent four 

 or five generations are the ones here recorded, so that any effect 

 that is noticeable may be the cumulative effect of eight or nine 

 generations of treatment, instead of the four or five for which the 

 data are given. The parents in A, at the time the drainage water 

 was applied, were sixth cousins, once removed. The parents of 

 the starved lines (B) were sisters. 



