No. I.] SPERMATOGENESIS OF BATRACHOSEPS. 1 05 



offshoot of the upper one. Alveoles are being formed in the plasmosphere 

 probably by secretion of interalveolar and metaplasmic matter. 



Fig. 34. Auxocyte in the angular spireme stage. The separated segments 

 have first contracted and then straightened out, having been angularly bent at 

 the nodes, and the chromomeres have so approached that they are hardly to be 

 distinguished from each other. Several chromoplasts are seen attached to the 

 segments at the nodes, where they are joined together. Some chromioles are 

 distinct in the segments. The granosphere is strongly stained and is seen to 

 consist of one row of alveoles and several central ones. The plasmosphere and 

 part of the cytoplasm are alveolate with distinct granules. A large archosome 

 in the granosphere and an accessory archosome in the plasmosphere. There 

 are no linoplasts left in the cell. 



Fig. 35. Auxocyte in bretzel stage, the chromosomes having the form of 

 bretzels and rings. Only a few of the chromosomes are figured. The cytoplasm 

 is alveolate with distinct granules. The granosphere is cone-shaped, with the 

 denser part cup-shaped as usual. Near the apex of the cone lies the archosome 

 with at least two centrioles. An accessory archosome at the upper left end of the 

 granosphere. 



Fig. 36. Auxocyte in bretzel stage. Only a few of the chromosomes have 

 been figured; one of them has been cut by the knife. The linin has separated 

 from the chromosomes, and scattered to the opposite part of the nucleus. The 

 cup-shaped granosphere is turned sideways, and appears as a crescent with one 

 row of alveoles. The cone-like structure belongs probably exclusively to the 

 granosphere. At its apex lies the archosome with two centrioles. Four separate 

 accessory archosomes in the plasmosphere, the latter being strongly alveolated. 



Fig. 37. Auxocyte in bretzel stage. Only a few of the chromosomes are in 

 the field. Several of them are connected in pairs with chromoplasts. One of 

 the ring-like chromosomes is free. Several chromosomes show distinct chromi- 

 oles. The linin network is scattered and not any more connected \vith the 

 chromosomes. The plasmosphere is in dissolution ; the granosphere is elongated. 

 At the apex of the latter is situated the archosome, which appears to have been 

 divided preparatory to the radiosomic process. The somospheres connected by a 

 thin ring ; there are three accessory archosomes. 



Fig. 38. Auxocyte in bretzel stage. The section is cut so that only the cyto- 

 plasmic pole is seen. The archosome has left the granosphere and become 

 divided. A small spindle is formed between the somospheres. The centrosphere 

 is elongated ; from its outer margin radiate numerous mantle fibers. The plas- 

 mosphere is greatly shattered, and the granosphere is only partly connected with 

 the mantle fibers. There are numerous accessory archosomes both in the cyto- 

 plasm and in the spheres. At the upper right-hand corner are seen the remains of 

 a spindle bridge. 



Fig. 38^. Auxocyte in bretzel stage. Most of the chromosomes are halved 

 by the knife. The linin network is scattered and retracted from the chromo- 

 somes. The nuclear membrane is yet intact. The archosome is entirely divided 

 and a small central spindle has formed outside of the granosphere. The latter is 

 being used up as material by the fibers. The centrosphere is stained, and the 

 various fibers are seen to emanate from its outer margin. The plasmosphere is 

 scattered, and parts of it are seen in the cytoplasm. Three groups of accessory 

 archosomes, some with three and four centrioles. 



