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HANDBOOK OF PROTOZOOLOGY 



Cysts 30 to 40 microns in diameter, 20 microns in width. Keilin 

 studied preserved material. 



Genus Entorhipidium Lynch. Large and colorless body pyri- 

 form, flattened. Anterior end broadly rounded, posterior end 

 drawn out. Permanently opened cytostome on the dorsal sur- 

 face near the right border in a depression. Cytopharynx indis- 



Fig. 155 a. Colpoda helia. X400 (After Stokes). 



b. C. campyla. X400 (After Stokes). 



c. C. cucullus. X400 (After Maupas from Biitschli). 



d. C. inflata. X400 (After Stokes). 



e. Colpidium striatum. X500 (After Stokes). 



f. C. colpoda from salt water. X500 (After Calkins). 



g. h. Trophozoite: and cyst oi Lambornella stegomyiae. X250 



(After Keilin). 



i. Entorhipidium echini. X200 (After Lynch), 



j. Microthorax sulcatus. X400 (After Engelmann). 



k. Cinetochilum margaritaceum. X400 (After Schewiakoff). 



tinct. Trichocysts present. A single macronucleus and one to 

 several micronuclei; several "excretory" vacuoles. Several 



