ARCHER—ON RHIZOPODA. 285 
If, however, Greef’s interpretation be truly correct, then the nearest 
relationship of the genus would seemingly be to Clathrulina, which 
would differ by the very much larger ‘pores’ to the globular ‘“ skele- 
ton,’ and this being supported on a stipes, and in the absence of the 
‘*central capsule’ presented by Astrodisculus. 
But opposed to Greef’s opinion as to the nature of this outer region 
is the fact he mentions, that not only do the pseudopodia project through 
it into the water (which they might certainly do through extremely fine 
pores), but also that the large characteristic red granules (in A. ruber) 
can pass in and out along the pseudopodia with ease. Now, this being so, 
it is not readily to be seen how they could do so, unless considerably 
large ‘‘ pores” existed, which, if present, must readily be seen; but no 
one of his forms reveals such. May I then, as yet, venture to suppose 
that the outer region (as I certainly thought in the Irish form I have in 
my mind’s eye) is but a more dense and more hyaline sharply defined 
differentiated region of the sarcode body—more dense, I say, than the 
inner region, but not too dense to allow of the passage of not only the 
pseudopodia, but of the large granules at any given spot? 
Of the newly established genus Astrodisculus, Greef records the fol- 
lowing species ; no strict diagnosis of their characters is given, but I ven- 
ture to abbreviate his general account of them as follows :— 
A. mmutus (Greef).* 
Sarcode of inner body of a greyish-brown colour, enclosing several 
minute round bodies (central capsules) of same colour, but of a deeper 
tint. 
A. ruber (Greef ).t 
Sarcode of inner body coloured red by a number of granular red 
pigment corpuscles, and enclosing a sharply bounded central capsule, 
filled with a bright red, finely granular substance. 
A. flavescens (Greef).t 
Sarcode of inner body yellow, containing several brownish-red pig- 
ment 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. 
* Toe. cit., t. xxvii, fig. 30. 
+ Loc,.ctt., £. XXvii., figs 31. 
t Loe. cit., t. xxvii., figs. 32 and 32a. 
§ Loc. cit., t. xxvii, figs. 33 and 33a. 
