142 



HULLKTIX 120, rXlTEI) STATKS XATIOXAF. MUSEUM. 



slender thjin are the correspond iii<^ forms of ihe species itself. In 

 other words the two extremes are much less divergent in the sub- 

 species orlentalis than they are in C . dhnidlntd proper. The cilia are 

 longer than in C. dimidiuta. The broader individuals are often 

 spirally ridged in a peculiar way shown in figure 106, a. The 

 Japanese forms might about as well be recognized as a distinct 

 species. 



Fig. 106. — Ckpedea dimidiata okientalis : a, an outline drawing ok a stocky individual, 

 X 460 DiAMBT'BUs ; h, an optical section of a mokk slender individual from tub 

 same infection, X 460 diameters; c, a cyst, X 1,000 diameters. 



CEPEDEA DIMIDIATA [PARAGUENSIS], new subspecies (?). 



A specimen of this form has been deposited with the United States 

 National Museum as Cat. No. 16526. 



Host. — Flyla nasslca Cope, one scant infection, from United States 

 National Museum specimen No. 6226, from Paraguay ; Captain Page, 

 collector. 



Dl77icnsions of an ordinary individual. — Length of body 0.1382 

 mm. ; width of body 0.0456 mm. ; diameter of nucleus 0.003 mm. to 

 0.0044 mm., mean 0.004 mm.; cilia line interval, anterior 0.0019 mm., 

 posterior 0.00335 mm. 



This Cepedea is quite similar to C. dimidiata orlentalis. It is 

 hard to describe any diagnostic difference betwen them. They may 

 be identical, but the great divergence in their geographical habitats 



