ARCHER—ON RHIZOPODA. 287 
Wales. ButI am greatly disposed to think its distribution is pretty wide, 
though always scanty, and restricted to isolated spots. I had myself ven- 
tured to draw attention to it and to describe it at a meeting of the Na- 
tural History Society of Dublin, and that before Cienkowski’s paper was 
published; but as he brought it forward far more elaborately than I 
could have hoped to have done, and as my paper could not have been 
put into type before the Part of the ‘‘“ Archiv” containing his paper 
appeared, I gladly waived my nomenclature, and withdrew my paper 
from publication. Greef is, indeed, quite right that I had the priority 
of publication, and that the form brought forward by me before our 
Microscopical Club was indeed truly one and the same thing as Cien- 
kowski’s. On the first occasion, indeed, I overlooked the stipes, or 
rather did not, indeed, fail to see, but misunderstood it, conceiving it to 
be some foreign filament; but a further examination of the specimens 
at command soon revealed the novel fact that we had indeed to do with 
a truly stepitate (all but Radiolarian) Rhizopod, and this error or over- 
sight I was able to correct at the subsequent meeting. 
The genus in question may be, I think, characterized as follows :— 
; Genus, Clathrulina (Cienk.). 
An ‘ Actinophryan” Rhizopod, without a ‘ central capsule,’’ and 
enclosed within a hollow, globular, fenestrate siliceous ‘shell’ (or 
‘“skeleton’’), the pseudopodia radiating all around through its apertures, 
and which is borne aloft at the summit of a slender stipes, the latter 
attached by a somewhat expanded base to foreign objects, or one to ano- 
ther. 
Clathrulina elegans (Cienk.). 
Specific Characters.—Body colourless, granular, vacuolar, very mobile, 
in a young state showing a pale central ‘‘ nuclear’ structure; the per- 
forate ‘‘ shell,’ when young, pale and colourless, when older more or less 
brownish; the apertures roundish or subpolygonal, bounded by a kind 
of raised rim, thus producing a groove or furrow, varying in width, be- 
tween them; the stipes in length two to six times the diameter of the 
‘* shell,” colourless; the pseudopodia numerous, fine, often long, colour- 
less, granuliferous, slightly branching. 
Reproduction of two kinds—(1) by self-fission into two, and even- 
tual passage forth through the apertures of the shell of the individualized 
sarcode bodies, which presently assume the inherent Actinophryan cha- 
racteristics, reproducing the Clathrulina by development of stipes and 
shell; (2) by formation of motile (ciliated ?) embryos, originating from 
a separately encysted condition within the “shell” of the sarcode body, 
mostly previously subdivided into several portions, each enclosed by a 
firm coat. These, after a period of rest (often long), permit the 
escape each of a motile monad-like embryo, showing a nucleus and 
nucleolus, which after a brief period passes out through an aperture of 
the shell, and settles near at hand (not unfrequently upon the just 
quitted primary Clathrulina), and (like the individualized portion of a 
