26 BRITISH FRESHWATER HEr.IOZOA. 



1. Astrodisculus radians G-reeff. 

 (Text-fig. 183.) 



Astrodiscuhis radians 



Geebit Arch. mikr. Anat. V, 1869, p. 500, pi. xxvii, ff. 36, 36a. 



Pbnakd Heliozoaires, 1904, p. 140, fig. 

 A. i-uher 



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

 A. flavescens 



G-RBEFP T.c. p. 499, pi. xxvii, fp. 32, 32a. 

 A. ilavo-capsulatws 



GEEErr T.c. p. 499, pi. xxvii, fE. 33, 33a. 

 Heliosphserium aster 



Feenzbl Bibl. Zool. IV, 1892, p. 76, pi. vi, S. 10, 11, pi. x, f. 4. 

 H. polyedricum 



Feenzel T.c. p. 79, pi. vi, fE. 6, 9, 17, pi. x, f. 5. 

 Heliophrys varians 



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



Fia. 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 



