THREAD-LIKE PSEUDOPODIA 99 



to be visible as lines. No distinct meshwork structure is 

 to be found in these pseudopodia, but there occur, on the 

 other hand, at moderate, though, during life of course, always 

 at variable, intervals, darker points, like faint nodules, which 

 by their displacement along the pseudopodium are an 

 index of the streaming movements. In their company are 

 others which are certainly granules, as has been already 

 mentioned ; by the intense coloration which they assume in 

 haematoxylin they are proved without doubt to be special 

 structures. The question is whether the first-mentioned 

 nodule-like points are also granules of smaller size, or whether 

 they correspond in some way to the nodal points of the 

 meshwork. I was not able to answer this question with 

 certainty. The majority of the nodal points in the fine 

 pseudopodia are very similar to the nodal points of the mesh- 

 work. It might be imagined that a fine pseudopodium of 

 this kind is to be regarded as a row of elongated meshes of 

 the protoplasmic framework, and the nodal points as the par- 

 titions of the consecutive meshes. This idea seems, however, 

 scarcely permissible, since, in the preparations at least, the 

 points in the fine pseudopodia follow one another at inter- 

 vals, which correspond roughly to the usual breadth of the 

 meshes (Plate III. Figs. 1 and 2, Plate IV. Fig. 2). More- 

 over, other very peculiar phenomena can be observed in the 

 fine pseudopodia. Among them seems to me specially 

 important and noteworthy the not infrequent impression of 

 having observed that one or another of the granules, which 

 rush along the pseudopodium, travels away from it for a 

 short distance, and then fuses with it again. It strikes 

 me that I have frequently observed granules, which were 

 rushing along the threads, seated upon small and very 

 pale projections of greater or less height, elevated- some 

 distance above the threads, an observation which would 

 explain the fact that the granules can apparently leave the 

 threads. Moreover, at times pale vesicular structures were 

 observed, which rushed along the threads (Plate III. Fig. 1), 

 and near them small aggregations of protoplasm, consisting 

 of only a few meshes. Also by careful study of my best 

 preparations (Plate IV. Fig. 2) I could to some extent make 



