38 ARKIV FÖR BOT-A NIK. BAND 12. N:0 9. 



Fig. 21. Big nucleus from a later amoeba-generation, apparently 



showing chromosomes. (See also tig. 19.) 

 * 22 — 29. A series of nuclei at different stages of division. In 



25 the connecting membrane (as in fig. 18) can be seen. 

 » 30. Two daughter-nuclei (from a later division) showing a sort 



of centrodesmose. 

 » 31 — 39. Chromatical phase of the fungus' life-cyclus. 

 » 31 — 35. The chromatin leaving the caryosome going to the 



periphery. 

 » 36 — 37. The chromatin probably going partly out in the sur- 

 rounding protoplasm. »Garlands» are seen at the two poles. 



These are connected with strings. 

 » 38 — 39. The chromatin going to form a central plate for the 



following division. 

 » 40 — 41. Spore-mother-cells. Side- and vertical view of the 



metakinetic plate from the first sporogonic division. 

 » 42 and 44 (plate IIT. Later stage of the same division. 



Plate 3. 



Fig. 43 — 63. Sorodiscus Ca??ifric/;?s, sporogonic phase of the life-cyclus. 



» 64. Callitriche aiitumnalis. 



» 65 — 70. Sorosphaera Veronicce Schroet. 



» 71 — 78. Tetramyxa parasitica Goeb. 



A nucleus showing the metakinetic chromatin-plate in the 

 intranuclear spindle. 



An anaphase from the first division. 



Reconstruction of the nuclei. 



Nucleus from the second division, metakinese. 



All the nuclei dividing simultaneously; second division. 



Later stage. — Zeiss hom. Imm. 2 mm., Komp.-oc. 18. 



Plasms with two nuclei, resulting from the last division. — 

 Zeiss hom. Imm. 2 mm.. Komp.-oc. 18. 



52. Stage between 50 and 51. Reconstruction of the daughter- 

 nuclei. — Zeiss hom. Imm. 2 mm., Komp.-oc. 18. 



53. Uni-nucleate small plasms (young spores), the binucleate 

 plasms (in fig. 51) having been divided into two. — Zeiss 

 hom. Imm. 2 mm., Komp.-oc. 18. 



54. The young spores and their nuclei are increased and are 

 forming a spore-cake. 



55 — 56. More advanced stages. The nuclei are very large. 



57. Formation of a wall around the spores. The nuclei getting 

 smaller. 



58 — 59. Young spores. The polar radiation may be seen. 



60. A spore at the maturity. Tiie wall has been differentiated 

 into two layers, the outer one merges into that of the neigh- 

 bouring spores. 



