of England and India. 25 
charged with the “ granuliferous cells” and the nucleus empty, 
as in the colourless specimens of D. pyriformis, although, as above 
mentioned, these cells have sometimes been seen to have arrived 
at the granuliferous stage in the nucleus. Then I have not found 
any indication here to direct me to this condition, as in D. pyri- 
Sormis, where the absence of the green colour at once shows that 
the spherules of the nucleus have passed into the body of the 
animal. Probably it does take place here as well as in D. pyri- 
formis ; but this remains to be seen. 
Still it 1s perhaps worth recording that in one specimen an 
abortive nucleus was found, in which there were not only a few 
of the spherules remaining, but starch-granules and yellow oil- 
globules also, such as occur in the body of the animal, showing 
that where the development of the spherules fails of its object, 
the elements of which they are composed may pass into other 
compounds. On the application of iodine to this nucleus, the 
remaining spherules assumed their usual amber tint, the starch- 
granules a deep claret one, and the yellow oil-globules lost their 
colour, as in the body of the animal under similar circumstances; 
while the contents of the nucleolus, which were homogeneous, 
also (as usual) received a claret tint which, although not so 
deep as that of the starch-granules, yet always, in this respect, 
indicates in these contents a more amylaceous composition than 
in those of the nuclear cavity. 
Of what import are the “reproductive cells” of D. compressa, 
which appear to be homologous with those described in Amaba 
princeps? 
It may be seen that, while I have described and figured 
certain granuliferous cells, &c., which occasionally accompany 
the reproductive cells in Ameba princeps, still I could never 
recognize in any of these a true nucleus (J. c. p. 42, pl. 3. 
fig. 1 d,e). But I have done so in D. compressa, and, as above 
stated, have seen the reproductive cells in company with a sphe- 
ruliferous nucleus. However, I have observed and figured 
in Ameba princeps (fig. 5, l.c.) one of the reproductive cells 
twice the size of the others, which J have also interpreted as a 
yet undivided reproductive cell. On the other hand, Dr. Wallich 
(if we both refer to the same kind of bodies) states (Annals, 
ser. 3. vol. xi. p. 124) that he has seen, in his A. villosa, a nucleus 
among them; and, where these cells have been less numerous, 
“three distinct nuclei,” of almost equal size. The latter, I 
think, must be what I have considered undivided reproductive 
cells—that is, under the view that these cells are multiplied by 
duplicative division, which, in the large ones mentioned, is a 
little retarded. But be that as it may, we have in D. compressa 
_the spheruliferous nucleus and these reproductive cells together 
