Cryptomonadina.'] THE INFUSORIA. Ill 



27, and 28, are representations of this creature magnified. 

 Found amongst conferva. Size 1 -1200th. 



Genus XIV. CBYPTOGLENA. The loricated Monads, 

 with an eye. This genus is distinctly characterized by the 

 species having an open lorica, of the form of a shield (scu- 

 tellum), but folded or rolled inwardly at the sides, and 

 without the projecting neck. The eye is perfectly evident, 

 and the small digestive cells appear to be covered with 

 green egg-like granules. In the species C. conica, traces 

 are seen in the centre of the body of a male generative 

 structure, in the form of two oval glandular substances, of 

 a greyish colour; in this species also a double filiform pro- 

 boscis is seen. Self-division has not been observed in 

 any of the genera, which are all of a green colour. 



64. CRYPTOGLENA conica. The cone-shaped Crypto- 

 ylena. Form conical, dilated and truncated at the anterior, 

 and furnished with two filiform proboscides, half the 

 length of the body; they are acutely attenuated towards 

 the posterior portion of the body. Colour a blueish-green, 

 Group 29 is a magnified representation of three creatures. 

 They are found in great numbers in butts of river water, 

 in company with the Cryptomonas glauca, from which 

 they are readily distinguished by their form, larger size, 

 and red eye. They move briskly in the direction of the 

 longitudinal axis of their bodies, but when obstructed, 

 they spring or leap out of their course. Size 1-1 100th. 



65. CRYPTOGLENA pigra. The slothful Cryptoglena. 

 Form oval, approaching to globular, and emarginate at the 

 anterior ; colour a beautiful green ; movement slow. Found 

 in water, when covered with ice. Size l-3000th. 



66. CRYPTOGLENA cosru/escens. The cerulian Cryp- 



