108 DESCRIPTION OF. [Polygastrica. 



54. CBYPTOMONAS curvata. The curved Cryptomonas. 

 Form compressed, slightly bent like the letter S, and 

 twice as long as it is broad ; colour green. Found amongst 

 conferva. Size l-570th. 



55. CRYPTOMONAS ovata (Enchelys viridis, M.) The 

 egg-shaped Cryptomonas. Form depressed, oval, and twice 

 as long as broad ; colour green. Motion slow, vacillating, 

 and rotating on the longitudinal axis ; but when obstructed, 

 the creature is seen to leap. Lorica paper-like, not hard, 

 and the numerous internal and transparent vesicles per- 

 ceived amongst the green ova are the alimentary sacs. In 

 the middle of the creature there are two or three egg- 

 shaped bodies, supposed to be seminal glands, and at the 

 posterior part a single variable vesicle of a sexual nature ; 

 self-division not observed. Figures 21 and 22 represent 

 two full grown creatures (side and back view), magnified 

 300 diameters ; and figure 23, a young one. Found 

 amongst conferva. Size l-570th. 



56. CRYPTOMONAS erosa. The marginated Cryptomonas. 

 Body depressed, oval ; colour green, anterior part 

 hyaline. Found in clean water, among conferva. Size 

 1- 960th. 



57. CRYPTOMONAS cylindrica (Enchelys viridis, M.) 

 The cylinder-shaped Cryptomonas. Body elongated, sub- 

 cylindrical, three times as long as broad. Found amongst 

 conferva. Size almost 1- 1000th. 



58. CRYPTOMONAS (?) glauca. The blueish Crypto- 

 monas. Form oval, twice as long as broad ; anterior portion 

 truncated, double flagelliform proboscis. Body turgid, and 

 of a blueish -green colour Found with the Chlamidomonas 

 pulvisculus. Size 1 -864th. 



