60 ILLINOIS BIOLOGICAL MONOGRAPHS [298 



DESCRIPTIONS OF GENERA AND SPECIES 



Suborder EURYSPOREA nom. nov. 

 The definition of the suborder is recorded on page 56. 



Family CERATOMYXIDAE Doflein 



1899 Ceratoniyxidea Doflein 1899 : 378 



1901 Ceratomyxidae Doflein 1901 : 182 



The characters of the family are described on page 56. 



Genus LEPTOTHECA Thelohan 

 1895 Leptotheca Thelohan 1895 : 331 



The characters of the genus are described on page 56. 

 Type species: Leptotheca agilis Thelohan. 



Habitat: Gall-bladder of Trygon pastinaca L. and Scorpaeona sp.; 

 France, Rovigno, Napoli. 



Vegetative form: Form generally elongated. Anterior end rounded 

 where a mass of fat globules is found, while the posterior end terminates 

 in a point. Size not exceeding 85/i by 20 to 25/i. The posterior part is 

 sometimes divided into a certain number of lobes. In the protoplasm, 

 the globules are clearly seen. Pseudopodia are localized at the anterior 

 portion of the body. They are long, 40 to 50/i in length, filiform and very 

 active in moving from back toward front, just like the motion of oars. 

 Disporous. 



Spore: Slightly elongated. Dimensions: sutural diameter 6 to l/i, 

 breadth 11 to 12)u. 



LEPTOTHECA ELONGATA Thelohan 



[Fig. 6] 



1895 Leptotheca elongata Thelohan 1895 : 332 



1898 Leptotheca elongata Doflein 1898 : 312 



1917 Leptotheca elongata Georgevitch 1917b : 99-106 



Habitat: Gallbladder of Merliiccius merluccius L. {M. vulgaris) and 

 Motella tricirrata; Marseille, Banyuls, Le Croisic, Napoli, Monaco. 



