PLATE XL II. 



EAPHIDIOPHRTS ELEGANS. 



Fig. 1. A group of twenty indiyiduals, associated by narrow isthmus-like tands. From a spring 

 in which grew water-cress, near Darby, Delaware County, Pennsylvania, May, 1874. 250 diameters. 



Fig. 2. A more compact group, in which the isthmus-like connections were comparatively few. 

 Same locality. 200 diameters. 



Fig. 3. A group of three individuals, part of the group of fig. 1. 500 diameters. 



Fig. 4. Part of a group, which consisted of thirty-eight individuals. 500 diameters. 



Fig. 5. An isolated individual in the act of takinga zoospore of an alga. 1,000 diamcteis. Col- 

 lected with the preceding. 



Fig. 6. A group of nine colorless individuals. Abs^com pond, New Jersey, September, 1874. A 

 similar group of fifteen was observed. 500 diameters. 



