Zool— Vol. I.] EISEN—PLASMOCYTES. 67 



FUSIFORM CORPUSCLES WITH PLASMOCYTOBLASTS — 21 TO 39. 



All are stained with toluidine, excepting fig. 36, which is stained with 

 Ehrlich-Biondi. In the following the plasmocytoblasts will be referred to 

 simply as pcb. 



21. The nucleus is rounded and in a fair state of preservation as regards 

 the outline. There is only one pcb. at the upper pole {a), showing the spheres 

 arranged as cones, one above the other. The smallest and lowest down is 

 the somosphere, in which are seen three dark separated centrosomes. All 

 the spheres, except the plasmosphere and hyalosphere, are stained violet, the 

 latter are blue or bluish. At the lower pole (6) is seen a crescent-shaped frag- 

 ment of granospheroplasm, also stained violet. The plasmosphere and hyalo- 

 sphere extend around the left side of the nucleus, but cannot be traced along 

 the entire right side. Oc. 3. 



22. The nucleus shows advanced degeneration; the plasmosphere and 

 hyalosphere extend all around. At the upper pole the archosome has ad- 

 vanced far upward into the crescent-shaped large granosphere. Here is seen 

 one centrosome. At the lower pole an indistinct archosome is visible. The 

 nucleus shows a distinct polarity, the pole being marked with a white spot. 

 Oc. 2. 



23. The nucleus shows a strong polarity. At the upper pole is a large 

 pcb. in which the granosphere is very narrow, stained violet. The whole 

 archosome is far advanced. The centrosphere is almost unstained. The 

 somosphere is large, with two distinct centrosomes. At the lower pole there 

 is a crescent-shaped granosphere without archosome. Oc. 2. 



24. The nucleus is in an advanced state of degeneration. A plasmocyte 

 is nearly ready to separate at the upper pole, having left a crescent-shaped 

 residue of granosphere. A similar crescent of granosphere is seen at the 

 lower pole, but without archosome. Oc. 2. 



25. The nucleus is in an advanced stage of disintegration. The upper 

 pole contains a pcb. which has changed into a plasmocyte which is almost 

 ready to separate. The lower part of the pcb. has not yet perfected the 

 outlines of the spheres. There is no residue of granosphere, and only one 

 archosome. At the lower pole there is no pcb. nor any residue of grano- 

 sphere. 



26. The nucleus is rounded and swollen, with indications of a strong 

 polarity. The upper pole contains one pcb. with distinct centrosomes and a 

 starlike centrosphere. Plasmosphere and hyalosphere indistinct. 



27. The nucleus is in fair state of preservation, showing a polarity. At 

 the upper pole is a very large pcb., with the archosome far advanced towards 

 the apex. The plasmosphere and hyalosphere are distinct all around the 

 corpuscle. Oc. 3. 



28. There are three archosomes in the pcb. at the upper pole, and one 

 indifferently developed pcb. at the lower pole. Oc. 2. 



29. There is a pcb. at each pole. The archosome is far advanced, and 

 the spheres are differentiated. Each archosome contains two centrosomes. 



30. Very similar to fig. 29, but the centrospheres are stained deep blue, 

 while in the former they were white. 



31. There is a pcb. at either pole. The archosome at the upper pole 



