240 HANDBOOK OF PROTOZOOLOGY 



ranged in longitudinal rows; aperture bordered with regularly 

 arranged denticulate scales. Usually with spines. One or two 

 nuclei large, placed centrally; contractile vacuoles. Filopodia, 

 dichotomously branched. Numerous species. 



Euglypha acanthophora (Ehrenberg) ( = E. alveolata Du- 

 jardin) (Fig. 1). Test ovoid, or slightly elongate toward the 

 aperture. 3 to 7 scales protruding around the circular aperture. 

 Body-scales elliptical. The cytoplasm almost fills the test. 

 Length 50 to 100 microns. In sphagnum and submerged plants. 



Euglypha cristata Leidy (Fig. 96, a). Elongated test small, 

 not compressed, with a long neck, fundus rounded with 3 to 

 8 spines.. Scales oval. Aperture circular and bordered by a 

 single row of 5 or 6 denticulated scales. Cytoplasm colorless. 

 A single posterior nucleus. Filopodia fine. Reserve scales are 

 collected around the exterior of the aperture, unlike other forms 

 in which they are kept within the cytoplasm. Length 30 to 70 

 microns; diameter 10 to 25 microns. In mosses. 



Euglypha mucronata Leidy (Fig. 96, h). Test large, fundus 

 conical, with one or two terminal spines. Aperture circular 

 bordered by a single row of 6 to 8 denticulated scales. Length 

 100 to 150 microns; diameter 30 to 60 microns. In sphagnum. 



Genus Paulinella Lauterborn. Test small ovoid, not com- 

 pressed; with silicious plates in alternating transverse rows. 

 Aperture terminal. The body cytoplasm does not fill the test 

 completely. A single nucleus located posteriorly. 



Paulinella chromatophora Lauterborn (Fig. 96, c). Scales 

 arranged in 11 or 12 rows, five plates in each row. The cyto- 

 plasm with one or two curved chromatophores; no food par- 

 ticles. One contractile vacuole. Length 20 to 32 microns; 

 diameter 14 to 23 microns. Among vegetation of fresh or 

 brackish water. 



Genus C3rphoderia Schlumberger. Test retort-shaped; 

 colorless to yellow, made up of a thin chitinous membrane 

 covered with discs or scales. Aperture terminal, oblique, 

 circular. The cytoplasm does not fill the test completely. 

 Nucleus large, posteriorly located. Pseudopodia few, long, 

 filose, simple or branched. 



Cyphoderia ampulla (Ehrenberg) (Fig. 96, d). Test usually 

 yellow, translucent, composed of discs arranged in diagonal 



