AMOEBOID PROTOZOA (sARCODINA) 221 



(27) Hemispherical to cup-shaped, densely coated with organic particles. 



Diploclilamys fimida Penard iqoo. 



Yellowish-gray or brown. Inner membrane very delicate, flexible 



but resistant. Nucleus single. Vacuoles numerous. PseuflojxKJia 



y'\vj^^-/X large at the base, pointed, rarely extended. Diameter 45 ^t. Habitat 



'-^^"^a"^ mosses. Reported from Ontario by Dr. Penard. 



'^x^ Fig. 284. Diploclilamys timida X 275. (After Pen.ird ) 



29 (26) Shell membrane single .30 



30 (31) Hemispherical; slightly or not at all flexible. . . Parmulina Penard. 



Representative species Parmulina cyalhus Penard 1902. 



In this species the shell is rigid but in P. obtrcla Gruber it is flexible 



about the aperture. Shell is coated with fine particles of sand. dirt. etc. 



___. Pseudopodia are broad, rounded lobes extending from the aperture. 



/o- '*^ Nucleus and contractile vacuole each single. Habitat among mosses. 



.^ '..*"• .^ j)janieter 45 //. 



Fig. 285. Parmulina cyalhus. X 27v (After Penard.) 



31 (30) Commonly ovoid or hemispherical, but very changeable. 



Corycia Dujardin. 

 Representative species Corycia flava Gtqq^ i^dd. 



The membranous covering is dome-shaped but very changeable in 

 1^^^^^^^ form. Pseudopodia very short and thick. Vacuoles numerous, 



i (^ "to^ 0^ Nucleus single, usually concealed by the granules of the endoplasm. 



V Vl^®;'^^^,^^ Habitat among mosses. Diameter 80 to 100 m- 



^^^i^si^-^"**"^ Fig. 2S6 Corycia flava. X 210 (After Penard.) 



32 (25) Membrane without foreign particles; regularly punctate. . . ■ i?, 



33 (34) Patelliform; slightly flexible Microchlamys Cockerell. 



Representative species. 



Microchlamys patella Claparede and Lachmann i860. 



Shell circular from dorsal or ventral view convex above with a 



very large aperture beneath. Pseudopodium single. Contractile 

 vacuoles numerous. Nucleus single. Habitat among mosses in 

 swamps. Diameter 40 n. 



Fig. 287. Microchlamys patella. X .^10. (After Penard.) 



34 (33) Commonly dome-shaped, but exceedingly flexible and changeable. 



Cochlio podium Hertwig and Lesser. 

 Representative species. . CocJil io podium bilimbosum AueThach 1856. 



y^^^X The membranous covering is capable of great expansion, especially at 



r>''''^m ^^^ aperture. Pseudopodia pointed, usually numerous. Nucleus and 



KilCH contractile vacuole each single and large. Common among algae. 



y^^^^'^^^^-r^ Diameter of envelop 25 to 50 fi. 



f'"';f''"'\ Fig. 288. Cochliopodium bilimbosum. m, nucleus. X 300. (After Leidy.) 



35 (24) Shell membranous, rigid '^^ 



36(45) Shell discoidal ^^ 



37 (44) Shell with regular markings more or less distinct. No foreign par- 



ticles attached. Aperture central ,^8 



38 (43) Shell with regular, distinct punctae. Aperture small. 



Arcclla Ehrenberg . . 30 



39 (42) Periphery of shell without projecting points 4° 



