208 



BULLETIN 120, UNITED STATES NATIONAL MUSEUM. 



OPALINA OREGONENSIS, new species. 



Type. — United 'States National Museum Cat. No. 16548. 

 Host. — Hyla regilla Baird and Girard, two abundant infections 

 from Vancouver Island, and another, the type infection, from United 



States National Museum speci- 

 men No. 51905, 40 mm. long, 

 from Three Sisters, Oregon, 

 3,000 feet elevation, July 17, 

 1914 ; V. Bailey, collector. 



Measurements of a large in- 

 dividual. — Length of body 

 0.526 mm. ; width of body 0.123 

 mm.; thickness of body 0.017 

 mm. ; length and width of nu- 

 clei, first 0.005 mm. by 0.003 mm.; second 0.007 mm. by 0.004 

 mm., third 0.0075 mm. by 0,0032 mm.; cilia line interval, anterior 

 0.0014 mm., middle 0.0025 nun., posterior 0.003 mm. 



This large species differs 

 from 0. virguloidea, from the 

 same host, chiefly in having 

 nearly all of its nuclei ellip- 

 soidal. 



OPALINA KENNICOTTI, new species. 



Fig. 



177. OPALINA OREGONENSIS, X 117 DIAM- 

 ETERS. 



-OpALINA KENNICOTTI, 

 ETERS. 



X 117 DIAM- 



Type. — United States Na- 

 tional Museum Cat. No. 16551. 



Host. — Bana areolata Baird 

 and Girard, one abundant in- 

 fection, from United States 

 National Museum specimen 

 No. 9386, 45 mm. long, from fig. i78.- 

 northern Illinois; R. Kenni- 

 cott, collector. 



Measurements of a medium sized individual. — Length of body 0.24 

 mm.; width of body 0.085 mm.; thickness of body, anterior 0.018 

 mm., middle 0.027 mm., posterior 0.022 mm.; length and width of 

 nuclei, first 0.00425 mm. by 0.00425 mm., second 0.0045 mm. by 0.0045 

 mm., third 0.0052 mm. by 0.003 mm., fourth 0.006 mm. by 0.0031 mm., 

 fifth 0.00675 mm. by 0.0035 mm., sixth 0.0075 mm. by 0.0035 mm., 

 seventh 0.0075 mm. by 0.0046 mm. ; cilia line interval, anterior 0.0025 

 mm., posterior 0.00437 mm. 



This Opalina is intermediate in form between 0. ohtHgonoidea^ 

 and 0. virquloidea. A few of its nuclei, doubtless daughter nuclei 



