NEBELA BIPES. 99 



emitted anteriorly in obtuse pseudopodial prolonga- 

 tions for progression and the capture of food ; ventral 

 portion more or less charged with fragments of algee 

 and oil-globules ; posterior extremity containing a large 

 nucleus and nucleolus, several reproductive (?) cells, 

 and one or more contractile vesicles. Body tied by 

 three sarcodal fragments to the posterior part of the 

 test and to the extremities of the hollow, conical, leg- 

 like appendages respectively. Molestation causing 

 the body to assume a spherical form, synchronously 

 with which it is suddenly retracted by the sarcodal 

 filaments to the posterior end of the test. 



87 89 ■ 88 



Figs. 87-89. — " Difflugia bipes " Carter : 87, broad view of test ; 88, 

 narrow view ; 89, the living animal. The circle in fig. 87 shows the 

 position of the animal when withdrawn into its test, x 250. 



Dimensions : Length about 140 jx ; breadth 72 /a 

 (; width of aperture 35 ^u.). 



Freshwater pool in heath-bog, living on minute algge 

 (Oscillaria, etc.), progressing after the manner of 

 Diffltogias generally, with the test vertical and the 

 fundus uppermost; Budleigh-Salterton, Devon, 1869 

 (H. J. Garter). Also in Loch Ness, Scotland, 1903 or 

 1904 (James Murray). 



Carter states that the colour of the test was light 

 yellow, and that he found three or four specimens in 

 the surface-pool of a heath-bog about a mile from 

 Budleigh-Salterton. It would be strange if several 



