OBSEEVATIONS ON VARIOUS SPOEOZOA. 289 



matic granules are arranged in lines {b) which radiate out into 

 the substance of the parasite, in the body of which numerous 

 similar granules can be seen, and they are often joined together 

 by achromatic filaments. Besides these granules numerous 

 typical spindles (c) and nuclei are to be seen, placed for the 

 most part at the periphery of each part of the syzygium. I 

 regard the granules as a phase of mitosis, and the purple 

 granules of the nuclear bodies as chromatin in a modification 

 previous to that in which karyokiuetic activity begins. Wolters 

 seems at one time to have held a similar opinion to mine in 

 reference to the radiating strings of granules, and to have relin- 

 quished it, I think, on insuflScient grounds. " Um diese 

 Spindeln sah ich bei praparaten welche durch Flemmingsche 

 losung abgetodte waren, viele stark farbeude Kornchen in der 

 Substauz vertheilt, ebenso hier und da, auch weit ab von deu 

 Spindeln, in den Syzygiten. Ich war geneigt dieselben als 

 chromatische Substanz anzusprechen. Spatere Untersuchun- 

 gen an Hoden, die ich mit Umgehung dieser Losung abtodtete 

 und hartete, zeigten nichts davon, sodass ich von meiner 

 ansicht zuriick gekommen bin, ohne eine befriedigende Erk- 

 larung dieser Kornchen gebeu zu kounen." In a second 

 drawing, PI. 31, fig. 2, of part of the periphery of another 

 couple of M. agilis I have represented some of these 

 granules (a) on a larger scale. In this case some of the deep 

 blue granules were surrounded by material which was coloured 

 by the eosin of the stain. On comparing these with the sporo- 

 gonia (c) lying at the periphery a close similarity of struc- 

 ture was observed, the body of the sporogonium staining in 

 the same tone with eosin as the material investing the chro- 

 matic granules. The nuclei of the sporogonia all stained 

 of the same deep blue as the granules, and they presented a 

 great variety of form. In some mitotic processes seemed to 

 have begun, and the same holds good for the sporogonia of 

 Mon. magna, as is shown at {b) in the lower of the two in 

 fig. 3. I am able to confirm Wolters's description of the forma- 

 tion of sporocysts and spores. Whilst speaking of sporocysts I 

 may mention that I have encountered in the seminal vesicles 



