THE OPALIXID CILIATE INFUSORIANS. 



131 



ZELLERIELLA TELMATOBII, new species. 



Type — United States National Museum Cat. No. 10498. 



Host. — Tehnatohius jelskn (Peters) ; two infections — one scant, 

 from Guamote, Ecuador; the other, the type infection, from United 

 States National Museum specimen No. 38577, 32 mm. long, from 

 ]Manca Island, Peru, July 23, 1908 ; R. E. Coker, collector. 



Measurements of an ordinary individual. — Length of body, 0.191 

 mm. ; width of body, 0.125 mm. ; thickness of body, 0.024 mm. ; length 

 of nucleus, 0.023 mm.; width of nucleus, 0.0174 mm.; cilia line in- 

 terval, anterior 0.00315 mm., middle 0.004 mm., posterior 0.0056 mm. 



Fig. 97. — Zelleriell.v telmatobii, X 460 diameters. 



This large ZellerieUa differs decidedly in body form from any 

 other species of the genus, and. though much flattened, might almost 

 be regarded as an aberrant Protoopallna. It seems much like P. 

 xyster.^ except that instead of only the anterior part of the body being 

 flattened, the w^hole body is flat. 



The ectosarc in this species is very thick and is quite coarsely 

 alveolated. The endosarc contains many large vacuoles, but is not 

 so completely filled with them as is the endosarc of P. xyster. The 

 nuclei are not well enough preserved for study of their internal struc- 

 ture, but in form and size they resemble those of P. xy-'^ter. The wide 

 spacing of the cilia lines is a marked feature. 



