46 



BRITISH FRESHWATER HELIOZOA. 



Diameter of outer envelope 35 /x to 50 /^,, usually 

 between 40 ^ and 45 /JL ; length of pseudopodia equal 

 to about the diameter of the body. 



Habitat. Lakes, ponds and rivers ; also marine. 

 Rare. 



Distribution. - -ISL WALES. - - Capel Curio- (#. $. 

 West). 



FIG. 188. Lithocolla globosa. On the right, the nucleus, further 

 enlarged. (After Penard.) 



West gives 23 ^ as the diameter of the individual 

 observed by him and states that the sand grains com- 

 posing the envelope were small and compact, a descrip- 

 tion that might possibly indicate L. flavescens as having 

 been the species under observation ; the length of the 

 pseudopodia, 31/x, also gives support to this suppo- 

 sition. 



Schulze in his original illustration of L. globosa shows 

 the outer envelope composed entirely of coarse angular 

 sand grains. 



