SPIROTRICHA, HETEROTRICHA 



809 



without ring-furrow in middle; with or 

 with spiral 



end; more or less vertical; 

 without style; salt water. 



P. arctica D. (Fig. 345, g). Lorica about 43(V high, 

 ridge; off Norweigian coast 15-28 m. deep. 



Genus Parafolliculina Dons. Neck of lorica with a basal swelling; 

 attached either with posterior end or on a lateral surface; salt water. 



P. violacea (Giard) (Fig. 345, h). Total length 225-288 /x; widely 

 distributed in salt water (Andrews, 1921, 1942). 



Family 7 Clevelandellidae Kidder 



Genus Clevelandella Kidder (Clcvelandia K.) . Elongate pyriform 

 or spear-shaped; posterior region drawn out, at the end of which 

 peristome and cytostome are located; body more or less flexible; 

 completely ciliated; one macro nucleus supported by a karyophore; 

 a micro nucleus; a contractile vacuole at posterior left, near cytopyge; 



*m§0 



Fig. 346. a, b, ventral and dorsal views of Clevelandella panesthiae, 

 X300; c, d, Paraclevelandia brevis (c, ventral view, X760; d, a cyst, X740) 

 (Kidder); e, Peritromus calif ornicus, X360 (Kirby); f, Lichnophora mac- 

 farlandi, X420; g, L. conklini, X340 (Stevens). 



