228 



HANDBOOK OF PROTOZOOLOGY 



brownish. Difflugia-like in general appearance, compressed; 

 with or without foreign bodies. Pseudopodia long and acutely 

 pointed. 



Cryptodiffliigia oviformis Penard (Fig. 90, d). Test ovoid, 

 compressed; without foreign bodies. Crown hemispherical. 

 Aperture truncate. The cytoplasm contains chlorophyllous 

 food particles. Length about 15 to 20 microns. In marshy 

 ground among Sphagnum. 



Genus Lesquereusia Schlumberger. Test compressed, oval 

 or globular in profile, narrowed at the neck which is bent; 

 semi-spiral in appearance. With curved or comma-shaped rods 

 or with sand-grains (in one species). The protoplasmic body 

 does not fill the test. Pseudopodia long, blunt; simple or 

 branched. . 



Fig. 90 a. Pseudochlamys patella. X500. 

 b, c. Difflugiella apiculata. X400. 

 d. Cryptodifflugia oviformis. X480 (AH after Cash). 



Lesquereusia spiralis (Ehrenberg) (Fig. 91, a). Aperture 

 circular; border distinct. The cytoplasm appears pale yellow. 

 A single nucleus. About 120 microns long by 95 microns broad. 

 In marsh. 



Genus Hyalosphenia Stein. Test ovoid or pyriform; aper- 

 ture convex; homogeneous and hyaline, mostly compressed. 

 Crown uniformly arched. Protoplasm partly filling the test. 

 Several blunt pseudopodia simple or digitate. Some ten 

 species. 



Hyalosphenia papilio Leidy (Fig. 91, b). Test yellowish; 

 transparent or delicately punctated ; in front view, pyriform or 

 oblong. A minute pore on each side of crown and sometimes 

 one also in the center. Aperture convex. In narrow lateral view, 

 elongate pyriform, aperture a shallow notch. The protoplasm 

 contains chlorophyllous particles and oil globules. Posteriorly 



