26 BRITISH FRESHWATER HELIOZOA. 



1. Astrodisculus radians Green . 

 (Text-fig. 183.) 



Astrodisculus radians 



GREEFF Arch. mikr. Anat. Y, 1869, p. 500, pi. xxvii, ff. 36, 36a. 



PENARD Heliozoaires, 19U4, p. 140, fig. 

 A. ntber 



GREEFF T.c. p. 497, pi. xxvii, f. 31. 

 A. ftavescens 



GREEFF T.c. p. 499, pi. xxvii, ff. 32, 32a. 

 A. flavo-capsulatuts 



GREEFF T.c. p. 499, pi. xxvii, ff. 33, 33a. 

 Heliosphseri'u n> after 



FRENZEL Bibl. Zool. IV, 1892, p. 76, pi. vi, ff. 10, 11, pi. x, . 4. 

 H. polyedricum 



FRENZEL T.c. p. 79, pi. vi, ff. 6, 9, 17, pi. x, f. 5. 

 Heliophrys variant 



WEST J. Linn. Soc. Zool. XXVIII, 1901, p. 336. 



FIG. 183. Astrodisculus radians. x 900. (After Penard.) 



Body spherical, with a thick, colourless, mucilaginous 

 investment without any inclusions, but its outer surface 

 often defined by extraneous particles and bacteria 



