loo W. G. RIDEWOOD AND II. Tl. FAIsTlIAM. 



defined capsule {cps.), soinewliat alveolar in character, and apparently formed 

 by degenerating host tissue; it lies in a cavity in the host tissue, which 

 latter is lined by a membrane {cps'.). 



Fig. 13. — Typical capsule, full of spore-morulae, each dividing into many 

 spores. 



Fig. 14. — Part of a capsule containing spore-morulse, one of which, having 

 shod its spores, shows a residual granular mass of cytoplasm, and a pale, ill- 

 defined nucleus. The difference in the staining reaction of this remnant of the 

 spore-morula from that of its sporulating neighbours is very striking. 



Fig. 15. — Capsule containing residua of spore-morulae. Groups of nuclear 

 granules (chromidia), some of which may perhajis form spores, while others 

 will degenerate, are scattered about, chiefly in ihe centre. These chromatic 

 dots are smaller than the daughter-nuclei shown in fig. 13, each of which 

 latter becomes the nucleus of a spore. Some of these smaller nuclei {chr.) 

 are surrounded by a layer of clear, refractive protoplasm. 



Fig. 16. — Further stage in degeneration of residua of spore-morulse. 

 These consist, at this stage, chiefly of residual granular protoplasm, which is 

 becoming vacuolated. At the periphery of the cavity, now ill-defined, in 

 which the large mass lies, are seen some of the spores and young trophozoites 

 formed from these spore-morulse. x 500. 



Fig. 17. — Still further degeneration of residual matter of the spore- 

 morulse, showing vacuolated protoplasm and remains of nuclei {r.n.) of some 

 of the spore-morulw. Some chromidia are grouped in the centre, but these 

 were probably not destined to form spores. 



