192 



BULLETIX 120, UNITED STATES NATIONAL. MUSEUM. 



Measurements of a ■mediura sized individual. — Length of body 

 0.236 mm. ; width of body 0.09 mm. ; thickness of body, anterior 0.01 



mm., middle 0.018 mm., posterior 

 0.008 mm. ; diameter of nucleus, 

 0.00375 mm. to 0.0048 mm.; di- 

 ameter of endospherule 0.0015 

 mm. to 0.0022 mm. ; cilia line in- 

 terval, anterior 0.0019 mm., mid- 

 dle 0.0029 mm., posterior 0.0035 

 mm. 



This infection shows some 

 broad forms similar to those 

 from Rana aurora, and it may 

 well belong to the same subspe- 

 cies. The nuclei run larger than 

 those in the infection from the 

 latter species. ,. 



OPALINA OBTRIGONOIDEA ORBICU- 

 LATA, new subspecies. 



Fig. 161. — Opalixa obtrigonoidea lata, 

 FROM Rana aesopus, X 117 diameters. 



Tyjye. — United States National 

 Museum Cat. No. 16565. 

 Host. — Uyla cinerea Schneider, five infections, from Texas, Louisi- 

 ana, Florida, and Maryland. The type infection is from United 



Fig. 162. — Opai-ina obtrigonoidea ORBicuiyATA^ X 117 diameters. The eight animals 



AT THE LEFT ARE FROM ONE HOST; THE FODR AT THE RIGHT ARE FROM ANOTHER HOST. 



States National Museum specimen No. 12005, 42 mm. long, from 

 Georgiana, Florida; W. Wittfield, collector. 



