62 ILLINOIS BIOLOGICAL MONOGRAPHS [300 



Vegetative form: Small. No marked character. 



Spore: Globular. Form similar to the spore of Sphaerospora. Dimen- 

 sions: sutural diameter 8/i, breadth 10^. 



LEPTOTHECA HEPSETI Thelohan 

 1895 Leptotheca hepseti Th61ohan 1895 : 334 



Habitat: Gall-bladder of Atherina hepsetus L.; Marseille. Of rare 

 occurrence; Thelohan observed it but once. 



Vegetative form: Not described. 



Spore: Form triangular with rounded angles. Dimensions: sutural 

 diameter 7 to 8/i, breadth 12 to IS/x. 



LEPTOTHECA PERLATA (Gurley) Labbe 



[Fig. 8] 



1883 Balbiani 1883 : 201, 204 



1894 Chloromyxum {Sphaerospora) perlatum Gurley 1894 : 272 

 1899 Leptotheca perlata Labb6 1899 : 88 



Habitat: Acerina cernua L.; France (?). 

 Vegetative form: Not described. 



Spore: Elliptic. Two small polar capsules converging. Dimensions 

 not given. 



LEPTOTHECA sp. Awerinzew 

 [Figs. 16,17] 



1908 Leptotheca sp. Awerinzew 1908 : 51, 52 



Habitat: Gall-bladder of Sehastes norvegicus; Eastern Finmark? 

 Vegetative form: Rounded form with clear differentiation of proto- 

 plasm into ectoplasm and endoplasm. Plasmotomy occurs. 

 Spore: Undescribed. No figure. 



LEPTOTHECA MACROSPORA Auerbach 

 [Fig. 9] 



1909 Leptotheca macrospora Auerbach 1909 : 70-71 



1910 Leptotheca macrospora Auerbach 1910b : 768-769 

 1910 Leptotheca macrospora Auerbach 1910c : 167 

 1912 Leptotheca macrospora Auerbach 1912 : 42-43 



Habitat: Gall-bladder of Sehastes viviparus H. YLx.dindiS.dactylopterus; 

 Bergen, Kristiansund (May, September). 



Vegetative form: Trophozoites spherical with the average diameter 

 of 26 to 30/i. Homogeneous ectoplasm layer exhibits somewhat active 

 ameboid movements. Endoplasm, granular in living specimen, is rather 

 sharply distinguishable from the ectoplasm and contains large nuclei. 



