136 The Mastigophora 



Fig. 4. 15. Cryptochrysidae and Cryptomonadidae. A. Chroomonas vectinsis 

 Carter, xl845 (after C). B. Cyst of Cryptomonas ovata, xl770 approx. (after 

 Hollande). C. Rhodomonas bnltica Karsten, xl440 (after Carter). D. Crypto- 

 chrysis commutata Pascher, xl250 (after P.). E. Rhodomoyias lacustris Pascher 

 and Ruttner, x2400 (after Pascher). F, G. Cryptochrysis atlantica Lackey, ven- 

 tral and lateral views; xl450 approx. (after L.). H. Chroomonas baltica 

 (Biittner) Carter, xl560 (after C). I. Cryptomonas similis Hollande, showing 

 gidlet, contractile vacuole, chromatophore and nucleus; diagiammatic (after 

 H.). J, K. Cryptomonas ovata, diagrammatic cross-sections anterior to, and at 

 the level of the nucleus; note gullet, "trichocysts" and chromatophore (after 

 Hollande.) L. Chilomonas Paramecium, showing "pharyngeal" groove and 

 contractile vacuole; diagrammatic (after Hollande). 



of refractile granules are usually visible, is not closed ventrally. The 

 flagella arise near the anterior end of the groove. 



Chlorophyll-bearing types include: Chroomonas Hansgirg (31, 202; Fig. 4. 15, A, H), 

 with one or two bluish chromatophores; Cryptochrysis Pascher (175, 202; Fig. 4. 15, D, 



