1902.] NATURAL SCIENCES OF PHILADELPHIA. 313 



iiitestiue of an aiiimal which had been starved eleven days and then 

 killed four hours after feeding (No. 7 of table). Besides the usual 

 alveolar structure and the interalveolar substance, are to be seen 

 definite aggregations of fine granules. These masses may be at 

 almost any position in the cell, though rarely at an extreme distance 

 from the nucleus. The cell on the extreme right of Fig. 10, B, 

 is cut just to one side of the nucleus and in a plane in which the 

 granular substance is specially aggregated — a very common 



.7 



/- 



■2\j>n .Gy v> 





Fig-'IO.— Sections X 270 from "mid-gut" of: A, Oniseus asellns, 16 

 hours after feeding with raw heef, fixed in Flemming's fluid ; B, Porcel- 

 lio scaber, 4 hours after feeding with raw beef, fixed in 1 percent, platinic 

 chloride 15 parts., 1 per cent, osmic acid 4 parts ; Zym. Or., zymogen 

 granules appearing about the nucleus. 



arrangenaent. Often the masses are in actual contact with the 

 nucleus. When the nuclei are broken or shrunken, granules indis- 

 tinguishable from these are found about the nucleus or opposite the 

 break. There seems good reason, therefore, to state that this sub- 

 stance is being given out by the nucleus. I cannot satisfy myself, 

 however, that the nuclear membrane disappears or that the nucleus 

 suffers any visible change in the process. Fig. 10, A (No, 20 of 

 table), shows aggregations which are decidedly more definite. Figs. 

 11, A and 5 (Nos. 8 and 21 of table),'" exhibit some variations in 

 the form of these masses. All the figures thus far referred to are 

 '"Tables I and II follow at end of paper. 



