115 



closing several minute round bodies (central capsules) of 

 same colour, but of a deeper tint. 



A. ruber (Greef).^ 



Sarcode of inner body coloured red by a number of granu- 

 lar red pigment corpuscles, and enclosing a sharjdy bounded 

 central capsule, filled with a bright red, finely granular 

 substance. 



A. flavescens (Greef).^ 



Sarcode of inner body yellow, containing several brownish- 

 red pigment granules, and enclosing a central capsule filled 

 with a yellow, finely granular substance. 



A. flavocapsulatus (Greef).^ 



Sarcode of inner body colourless, showing a number of 

 pale, circular, dot-like granules, and enclosing a central 

 capsule filled with yellow, finely granular substance. 



As regards this sj^ecies Greef suggests that the round dots 

 seemingly in the extra-capsular region may actually be the 

 superficially posed discoid bases of exceedingly fine and deli- 

 cate spicula, comparable to those of Acanthocystis, but in 

 the present instance he leaves this quite as matter of doubt. 

 I would venture to think that the placing side by side in one 

 genus of a spicule-bearing form with others destitute of spi- 

 cules would be incorrect. But he distinctly attributes 

 spicules to the last form he records under this genus, 

 namely : 



A. radians (Greef).* 



Sarcode inner body colourless, and enclosing several (two 

 to three) " central capsules," filled also with finely granular 

 colourless substance ; outer region of a slightly brownish hue, 

 and containing several acicular, very slender and delicate 

 radial spicula, reaching from the periphery of the inner body 

 to the outer surface. 



The presence of these spicula would, 1 venture to think, 

 place this form in a distinct genus, and, in fact, very close to 

 Acanthocystis. Indeed, I would almost query if the form 



^ Loc. cit., t. xxvii, fig. 31. 



- Loc. cit., t. xxvii, figs. 32 and 32*. 



^ Loc. cit., t. xxvii, figs. 33 and 33«. 



■* Loc. cit., t. xxvii, tigs. 3G and 36f/. 



