353] STUDIES ON MYXOSPORIDIA—KUDO 115 



Spore: Form similar to Myxidium pfeiferi Auerbach, but rather 

 straight fusiform, rarely slightly bent. In many spores the shell tapers 

 to a sharp point at each end. Shell striated longitudinally, 22 in all 

 (2 sutural ridges?). Two polar capsules, one at each end. Sporoplasm 

 usually with two nuclei. Dimensions: length 9.1ai, breadth 2,8^, length 

 of polar capsule 3.5/x. 



MYXIDIUM sp. Mavor 

 [Figs. 285 and 286] 



1915 Myxidium sp. Mavor 1915 : 32 



Habitat: Gall-bladder of Pseudopleuronectes americanus ; New Bruns- 

 wick (Canada), of rare occurrence. 



Vegetative form: Observations in smears are as follows: Spheroidal, 

 with numerous long pseudopodia on one side, which suggests the attach- 

 ment of the trophozoite to the bladder. Trophozoites without any spore. 

 Pansporoblasts spherical, 15 to 16/i in diameter. 



Spore: Spindle shaped. The long axis being slighly bent in S-form. 

 Two pear shaped polar capsules, one at each end of spore. Coiled polar 

 filament visible in fresh state. Dimensions: length 14 to 15/x, breadth 

 6 to 7.5/i, polar capsules 4/i by 2.5/x, length of polar filament 90 to 95/i 

 (ammonia water). 



MYXIDIUM GADI Georgevitch 

 [Figs. 287 to 290] 



1916 Myxidium gadi Georg6vitch 1916 : 88-89 



1917 Myxidium gadi Georg6vitch 1917c : 797-799 

 1919 Myxidium gadi Georgevitch 1919 : 251-289 



Habitat: Gall-bladder of Gadus pollachius, Solea vulgaris Quens; 

 Roscoff (September). 



Vegetative form: Highly polymorphous. Spherical or oval. Large 

 forms fill up the bladder. Ectoplasm hyaline and transparent, forming 

 one long or many short lobose pseudopodia. Endoplasm colorless and 

 finely granular, contains more or less large numbers of nucleus. Mono- 

 sporous, disporous and polysporous. 



Spore: Fusiform with attenuated ends. Young spores more attenuated 

 than the fully grown forms. The main axis of the spore coincides with the 

 longitudinal axis of the polar capsules, with slight deviation. Two nuclei 

 of the sporoplasm, are always smaller than those of the shell-valves or 

 of polar capsules. Dimensions: length 6 (?) to 14jli, breadth 4 to 6ju. 



MYXIDIUM GLUTINOSUM Davis 

 [Fig. 291] 

 1917 Myxidium glutinosum Davis 1917 : 235 



Habitat: Gall-bladder of Cynoscion regalis; Beaufort. 



