AMOEBOID PROTOZOA (SARCODINA) 



233 



152 (149) 



Envelop spherical Diplophrys Barker. 



Representative species Diplophrys archer i Barker 1868. 



In this species the pseudopodia, which are long and branched, extend 

 from opposite poles of the envelop. The protoplasm always encloses 

 a large spherical globule usually yellow or brown in color. A nucleus 

 and one or more contractile vacuoles are present. Habitat sphagnum. 

 Diameter 8 to 20 /x. 



Fig. 348. Diplophrys archeri. X 1200. (.'\fter Penard.) 



153(148) Pseudopodia extending from a single aperture 154 



154 (155) Envelop very flexible, changeable in shape. 



Lieberkuhnia Claparede and Lachmann. 

 Representative species. . . Lieberkuhnia wageneri C. and L. 1858. 



The envelop is normally pyriform but changeable in shape. 

 Pseudopodia long, anastomosing, extending from a protoplasmic 

 peduncle at the aperture. Nuclei as many as 200. Contractile 

 vacuoles numerous. Habitat mosses. Length 96 /i> 



Fig. 349. LieberkUh'iii wageneri. X 130. (After Penard.) 



155 (154) 



156 (157) 



Envelop rigid or slightly flexible 156 



Body filling the envelop Gromia Dujardin. 



Representative species Gromia fluviatil is T>w]diX(]\n i^^i. 



Envelop spherical or ovoid, seldom changing shape. The outer 



surface of the envelop is covered by a delicate sheath of proto- 



/ ".!^ plasm in which minute granules circulate. Pseudopodia numerous, 



''..:_^ anastomosing. Habitat among aquatic plants. Diameter 90 to 



. - 250 n. This species is identical with Gromia terricola Leidy. 



--;."" Fig. 350. Gromia fluvial His. X 25. (After Leidy.) 



157 (156) Body not filling the envelop Microgromia R. Hertwig. 



Representative species. . . Microgromia social is R. Hertwig 1S74. 



Envelop rigid with a short neck. Pseudopodia long, anastomosing, aris- 

 ing from a peduncle at the aperture. Sometimes colonies are formed. 

 Habitat standing water. Length 20 m- Conn reports a form from Con- 

 necticut which he refers to this species with some doubt as to its identity. 



Fig. 351. 



Microgromia socialis. cv, contractile vacuole; n, nucleus. 

 (After Hertwig.) 



X 545. 



158 (145) Pseudopodia ray-like, soft, and anastomosing when touching. 



Subclass Proteomyxa . . 1 50 



159 (160) Body amoeboid; endoplasm colorless. . . Nuclear ia Cienkowsky. 

 Representative species. . . . Nuclearia simplex Cienkowsky i^b^. 



Body normally spherical but capable of changing shape. Pseudopodia 

 arising from all parts of the body. Nucleus central, contractile vacuoles 

 more than one. Diameter 20 to 50 m- Reported by Conn from Connecti- 

 cut. 



Fig. 352. Nuclcaria simplex. X 250. (.Vfter Cona.) 



