349] STUDIES ON MYXOSPORIDIA—KUDO 111 



Spore: Irregular fusiform, greatly enlarged at the middle portion. 

 Plane of symmetry of the spore coincides with the sutural plane. Shell 

 thick with 9 to 11 longitudinal striations on each valve, which are more 

 clearly seen on spores stained with iron hematoxylin. Polar capsule at 

 each end. Coiled polar filament distinct. Sporoplasm finely granular 

 with two nuclei and refringent globules. Dimensions in vivo: length 9 to 

 lO^t, width 5 to 5.6/1, thickness 4.75 to 5/x, polar capsules 3. 5m by 2ju. 



MYXIDIUM PFEIFFERI Auerbach 



[Figs. 262 to 265] 



1908 Myxidium pfeiferi Auerbach 1908 : 459-464 



1910 Myxidium pfeiferi Auerbach 1910c : 171-172 



Habitat: Gall-bladder of Tinea vulgaris Cuv.; Karlsruhe. 



Vegetative form: Observations in sections. More or less flattened, 

 disc-form, often enrolled. The ectoplasm finely granular, without large 

 pseudopodia. It is not usually distinguishable from the endoplasm which 

 is highly alveolar and contains numerous nuclei, but no enclosures. 



Spore: Form varies to some extent. Similar to Myxidium lieberkiihni; 

 slightly curved. Shell with fine longitudinal striations. Polar capsules 

 two, one at each end. Polar filament is extruded by adding one drop of 

 water to the smear of the spore, which had been dessicated for 24 hours. 

 Sporoplasm with one or two nuclei, in one case with four small nuclei, 

 which is thought to be an abnormal. Dimensions: length 13 to IS^i, 

 breadth 5.2 to 5.8/x, length of polar capsule 5.2 to 6/i, length of polar fila- 

 ment 45 to 54/i. 



MYXIDIUM INFLATUM Auerbach 

 [Fig. 266] 



Habitat: Gall-bladder of Cydopterus lumpus L.; Bergen (September). 



Vegetative form: Extremely polymorphous. Rounded, spherical, 

 or much elongated. Ameboid movements very active. Differentiation of 

 protoplasm is sharp and clear, which is best observed in individuals in 

 motion; highly hyaline ectoplasm forms very long lobose pseudopodia, 

 into which granular endoplasm flows in slowly. Size variable. Rounded 

 large form 44 to 45/i in diameter. Fully grown spores are set free from the 

 mother trophozoite in comparatively short time. Spore formation similar 

 to that of Myxidium bergense. Disporous and polysporous (5 spores in 

 maximum). 



