256 
we should still have to imagine a further amount of diffe- 
rentiation effected in the body-structure before a type would 
be produced similar to that now under consideration. Nay, 
if we could even conceive some fairy power able to effect both 
such imaginary alterations, there is no known Actinophrys, 
even so quasi-generically transformed, that would deceive 
any one who had seen our form as to its being exactly the. 
same species — that is, there is no Actinophrys that offers a 
basis for the fanciful manufacture which I have supposed of 
one and the same thing; for, even imagining it carried out, 
we should have but a pretence of a new and distinct 
Raphidiophrys — not anything to be mistaken for our 
Raphidioph rys viridis. But away with fancy. 
I have taken up this form next after the foregoing Acan- 
tliocystis, because by the possession of spicula, though hut 
of one kind, it seems, like it, very closely to approximate to 
the marine Radiolaria; like Acanthocystis, however, it wants 
any trace of a ‘ central capsule.’ If, indeed, it possessed 
that organ, I do not see any character which would exclude 
it from the marine genus Sphaerozoum (Meyen), Haeckel. 
In endeavouring to convey a general idea of our form 
(PI. XVI, fig. 2), for its exact generic and specific descrip- 
tion I shall, as before, defer to the end of my communication, 
it may, perhaps, be better that I proceed, as it were, from 
within outwards. 
In the first, place, then, we have a variable number, say 
from one to a dozen or more, of balls of pellucid sarcode 
matter, about -j-i-g- of an inch in diameter, of definite outline, 
not containing any nucleus (that I can detect), but each 
bearing just under the periphery a dense stratum of somewhat 
large chlorophyll-granules, leaving the centre of the globes 
free. These globular, definitely bounded masses of sarcode, 
each so enclosing its stratum of chlorophyll-granules, are (in 
the next place) surrounded by a common investment of a more 
cloudy, very pale, or slightly buff-coloured sarcode matter, 
and of a more changeable character. Occasionally one meets, 
but rarely, however, examples with but a single central globe, 
and, indeed, those with two or three only are uncommon ; 
some six or eight are more frequent, and such examples are 
quite large enough to be visible to the naked eye. One meets 
some sometimes of very considerable size with comparatively 
numerous globes. Proceeding outwards, we find that, im- 
mersed in this general sarcode envelope, are contained an 
immense number of very slender, hyaline, acicular, siliceous 
spicula, acute at each end. These are numerous beyond 
all computation, and so densely crowded that they do not 
