The anatomical record . sents type. body becomes larger and larger with the advancing stages of theinsect; ajiparently correlating \\ith this, the occurrence ofnuclear division is seen more and more freciuently, and finally,in old larvae, we find the condition as shown in figure S to bemet with very commonly. Sunmiarizing the facts, we may say that, in the adijiose cell,the luicleus continues to divide amitotically from early in .stage, and the cell stores up albuminous gramiles in itscell-body, commencing the process late in the thinl stage. This 84 WAIUJ .
The anatomical record . sents type. body becomes larger and larger with the advancing stages of theinsect; ajiparently correlating \\ith this, the occurrence ofnuclear division is seen more and more freciuently, and finally,in old larvae, we find the condition as shown in figure S to bemet with very commonly. Sunmiarizing the facts, we may say that, in the adijiose cell,the luicleus continues to divide amitotically from early in .stage, and the cell stores up albuminous gramiles in itscell-body, commencing the process late in the thinl stage. This 84 WAIUJ . shows tliat the foll-miclci which have undorgoiip amitotic di-vision, without lOKaril to wlicthcr tho cells rcinaiii nmhimiclcatoor not, do not degenerate, and theceils proceed witii their activefunctional processes. This can he more strongly emphasizedbecause we now see the fact that nuclei themselves take a directpart in the formation of alhumiiious granules, giving mostconclusive evidence in support of the Fig. 8 A multinurleatc adipose cell from iin old liirva, contnining iillitiiiiinousgranules in its cell-body. X 250. It has been supposed bj^ some writers that albuminous gran-ules are derived from the blood. HoUandes (14) recent the cliemical viewpoint, casts grave doubt on this assump-tion, and although lie has given no evidence, he has suggestedthat the granules may be of nuclear origin. It seems quiteprobable, from a cytological point of view, that such might reallybe the case, and especially so when we recall the fact that, inthe of .silk gland cells of Pieris and Xeuronia at lea-st, thenucleoli, after eliminating their phosphorus, change into albu-minous graiuiles and then extrude bodily out of the nucleus(.Nakahara, 17;. NtrCLEAR DIVISION IN ADIPOSE CELLS 85 Examining the nuclei of such cells as contain the granules,one can distinguish three different kinds of granules within of the three kinds undouhtedly represents chromatin an
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectanatomy, bookyear1906
