14 Mr. W. Saville Kent on Prof. E. Haeckel’s 
this chamber, as also the single one of Haliphysema, he re- 
gards as a true mouth or oral aperture (“ Mundéffnung”’). 
Having further observed some peculiar pyriform bodies scat- 
tered among the ordinary flagellate cells that line the anterior 
chamber, he sees, or rather imagines he recognizes, in_ these, 
rudimentary glandular structures, or, to use bis own expres- 
sion, ‘ Driisenzellen.” From the figures of these so-called 
“ sland cells”? which accompany his description, however, it 
is very evident that we have here simply an “ encysted”’ 
condition of certain of the ordinary collar-bearing monads, 
already ascertained by me to occur among the ordinary 
sponges, and which in this instance, regarded separately, 
harmonizes remarkably with a similar encysted condition of the 
solitary Gymnozoidal species Salpingaca fusiformis, S. Kent, 
comparisons between which may be instituted in the illustra- 
tions that accompany my monograph of this group. 
Such being the wonderfully complex organism that Prof. 
Haeckel constructs out of this simple little two-chambered 
sponge, the mind trembles with awe at the thought of what he 
might have conjured out of the three-, four-, or five-chambered 
species, G'astrophysema scopula, Hkl., = Squamulina scopula, 
Carter, had he had an opportunity of examining that species 
in the flesh. As suggested elsewhere, with every additional 
chamber he would probably have discovered and associated 
some new sensory organ, until in the most complex type a 
perfect embodiment of the five primary senses might have 
been made manifest. Under existing circumstances, however, 
Prof. Haeckel is obliged to content himself with enumerating 
its external characters as given by Mr. Carter, and with taking 
that authority smartly to task for the interpretation he has 
given of the structure. Under any circumstances, the con- 
clusions arrived at by Mr. Carter concerning the true nature 
of this debatable organism are far more logical than his 
own, he (Mr. Carter) having, without doubt, referred the struc- 
ture to its right subkingdom, that of the Protozoa. That Mr. 
Carter, in witnessing the protrusion of the pseudopodia from 
the terminal orifice of the type in question, should have decided 
upon its foraminiferal nature is perfectly comprehensible. 
Even as a true sponge, agreeing in all structural details with 
the simple Haliphysemata here described, we should expect 
to find the sarcode or syncytial element protruded in such 
a fashion for the seizing of the fragmentary foreign particles 
out of which it builds up instead of secreting, as do ordinary 
sponges, a protective and supporting framework. If, on a 
closer investigation, Mr. Carter finds the internal cavity lined 
with the characteristic collar-bearing monads, it may be anti- 
