GENUS HETEEOPHEYS— HETEEOPHETS MYEIAPODA. 245 



Fig. 7 represents an individual from Absecom pond, obtained in 

 September, exhibiting the different changes which occurred in the pseudo- 

 podal rays during the time the animal was observed. 



Figs. 8, 9, represent two views of another individual, found with the 

 former, exhibiting successive changes, both in the shape of the body and 

 the pseudopodal rays. At first spherical, it became elliptical, and again 

 assumed the former shape, when it measured 0.02 mm. in diameter. 



An individual of the same kind, from a sphagnous swamp of Broad 

 Mountain, Pennsylvania, is represented in fig. 12. As first noticed, the 

 body was globular, with numerous simple rays projecting from one hemi- 

 sphere, but later they emanated from all parts of the surface. The interior 

 was composed of colorless granular protoplasm with fine oil-like molecules, 

 greenish and yellowish granules, and a few bright-red ones. It also con- 

 tained a large oval body, probably something swallowed as food, but the 

 character of which was not ascertained. Neither nucleus nor contractile 

 vesicle was seen. 



Another individual, apparently of the same kind, represented in fig. 11, 

 was obtained, in association with others, with the alga Lyngbya, from a 

 roadside gutter in the suburbs of Philadelphia. The soft body of a dif- 

 fused green hue, except at the surface, which was colorless, contained many 

 red-colored objects, which appeared to be segments of the Lyngbya used 

 as food and changed in color by digestion. 



Similar Heliozoans, from bog- water obtained in the Uinta Mountains, 

 Wyoming, are represented in figs. 1-3, pi. XLV, and fig. 13, pi. XLYI. In 

 constitution and habit they resembled the former, but they were usually 

 yellowish, with a few bright-red granules, though sometimes they were also 

 partly greenish. In all, a pale central nucleus was more or less distinctly 

 visible, and usually some clear globules or vacuoles. 



The individual of fig. 13, pi. XL VI, contained a number of scattered 

 corpuscles of different sizes and colors,— green, dull yellow, and red. These 

 I supposed to be one-celled algse in various stages of digestion. At first 

 elliptical, the animal afterward became spherical, and measured 0.028 mm. 

 in diameter. 



The individual of fig. 1, pi. XLV, contained some diffused yellowish 

 and greenish granular matter mingled with the otherwise coloriess proto- 

 plasm. It also contained some oil molecules and clear vacuoles 



