406 HANDBOOK OF PROTOZOOLOGY 



Periacineta bucket (Kent) (Fig. 174, a). Attached to Lym- 

 naea, etc. 



Genus Hallezia Sand. Without test; with or without a short 

 stalk; body variable in form. Tentacles in fascicles. 



Hallezia br achy poda (Stokes) (Fig. 174, b). Standing water 

 with dead leaves. Body about 34 to 42 microns in diameter. 



Genus Solenophrya Claparede and Lachmann. Body not 

 filling the cup-like test. Attached by the base of the test. 



Solenophrya inclusa Stokes (Fig. 174, c). Standing fresh 

 water. Lorica subspherical and about 44 microns in diameter. 



Solenophrya pera Stokes (Fig. 174, d). Test satchel-shaped; 

 44 microns high. Body about 35 microns long. Standing fresh 

 water. 



Genus Acinetopsis Robin. Close-fitting test polyhedral and 

 short stalked. One to six long and active tentacles in the center 

 of the anterior end. 



Acinetopsis tentaculata Root (Fig. 174, e, /). Attached to 

 species of Obelia. Test 185 microns long; stalk 285 microns 

 long; body about 138 microns by 100 microns. 



Genus Tachyblaston Martin. Ectoparasitic on Ephelota. 

 No contractile vacuoles. 



Tachyblaston ephelotensis Martin (Fig. 174, g, h). 



Genus Dactylophrya Collin. Test with a short stalk. 12 to 

 15 arm-like tentacles, each terminating in a sucker, extended 

 from the anterior end. 



Dactylophrya roscovita Collin (Fig. 174, i). Rare; on the 

 stalk of the hydrozoan, Diphasia attenuata. 



Genus Pseudogemma Collin. Parasitic in other Suctoria, 

 such as Acineta or Paracineta, 



Pseudogemma pachystyla Collin (Fig. 174, j). In Acineta 

 tuber osa. 



Genus Endosphaera Engelmann. Body spherical and with- 

 out axial differentiation. Tentacles and stalk absent. Endo- 

 parasitic in other Protozoa. 



Endosphaera engelmanni Entz. In Trichodina pediculus, 

 Didinium nasutum, Vorticellidae, etc. 



