244 



BUIJ.ETIN 120, UNITED STATES KATIONAI. MUSEUM. 



in 0. asiatica, Avhile they arc very much larger and ellipsoidal in 

 O. \lni.foxend]. Until we understand someAvhat more definitely the 

 nuclear phenomena throu<rh()ut the whole life cycle, we must leave 

 in douht the connection between these two forms of Opalina from 

 Hufo huff) asiaticus. 



OPALINA, species (?). 



IJost. — Ilyla sept("nt)-lu)iarif^ Boulen<2:er, United States National 

 Museum No. 518G7, Los Hermanos Mountains, Cuba, May 31, 1914, 

 P. ]?artsch, collector. 



This is a narrow species. The material is unsatisfactory for de- 

 scription. No specimens have been deposited with the United States 

 National Museum. 



OPALINA, aperies (?). 



A specimen of this form has been deposited with the United States 

 National Museum as No. 16618. 



Host. — Rana mascareniensis Dumeril and Bibron. one infection, 

 from T nited States National Museum specimen No. 1531 12. from 

 the Gold Coast, Africa, -A. Guenther. collec- 

 tor (_?). 



This material is not well enough preserved 

 for study. The Opalinas are multinucleated, 

 broad and flat and seemingly belong among the 

 7'anarum.-\ike species. They are small, 0.18 

 mm. long by 0.13G mm. wide. In the same 



Fig. 220. — Opalina, • ^r . .i xt 



sr-EciEs (?), FROM host ai'c ver}^ numerous iSyctotherus. >No speci- 

 rana mascarbn- men of this form has been deposited with the 

 AMETEifs. National Museum. 



OPALINA [LARVARUM], new species (?). 



A specimen of this form has been deposited with the United States 

 National Museum as Cat. No. 16629. 



Ilost. — Tadpoles of Rana damitans Latreille (?), from Chester, 

 Nova Scotia, June 10, 1920, Dr. Charles E. Simon, collector. 



Measurements;: A of an ordinary individual; B of a hroad individ- 

 ual: G of a slender individual. — 



_ I 



mm. 



Length of body 0. 073 



Width of body . 0545 



Length of posterior process I . 005 



Diameter of nucleus 0. 0065-. 0075 



Length and width of anaphase nucleus '. 0175 X • 005 



Cilia line interval: 1 



Anterior . 00315 



.Middle . 0058 



mm. mm. 



0.0717 0.075 



. 0684 . 0455 



.0056 



