TESTA CEA 



235 



A single nucleus, posterior; a single contractile vacuole. Filo- 

 podia long straight or branching, but not anastomosing. Several 

 species. 



Pseudodifflugia gracilis Schlumberger (Fig. 94, b). Test 

 yellowish or brownish. Subspherical, with fine sand-grains; 

 aperture without neck. About 30 to 55 microns long. In fresh 

 water. 



Fig. 94 a. Lecythium hyalinum. X500 (After Cash and Wailes). 



b. Pseudodifflugia gracilis. X500 (After Cash). 



c. Diaphoropodon mobile. X400 (After Cash and Wailes). 



d. Clypeolina niarginata. X500 (After Cash and Wailes). 



Genus Diaphoropodon Archer. Test ovoid flexible, with 

 minute foreign bodies and a thick covering of fine, hyaline 

 hair-like projections ("cil"). Pseudopodia long, filose, branch- 

 ing, but not anastomosing. 



Diaphoropodon mobile Archer (Fig. 94, c). Test brown; 



