124 BULLETIN 120, UNITED STATES NATIONAL ^MUSEUM. 



No. 52279, 82 mm. long, the type infection, Jan. 5, 1915, and No. 

 62297, 57 mm. long, March 31, 1915, both collected by R. D. Camp. 



Measurements of an average individual. — Length of body 0.1174 

 mm.; width of body 0.074 mm.; diameter of nucleus 0.0141 mm.; 

 length of endospherule 0.0022 mm.; width of endospherule 0.0013 

 mm.; cilia line interval, anterior 0.00165 mm., middle 0.00287 mm., 

 posterior 0.00375 mm. 



The larger nuclei and the much larger, elongated endospherules 

 in this form indicate that it is probably distinct, though it is 

 very similar to the species type. Some larger individuals with 

 ellipsoidal nuclei are found in one of the infections. These 

 apparently are preparing for division. The spherical, resting nuclei 



show four chromatin masses 

 of quite unequal size. The 

 ellipsoidal nuclei are not well 

 preserved for observation of 

 internal structure. 



ZELLERIELLA [of BUFO PELTO- 

 CEPHALUS], not described. 



Host. — Bufo peltocephalus 

 Tschudi. 



One very scant infection 

 along with Protoopalina 

 hufonis in the United States 

 National Museum in speci- 

 men No. 51864, 127 mm. long, from Cuba, June 3, 1914; J. B. Hen- 

 derson and P. Bartsch, collectors. 



The presence of these very few specimens of this Zelleriella was 

 not detected until the stained material had faded too much for ade- 

 quate study. No specimens are deposited in the National Museum. 



ZELLERIELLA [of BUFO PUNCTATUS], new species (?). 



A specimen has been deposited in the United States National Mu- 

 seum as Cat. No. 16488. 



Host. — Bufo punctatus Baird and Girard, seven abundant infec- 

 lions, four from La Paz, California, and three from Furnace Creek, 

 Death Valley, California, March 21, 1891. One of the latter, United 

 States National Museum specimen No. 18769, 57 mm. long, a female 

 with eggs 1 mm. in diameter, furnished the type infection. 



Fig. 90. 



-Zelleriella intermedia cuneata, X 



460 DIAMETERS. 



