EUCILIATA, HOLOTRICHA 



695 



end; elongate pyriform, anterior end curved; ciliation longitudinal 

 and dense. One species. 



L. recurva (Claparede and Lachmann) (Fig. 297, /). In the gastro- 

 vascular cavity of Planaria limaeina; about 200/* long. 



Genus Sieboldiellina Collin. Vermiform, with neck-like constric- 

 tion; simple sucker at anterior end. One species. 



S. planariarum (Siebold) (Fig. 297, g). Up to 70(V long; in gastro- 



Fig. 297. a, Protanoplophrya stomata, X100 (Miyashita); b, Opalinopsis 

 sepiolae, X670 (Gonder); c, d, Chromidina elegans (c, X330 (Chatton and 

 Lwoff); d, X220 (Wermel)); e, Haptophrya michiganensis, X35 (Wood- 

 head) ; f, Lachmannella recurva, XlOO (C6pede) ; g, Sieboldiellina planaria- 

 rum, X100 (Cepede);h, i, Intoshellina poljanskyi (h, X300; i, attaching 

 organella seen from ventral side, X870) (Cheissin); j, k, Monodontophrya 

 kijenskiji (j, XlOO; k, anterior end in profile, X870) (Cheissin). 



