EU CI LI AT A, HOLOTRICHIDA 341 



Genus Anoplophrya Stein. Body elongated vermiform with 

 rounded ends. An elongated macronucleus irregularly outlined. 

 Micronucleus small. Parasitic in the intestine of Annelida, 

 Gastropoda, and Crustacea. 



Anoplophrya naidos (Dujardin) (Fig. 146, c). In the digestive 

 tract of the polychaete, Nais serpentina. Body about 200 

 microns long. 



Genus Mesnilella Cepede. Elongated body similar to 

 Anoplophrya, but containing a rigid rod. 



Mesnilella clavata (Leidy) (Fig, 146, d). Found in the in- 

 testine of Lumbricus variegatus. Length up to 160 microns. 

 With a number of contractile vacuoles arranged in a longitu- 

 dinal row. 



Genus Hoplitophrya Stein. Body oval. There is a protru- 

 sible chitinous structure embedded in the cytoplasm, which 

 serves for attachment of the body to the intestinal epithelium 

 of the host. Parasites of Lumbricus. 



Hoplitophrya lunibrici (Dujardin) (Fig. 146, e). In the in- 

 testine of Lumbricus terrestris. 



Genus Maupasella Cepede. With a spinous fixing cell-organ 

 at the anterior end of the body. A number of myonemes run 

 inward from the base. Parasitic in the intestine of Lumbricus. 



Maupasella nova Cepede (Fig. 146,/). In the intestine of an 

 African Lumbricus. 



Genus Schultzellina Cepede. Similar to Maupasella, but 

 attaching cell-organ making some angles with the main axis of 

 the body. 



Schultzellina mucronata Cepede (Fig. 146, g). In the in- 

 testine of the earthworm, Allurus tetraedurus . 



Genus Kofoidella Cepede. Broadly pyriform organism, 30 

 to 80 microns long. A large macronucleus; a contractile vacuole 

 in the posterior third. 



Kofoidella eleutheriae Cepede (Fig. 146, A). Commonly 

 found in the gastrovascular cavity of the medusa, Eleutheria 

 dichotoma. 



Genus Intoshellina Cepede. Body elongate, and ciliary rows 

 are slightly spiral. Macronucleus long. Contractile vacuoles 

 five to seven in number. A cell-organ of attachment, vestigial 

 cytostome and cytopharynx at the anterior end. 



