THE OPALINID CILIATE INFUSORIANS. 



153 



CEPEDEA GLOBOSA, new species (fig. 119). 



Type.— Vnited States National Museum Cat. No. 16524. 



Host.—PhyllomediLsa lemur Boulenger, one good infection, from 

 United States National 

 Museum specimen No. 

 29935, 22 mm. long, from 

 Turialba. Costa Rica: 

 Burgdorf and Schild, col- 

 lectors. 



Measurements of an ordi- 

 nary individual. — Length 

 of body 0.17 mm. ; width of 

 body 0.113 mm.; thickness 

 of body 0.656 mm. ; length 

 of nucleus 0.0065 mm.; 

 width of nucleus 0.0045 

 mm. ; length and breadth 

 of endospherules, first 

 0.0022 mm. by 0.0022 mm., 

 second 0.003 mm. by 0.0025 

 mm. ; cilia line interval, an- 

 terior 0.002 mm., posterior 

 0.0046 mm. 



This is a remarkably 

 chunky Cepedea., densely 

 clothed with long cilia. In 

 my specimens the axial re- 

 gion of the body is greatly 

 vacuolated, the irregular 

 vacuole and its branches 

 occupying more than half 

 the thickness of the body. 

 The body is considerably 

 flattened, its thickness be- 

 ing about two-thirds its 

 breadth. When discussing 

 the Opalinae we will com- 

 pare this species with a 

 series of others of similar 

 appearance, but increas- 

 ingly flattened, namely, 

 0. helenae., 0. helenae phyl- 

 lomedusae., and 0. morel- 

 etei. These forms, parasitic 



in the Hylidae, in histological appearance and in the condition of 

 the excretory vacuole resemble the forms Cepedea phrynomantidis. 

 83103—23 ^11 



Pig. 118. — Ckpedba obovoidea, x 4G0 diameters. 



