( 168 ) 



Such might also throw additional light on the changes that take place 

 in other species under similar influences ; changes which in plants that 

 live under water are more than usually abundant, and with which we 

 are as yet but imperfectly familiar. Facts tending to elucidate these 

 changes are the more valuable from the difficulty in collecting them, as 

 it is no easy matter to have the species so permanently under our eye 

 as to enable us to study its economy with sufficient continuity. 



ECTOCARPTJS AMPHIBIUS. 



EXPLANATION OF DISSECTIONS, &c. 



Fig. 1. — Tnit of Uctocarpus amphibms, natural sire. 

 2. — Branch. 

 3. — Fruited ramulus. Both masrnified. 



