DESCRIPTION OF PLATES. Xxix 



(tl and e) Clubs with terminal offshoots resembling teleutospores. 

 (./) A club with developing daughter clubs on the left, and on the 



right a mature secondary club. 

 (//) A segmental club with lateral offshoots. 

 (A) Two clubs undergoing calcification. 



FK;. 2. A very remarkable stellate growth comprised of nine wedge-shaped 

 collections of clubs radiating from a mass of finely granular material, 

 x 500. 



FIG. 3. A rosette undergoing central calcification, and consisting in part of 

 extremely elongated clubs resembling paraphyses. Calcareous matter is 

 also being deposited in the club-shaped structures, x 500. 

 FIG. 4. Part of a rosette with continuation of the club-shaped bodies 

 into transversely segmented branching cells apparently representing short 

 hyphae. x 500. 



FIG. 5. A rosette from another section in which similar appearances are 

 observed as in Fig. 4. x 500. 



DESCRIPTION OF PLATE XIX. 



Pure-cultivations of Actinomyces. 



Following p. 438. 



These tubes were selected from a great number of cultivations 

 in which there were different appearances. In some instances the 

 growths had a faint tinge of pink. 



FIG. 1. Pure-cultivation on the surface of potato, showing a luxuriant 

 sulphur-yellow growth entirely composed of entangled masses of fila- 

 ments. After three months' growth. 



FIG. 2. Pure-culture from the same series, on glycerine-agar. In this case 

 the culture remained perfectly white. The jelly was coloured reddish- 

 brown. After fifteen months' growth. 



FIG. 3. Pure-culture on glycerine-agar in which the growth was dark- 

 brown, in parts black, and the jelly stained dark-brown. After nearly 

 two years' growth. 



DESCRIPTION OF PLATES XX. AND XXI. 



Actinomycosis Bovis. 



Following p. 440. 



PLATE XX. 



Fn;. 1. From a section of an actinomycofeic tongue stained by the triple 

 method (Ziehl-Neelsen, logwood and orange-rubin). In this section the 

 separate centres of growth are clearly shown. Each neoplasm consists of 

 a fungus system, im which the masses of the fungus, situated more or less 

 centrally, are surrounded with round cells, epithelioid cells, sometimes 

 giant cells, and lastly fibrous tissue forming a more or less distinct 

 capsule. In parts the fungi have fallen out of the section. x 50. 



FIG. 2. From a section of a "tubercular" nodule from the lungs of a 

 Norfolk heifer with pulmonary actinomycosis. The nodule is a multiple 

 growth surrounding a bronchus, and is enclosed by a capsule, in the 



