258 



T. FUJ1TA. 



Chloromyxum, which however differs in structural details from any 

 hitherto known species of that genus. 



The sporoblasts in question are 

 colourless, transparent, and of an 

 approximately spherical shape, up 

 to 50 fi in greatest diamètre (see the 

 accompanying figure). They contain 

 I — 3 spores, each situated in a clear 

 space surrounded by a membran- 

 ous envelope, around which there is 

 some finely granular matter. The 

 spores, found either in the sporo- 

 blasts or free in the fluid contents 

 of the gall-bladder, are nearly 

 spherical but not quite, exhibiting, as they do, a somewhat angular 

 contour at the anterior pole. So that, the antero-posterior diamètre is 

 always a little prolonged over the transverse. The two diamètres in 

 most cases measure 16 ft and 10 p. respectively. The shell of the 

 spore is rather thick and is characterized by showing a number of 

 peculiarly arranged, low and narrow but well marked ridges on the 

 external surface. There exist in the first place, four or five circular 

 ridges which completely encircle the spore : they run nearly parallel 

 with one another and together occupy a broad zone that pass over 

 the anterior and posterior poles. In the next place, there are, in each 

 of the two lateral areas on both sides of the median circular zone 

 just indicated, four more ridges running meridionally and which, if 

 prolonged at their either end, would strike the first mentioned circular 

 ridges at some angles. As a matter of fact, however the four lateral 

 ridges form two pairs lying side by side, in each of which the two 

 ridges are joined together at both their ends and thus form a loop at 

 each end before reaching the median zone. So that, when a spore is 

 viewed from the side of its either pole, there are to be seen in the 



A sporoblast of Chloromyxum /toi con- 

 taining three spores. Greatly magnified. 



