FLAGELLATE IXFUSORIA. 



373 



fast line where the animal and vegetable kingdoms branch off. Saville Kent has paid much attention 

 to the order, anil his descriptions and classification are excellent. 



The Flagellata may be divided into three sub-orders : in the first there is no denned mouth, 

 and the food may be taken in by any part of the body, and in the second the food is received in the 



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Fig. 36. A, CLADONEMA LAXA. (After Savllle Kent.) B, ANIMALCULE DIVIDING ; C, ANTHOPHY8A VEGETANS, SWIMMING 



CLUSTER; D, ANTHOPHYSA VEGETANS, SHORT BRANCHING COLONY; E, SPOROCYST LIBERATING OEBMS. 



anterior region. A true opening for food exists in the third, which have a non-ciliated body with 



a flagellum. The sections of the first sub-order are the Trypanosomata, membranous organisms found 



in the blood of frogs and toads ; the Rhizo- 



flagellata, which have aincebiforni bodies and 



a flagellum ; the Radio-flagellata, with or 



without a lorica, having a flagellum, and 



ray -like pseudopodia ; and the Flagellata- 



Pantostomata proper, which have a flagellum 



and the food incepted anywhere. A host of 



genera belong to this sub-order and Monas 



may be represented by 



Jfonas dallingeri, ^jVoth of an inch 

 in length. It has one flagellum, which is 

 flexible when young, and rigid towards the 

 base in old specimens (Fig. 35). 



C'ercomonas has a caudal filament besides 

 a flagellum (Cercomonas typica, Fig. 3). 



The genus Cladonema, as the name im- 

 plies, has a branching form, and the ovate 

 bodies are attached to thread-like pedicles. 

 Tla ere are two flagella (Fig. 36, A, B). 



Anthophysa, a genus belonging to the 

 same family, has small individuals -g-gV^th 

 to ^-y^ir^h of an inch in length, and is in the 

 form of clusters of fifty or sixty bodies at 

 the ends of branching horny pedicles. These 

 have contractile vesicles (Fig. 36, c, D). 



Rkipidodendron splendidum (Fig. 37) 

 is in masses, y^th of an inch long, and has 

 its bodies with two flagella. These are in a F - g 37 ._ RHIPIDODEXDIl oN SPLEXDIDUM. 



branching mass, like a fan in shape. A, Colony; B, animalcule bifurcating ; c, isolated monad. 



