No. I.] SPERMATOGENESIS OF BATRACHOSEPS. 8 1 



cytofoam, but rather the result of a real readjustment of the indi- 

 vidual granules of the protoplasm (Figs. 62, 65). The beaded 

 nature of the spindle fibers is probably due to the alternating 

 of larger and smaller granules, as well as to the accumulation 

 of several granules into larger heaps. The nodes of granules 

 can thus be considered as storehouses of protoplasmic granules, 

 which at any certain time may be given out at any particular 

 point, or at all points at the same time, as the necessity either 

 to contract or to expand may require. 



In this connection it may be proper to tf""^*! 

 consider the nature of the individual cyto- 

 plasmic granule and the manner by which 

 it is able to adhere to other granules of 

 the same nature. In the linin, as well as 

 in the purely cytoplasmic network, the 

 individual granules are either situated very 

 close together or they are farther apart a dia|rammatic representation 



° •' -^ or the structure of hnosomes 



and only connected with each other by fine and the unopiast. The indi- 

 vidual linin granules are con- 



threads. The diagram illustrates the man- nected by means of iino- 



r •,-, • r^iT- 1 T- podia. The linoplast contains 



ner of adhesion of the linm granules. Every unosomes as weii as an en- 

 individual granule appears to have the prop- '^on^cieoiar body. 

 erty of sending out one or more of a kind of long pseudopodia, 

 for which I propose the name liiiopodia. They differ from the 

 pseudopodia of the amoeba by being always and throughout their 

 length regular and even, resembling fine threads projecting 

 from one granule to the other. Some granules have one or 

 more of these linopodia which do not connect with any other 

 granules, — which seems to show that the individual linopodium 

 has actually been thrown out, and that it has not been drawn 

 out through the moving apart of two or more granules from 

 each other. By the aid of these linopodia the granules can 

 adhere to each other, and can be drawn closer together or be 

 moved farther apart as the case may require. When alveoles 

 are to be formed, as, for instance, in the granosphere, then the 

 linopodia are drawn in and the granules are drawn close together, 

 thus enabling secretions to be retained in the alveole. A net- 

 work again is formed by the moving apart of the granules and 

 by an extension of the linopodia (Diagram, p. jZ). 



