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HANDBOOK OF PROTOZOOLOGY 



Genus Frontonia Ehrenberg. Elongated cylindrical; ex- 

 tremities rounded or pointed. Ciliation and striation uniform. 

 Cytostome near the anterior end, oblong; surrounded by elevat- 

 ed ridges which extend posteriorly for some distance. Cyto- 

 pharynx short with rods and two undulating membranes. 

 Macronucleus ellipsoidal; several micronuclei. One or two con- 

 tractile vacuoles with radiating canals. Trichocysts. Fresh or 

 salt water. 



Frontonia leucas Ehrenberg (Fig. 154, g). Body 250 to 300 

 microns long. In infusion. 



Genus Glaucoma Ehrenberg. Body ovoid, ventral surface 

 flattened; dorsal surface convex. Cytostome about one-fourth 

 from the anterior end ; triangular or crescent in form, with 



Fig. 154 a. Urocentrum turbo. X150 (After Biitschli). 



b. Ophryoglena fiava. X55 (After Biitschli). 



c. Cyrtolophosis mucicola. X500 (After Stokes). 



d. Loxocephalus granulosus. X300 (After Kent). 



e. Uronema marina. X350 (After Calkins). 



f. Dallasia frontata. X 580 (After Calkins and Bowling). 



g. Frontonia leucas. X 150 (After Edmondson). 

 h. Glaucoma scintillans. X180 (After Biitschli). 

 i. G. pyriformis. X 1000 (After McArthur). 



