RHIZOPODS. 



131 



12. CLATHRULfNA ^LECJANS (Fig. 105). 



A hollow globe of silicious lattice-work elevated on 

 a crystalline stem. Within this exquisite dwelling the 

 spherical, coltirless animal lives, extending its fine 

 long pseudopodal rays 

 through the almost circular ■■. \ , 



windows in search of food. 

 The stem is attached to 

 aquatic plants or to other 

 submerged objects. ClaiA- 

 rultna is the only fresh-water 

 Rhizopod that is not free- 

 swimming. It is common in 

 many ponds, attached to. 

 the rootlets of Lemna. It 

 can never be mistaken for 

 anything else, even at first 

 sight. 



In this small book it is 

 possible to refer to only "a 

 very few of the commonest 

 of these beautiful and in- 

 teresting animals, about 

 whose life-history very little 



is known. They form a department in which there is 

 room for much original investigation. Those who de- 

 sire to pursue the subject, or to know more of the 

 Rhizopods than can be included here, would do well to 

 refer to Dr. Joseph Leidy's "Fresh-water Rhizopods 

 of North America," published by the United States 

 Geological Survey of the Territories, or to Mr. 

 Romyn Hitchcock's "Synopsis of the Fresh-water 

 Rhizopods," a useful condensation of Dr. Leidy's 

 splendid work. 



Fig, 105. — Clathrulina 61egans. 



