THE OPALINID CILIATE IXFUSOEIANS, 



145 



This Cepedea has something the shape of C. dimidiata, but its 

 more slender individuals are less slender than the slenderer form 

 of the latter species, and its most stocky individuals are much less 

 stocl^ than the most pronounced zelleri form of C. dimidiata, but a 

 larger series of infections might very likely show greater divergence 

 of form than do my four infections taken at one time from one lo- 

 cality. Many individuals have a form much resembling that of 

 Paramecium (Fig. 109, d and h). The species is distinguished from 



Fig. 109. — Cepedea saharana : a, a group of animals, showing the range of size 



AND form in a single INFECTION, X 117 DIAMETERS ; 6, THREE CHARACTERISTIC INDIVID- 

 UALS FROM ANOTHER INFECTION, X 117 DIAMETERS ; C, AN INDIVIDUAL FROM THE SAMB 

 INFECTION AS 0, MAGNIFIED 460 DIAMETERS ; d, AN INDIVIDUAL FROM THE SAME INFEC- 

 TION AS b, MAGNIFIED 460 DIAMETERS. IN C AND (l ALL THE NUCLEI ARE INDICATED, 

 THERE BEING 71 IN C AND 72 IN (7. THE EATIO BETWEEN^ THE BULK OF THE BODY AND 

 THE COMBINED BULK OF ALL THE NUCLEI IS EVIDENTLY NOT THE SAME IN C AND (/. 



C. dimidiata by its minute nuclei. In both the slender and the 

 broader individuals the nuclei are but from 0.0027 mm. to 0.003 mm. 

 in diameter, while the nuclei of the slender form of C. dimidiata are 

 about five-thirds as large, and those of the form zellen are from twice 

 to three times as large. 



CEPEDEA BUERGERI. new species. 



Type—Urnitd States National Museum Cat. No. 16582. 

 Host — Polypedates huergeri (Schlegel), three infections from Ja- 

 pan, the type infection being from United States National Museum 



