322 B. GRASSI AND A. SANDIAS. 
Fie. 11.—Dinenympha gracilis. 
Fie. 12.—Idem. 
Fic. 13.—Idem. 
Fic. 14.—Idem. 
Fie. 15.—Idem. 
Fic. 16.—The same, with spirilla attached to one extremity. 
Fic. 17.—The same, covered with spirilla. 
Fic. 18.—Pyrsonympha flagellata (the majority of the flagella are 
omitted). 
Fic. 19.—The same, in superficial view. 
Fie. 20.—The same, exhibiting the nucleus and rodlets. 
Fic. 21.—Holomastigotes elongatum (the majority of the flagella are 
omitted). 
Fic. 22.—The same, in superficial view. 
Fic. 23.—Plan of the lines of origin of the flagella on both faces of 
Holomastigotes elongatum. 
Fic. 24.—The same, in another individual. 
