Monadina.] THE INFUSORIA. 99 



we can only argue, as we have done already, that if there 

 be one, the vessels in beings so minute must necessarily 

 be of such delicate structure, that we may not as yet have 

 found out the means of making ourselves acquainted with 

 them. 



34. MICROGLENA punctlfera (Enchelys punctifera M.), 

 The yellow Microglena. Yellowish colour, form oval, or 

 almost conical, and terminated acutely at the posterior 

 extremity. Red eye, with a blackish central spot, as if a 

 secondary visual appendage. Found among slimy water 

 plants. Size 1 -620th. 



35. MICROGLENA monadina. The green Microglena. 

 Beautiful green-colour; form ovate, rounded equally at both 

 extremities ; a distinct single red eye, proboscis nearly as 

 long as its body, a vibrating rotatory motion on its long 

 axis. Figures 12, 13, and 14, represent three animalcules 

 magnified, the first 800 diameters, exhibiting all the internal 

 organization noted above. Found among slimy water-plants 

 (Hampstead and Finchley). Size l-2300th to l-720th. 



Genus V. PHACELOMONAS. The fan Monad. The dis- 

 tinguishing characters of this genus are the numerous pro- 

 boscides placed round the mouth of the creature, as it 

 were a wreath of cilia, composed of from 8 to 10. In 

 other respects it resembles the Microglena : it has the small 

 red eye, the truncated mouth at the anterior extremity, and 

 is deficient of the tail. It swims in the direction of the 

 longitudinal axis, and its self-division is either simple and 

 complete, or it never d ivides. Many stomach-cells have 

 been observed within the body, but they have not been 

 seen to admit artificial coloured food. This genus has not 

 been illustrated by Ehrenberg. 



H 2 



