CRYPTOMONADINA 



273 



Family 1 Cryptomonadidae Stein 

 Genus Cryptomonas Ehrenberg. Elliptical body with a firm pelli- 

 cle; anterior end truncate, with 2 flagella; dorsal side convex, ventral 

 side slightly so or flat; nucleus posterior; "cytopharynx" with gran- 

 ules, considered trichocysts by some observers (Hollande, 1942, 

 1952); 2 lateral chromatophores vary in color from green to blue- 

 green, brown or rarely red; holophytic; with small starch-like bodies 

 which stain blue in iodine; 1-3 contractile vacuoles anterior; fresh 

 water. Several species. Morphology and taxonomy (Hollande, 1942, 

 1952). 





Fig. 111. a, Cryptomonas ovata, X800 (Pascher);b, Chilomonas Para- 

 mecium, X1330 (Biitschli); c, d, Chrysidella schaudinni, X1330 (Winter); 

 e, Cyathomonas truncata, X670 (Ulehla); f, Cryptochrysis commutata, 

 X670 (Pascher); g, Rhodomonas lens, X1330 (Ruttner); h, Nephroselmis 

 olvacea, X670 (Pascher) ; i, Protochrysis phaeophycearum, X800 (Pascher); 

 j, k, Phaeothamnion confervicolum, X600 (Kiihn). 



C. ovata E. (Fig. Ill, a). 30-60/x by 20-25/x; among vegetation. 



Genus Chilomonas Ehrenberg. Similar to Cryptomonas in general 

 body form and structure, but colorless because of the absence of 

 chromatophores; without pyrenoid; "cytopharynx" deep, lower half 

 surrounded by granules, considered by Hollande (1942) and Drag- 

 esco (1951) as trichocysts; one contractile vacuole anterior; nucleus 

 in posterior half; endoplasm usually filled with polygonal starch 

 grains; saprozoic fresh water. 



C. Paramecium E. (Fig. 111,6). Posteriorly narrowed, slightly bent 

 "dorsally"; 30-40 m by 10-1 5m; saprozoic; widely distributed in stag- 



