AMOEBOID PROTOZOA (SARCODINA) 



2 33 



152 (149) Envelop spherical Diplophrys Barker. 



Representative species Diplophrys archeri 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 . 



FIG. 348. Diplophrys archeri. X 1200. (After Penard.) 



153 (148) Pseudopodia extending from a single aperture 154 



*54 ( I 5S) Envelop very flexible, changeable in shape. 



Lieberkilhnia Claparede and Lachmann. 

 Representative species. . . Lieberkiihnia 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 /* 



FIG. 349. Lieberkiihnij wageneri. X 130. (After Penard.) 



X 55 ( J 54) Envelop rigid or slightly flexible 156 



J 5 6 (!57) Body filling the envelop Gromia Dujardin. 



Representative species Gromia fluviatilis Dujardin 1841. 



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 ft. This species is identical with Gromia terricola Leidy. 



FIG. 350. Gromia fluviatilis. X 25. (After Leidy.) 



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



Representative species. . . Microgromia socialis R. Hertwig 1874. 



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 /u. 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; , nucleus. X 545. 

 (After Hertwig.) 



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



Subclass Proteomyxa . . 1 59 



159 (160) Body amoeboid; endoplasm colorless. . . Nuclearia Cienkowsky. 

 Representative species. . . . Nuclearia simplex Cienkowsky 1865. 



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 /* Reported by Conn from Connecti- 

 cut 



FIG. 352. Nuclearia simplex. X 250. (After Coon.) 



