OF THE CRYPTOMONADINA. 



507 



monas and Cryptoglena, and other forms, have a hard integument or lorica 

 (Panzer) inseparable from the subjacent mass, whi[stTrachelomonas,Lagenella, 

 and Chcetoglena possess a distinct separable capsule or cyst, within which, at a 

 certain period, the contained Eiiglena-like being can contort itself and revolve 

 at pleasure. Moreover, Cohn's opinion is that these capsuled forms should 

 be detached from the Monadina or Cr^-ptomonadina, and placed with the 

 Euglenae. In this opinion we entirely coincide, and would regard the cap- 

 suled monadiform beings as simply encysted EugUnce. Indeed, the present 

 state of knowledge, especially respecting the process of encysting, irresistibly 

 leads to the conclusion that this entire family Cryptomonadina of Ehrenberg 

 must be broken up, and its several forms distributed among various groups of 

 animalcules and plants, as representing their encysted phase or condition. 



Fresenius adds a new genus to the Cryptomonadina, which he calls Dre- 

 jpanomonas. 



Genus CRYPTOMOjS'AS (XYIII. 29).— Coloiu^ed stigma absent; lorica 

 obtuse, or not attenuated anteriorly ; body short, but not filiform ; self-divi- 

 sion, if any, longitudinal ; llagelliform filament very fine. 



Dujardin writes, '' In this genus Crgptomomis 1 comprise all Thecamo- 

 nadina mth a single filament, and with a lorica neither hard nor brittle, and 

 whose body is not depressed (compressed) like that of Phacus or of Crum&nula ; 

 and I moreover do not doubt that when these Infusoria are better known, 

 other genera may be distinguished by their more or less globular form, by 

 the consistence of theii' envelope, and especially by their mode of existence. 

 I akeady indicate as subgenera, Lagenella with an elongated lorica, and 

 Tetrabcena, the species of which are united in groups of foiu", not enclosed, 

 however, within a common envelope. As to the character supplied by the 

 presence of a red speck in some individuals, assumed by Ehi^enberg to be an 

 eye, I cannot discover in it a generic distinction ; nor am I able to admit the 

 existence of a lorica open on one side (below) like a shield (carapace). On 

 the contrary, I have always observed the lorica to be closed and entire, 

 though sometimes compressed on one side, adapting itself to the living mass 

 enclosed. The covering in every case is evidently larger than the contained 

 mass, a diaphanous space intervening between the two visible in the form 

 of a clear ring." Of the species enumerated by Ehrenberg, Dujardin re- 

 marks that " C. curvata is so compressed that it is properly referable to our 

 genus Crumeiiula.^' C. glcmca and C. fusca he regards as doubtful species. 



Perty briefly characterizes his genus Cryptomonas thus : — " Body an elon- 

 gated urceolus, from the anterior and mostly-rounded extremity of which two 

 filaments are protruded, somewhat exceeding the length of the body ; within 

 are usually one or more dark nuclei, from which the vesicular germs seem to 

 be developed." 



Cryptomonas curvata. — Green, com- 

 pressed, slightly bent like the letter S, 

 and twice as long as broad. Amongst 

 Confervie. 1-570". 



C. ovata {Enchelys viridis, M.) (xvni. 

 29). — Green, depressed oval, and twice 

 as long as broad; motion slow, vacil- 

 lating, and rotating on the longitudinal 

 axis, but when obstructed (says Ehren- 

 berg) is seen to leap ; lorica paper-like, 

 not hard ; numerous internal transparent 



vacuoles and green granules. In the 

 middle of the creature there are two or 

 three egg-shaped nuclear bodies, and at 

 the posterior part a single vesicle : self- 

 division not observed. Found amongst 

 Confervas, 1-570". 



C. erosa. — Green, hyaline anteriorly, 

 depressed, oval. In clean water among 

 Conferv^e. 1-960". 



C. cylindnca (Enchelys viridis, M.). — 

 Elongated, subcylindrical, three times as 



