EUCILIATA, HOLOTRICHA 693 



minal; longitudinally, uniformly, ciliated. A few species. 



P. pelagica C. (Fig. 296, e). In the coelom of copepods (Ascartia, 

 Clausia, Paracalanus) ; about 48/z long. 



Genus Dogielella Poljansky. Pyriform; longitudinal ciliary rows; 

 contractile vacuole terminal; macronucleus spherical, with a spheri- 

 cal or elliptical micro nucleus; in the parenchyma of flat worms or 

 molluscs. 4 species (Poljansky, 1925). 



D. sphaerii P. (Fig. 296, /). 40-10(V by 25-54^: in Sphaerium 

 corneum. Conjugation (Poljansky, 1926). 



D. minuta P. (Fig. 296, g). 12-28^ by up to 20/z; in Stenoslomum 

 leucops (Platyhelminthes). 



D. Virginia (Kepner and Carroll) (Fig. 296, h). 40-50> long; in the 

 same host animal; Virginia. 



D. renalis Kay. Elongate pyriform, but extremely plastic; 61-184^ 

 by 27-82ju; spherical macronucleus in the middle of body; one micro- 

 nucleus; a contractile vacuole anterior; in the renal organ of Phy sella 

 sp. (Kay, 1946). 



Genus Orchitophrya Cepede. Elongate pyriform; ciliary rows 

 oblique; macronucleus spherical, central. One species. 



0. stellarum C. (Fig. 296, i). In gonads of the echinoderm, Aster- 

 acanthion (Asterias) rubens; 35— 65m long. 



Genus Kofoidella Cepede. Pyriform; macronucleus broadly oval; 

 contractile vacuole, subterminal. One species. 



K. eleutheriae C. (Fig. 296, j). In gastro vascular cavity of the 

 medusa, Eleutheria dichotoma; 30-80/x long. 



Genus Herpetophrya Siedlecki. Ovoid; with a pointed, mobile, 

 tactile, non-ciliated cone; macronucleus globular; without con- 

 tractile vacuole. One species. 



H. astomata S. In coelom of Polymnia (annelid). 



Genus Biitschliella Awerinzew. Elongate with pointed anterior 

 end, with non-ciliated retractile anterior cap; cilia in about 10 

 slightly spiral rows; macronucleus band-form; several contractile 

 vacuoles in a longitudinal row. Several species. 



B. opheliae A. (Fig. 296, k). In Ophelia limacina; 280-360m by 

 35-50/x. 



B. chaetogastri Penard. Elongate lanceolate, slightly flattened; 

 longitudinal rows of long cilia; cytoplasm colorless; macronucleus 

 elongate; micro nucleus voluminous, vesicular; without contractile 

 vacuole; 60-120/x long; in the oesophagus of Chaetogaster sp. 



Genus Spirobutschliella Hovasse (1950). Elongate fusiform with 

 rounded extremities; ciliation uniform and in spiral rows; anterior 

 tip not ciliated; pellicle thick; macronucleus, a long spindle reaching 



