eO ' 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 Ceratomyxidea 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. 



LEPTOTHECA AGILIS Thelohan 

 [Figs. 1 to 5] 

 1892 Ceratomyxa agilis Th61ohan 1892 : 962 



1895 Leptotheca agilis Thflohan 1895 : 332 



1898 Leptotheca agilis Doflein 1898 : 294, 297 



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 85^1 by 20 to 25/n. 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 7n, 

 breadth 11 to 12/t. 



LEPTOTHECA ELONGATA Thelohan 

 [Fig. 6] 



1895 Leptotheca dongata Thflohan 1895 : 332 



1898 Leptotheca dongata Doflein 1898 : 312 



1917 Leptotheca dongata Georgevitch 1917b : 99-106 



Habitat: Gallbladder of Merluccius merluccius L. (M. vulgaris) and 

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



