THE OPALINID CILIATE IXFUSORIAXS. 



95 



ZELLERIELLA DENDROBATIDIS. new species. 



Type.— Vnited States National Museum Cat. No. 16468. 



Hosts. — Dendrohates tinctorius (Schneider), three infections, in 

 United States National Museum specimens No. 32535, 39 mm. long 

 (the type infection, abundant), from Costa Rica, Gabb, collector; No. 

 19771 and No. 19772, both from Grey town, Nicaragua, April 10. 



I 



i 



Fig. 62. — Zellkriella [engystomopsis], from Exgystomops stentok, ix loxgi'iodixal 

 fission, x 1,000 diameters. 



1892, C. W. Richmond, collector; and Dendrohates typographus 

 Keferstein, six infections in United States National Museum speci- 

 mens Nos. 30585, 32322, 19588, 19590, 19652, and 19653, all from 

 Nicaragua or Costa Rica. 



Measurements of an average individual. — Length of body 0.077 

 mm. ; width of body 0.05 mm. ; thickness of body 0.014 mm. ; diameter 



