4IO 



The Ohio Naturalist. 



[Vol. IX, No. 2, 



in the Scyphomedusan, Cassiopea xamachana, "there is a well 

 marked difference between the second and the first regeneration 

 in favor of the former." 



A rather long interval followed upon the second operation, 

 before the plants commenced to regenerate again. The new 

 stems were now growing from the axils between the stump of the 

 old epicotyl and the stumps of the regenerated stems that W'ere 

 cut off March 15; and also from the axils between the latter ones 

 and the cotyledons. In other words, in place of the two stems 

 which had regenerated after the first operation there were regen- 

 erating now four stems, as may be seen from the accompanving 

 diagram. It should be mentioned, however, in this connection, 

 that the four stems have not always regenerated equally well 

 from each plant. 



The following Table III contains data concerning transpira- 

 tion, weight of all the regenerated material and also extracts 

 from protocols, relating to the condition of the plants: 



Table III. 

 March 15 to April G, 1908. 



*Total transpiration for 13 days only; the plants died soon afterwards. 



