HARDWICKE'S SCIENCE-GOSSIP. 



flagellum it has a long trailing filament which can be 

 retracted into its interior. By this organ, and by its 

 slow gliding movement, it can be readily recognised. 

 Granules can be seen in its clear protoplasm as well 

 as a contractile space, placed posteriorly, and the 

 Diatoms it has swallowed as food. 



Codosiga and Pinobryon ; in the former, Uvella and 

 Anthophysa. 



io. Uvella (Fig. 54 c, d, c) is free swimming. I 

 have found quantities of it in water where flowers 

 had been left standing a long time. In all probability 

 the spores were on the flower-stalks and had developed 



CBHTIUL BCDY ,i ' !\ ' fl 



Fig. 52. — A, Euglena viridis extended, showing flagellum, red spot, chlorophyll, central body ; B, Eugtena viridis^ contracted ; 

 c, Euglena viridis filled with granules ; d, Eugletta longicauda ; E, Euglena pyrum ; F, Euglena-like organism. 



Fig. 53.— /Viaotf pleuronotes, front view ; B, Pliacus pleuronotes, empty case ; c, Phacus pleuronotes, side view ; r>, Doxococcus 

 ruber; e, Doxococcus, crushed; F, Chatoglena volvocinea with spines; G, Oustogima without spines. In neither of these 

 is the flagellum represented. (See last Number.) 



We now pass to those members of this family which 

 are found in groups or colonies, and although these 

 are clustered together they have no organic connection. 



Among these there may be mentioned those whose 

 protoplasm is naked, and those which are furnished 

 with a case or cell-wall. In the latter we have 



in the water. Little transparent masses, resembling 

 bunches of grapes, were seen actively moving among 

 Bacteria and Amcebse, with which the water was 

 crowded. Each mass is composed of little oval in- 

 fusorians or zobids, sometimes of only a few, often of 

 very many. 



