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 granuhferous stage in the nucleus. Then I have not found 

 any indication here to direct me to this condition, as in D.pyri- 

 formis, 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 is 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. cumpressa, 

 which appear to be homologous with those described in Amoeba 

 princeps ? 



It may be seen that, while I have described and figured 

 certain granuliferous cells, &c., which occasionally accompany 

 the reproductive cells in Amoeba princeps, still I could never 

 recognize in any of these a true nucleus (/. c. p. 42, pi. 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 Amoeba princeps (fig. 5, /. c.) one of the reproductive cells 

 twice the size of the others, which I 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. xii. 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 spheruliferouB nucleus and these reproductive cells together 



