. 
; : Description oF PLATE. 
b Fic. I,—Fresh specimen showing free amceboid bodies of various forms amongst ‘the corpuscles, . 
Leucocyte, containing refractory bodies, on the left. (x 1,000.) 
Fic. 11.—Pyrosoma bigeminum chiefly in the corpuscles, and some free ; towards lower part of 
+ Fig. deeply stained round leucocyte. 
Fic. IIL.—Crescentie bodies with large nucleus (?); also some infected corpuscles. Towards the 
right is a cluster of Pyrosoma in the form of a crescent. (Stained with gentian 
violet, x 1,000.) 
i Fie. [V.—Shows grouping of crescents, and deep eosin coloured points; also, some corpuscles 
q infected with Pyrosoma. (Stained with methyl blue and eosin, x 1,000.) 
; ‘Fic. V.—Crescents further developed ; ; some, still whole, containing young Pyrosoma ; others 
c rupturing and liberating those bodies ; others, grown more or less epheroidal, appear to. 
have lost the crescent envelope, and to consist only of the nuclens, round which some 
. young Pyrosoma are still clustered. (Stained with gentian violet, x 1,000.) 
Fie. VI.—To illustrate a case of mistaken identity. These bodies have nothing whatever to do 
with tick fever. They are spore cases of hyphomycetons fungus found growing on dead 
i ticks. Spermatia may be seen to have been thrown out by some of them, (Unstained, | 
7 x 1,000.) 
