74 



BULLETIN 120, UNITED STATES NATIONAL MUSEUM. 



of pointed (P. rhinodermatos) or spinous {P. longinucleata) . Its 

 slender ellipsoid or spindle-shaped nuclei are usually united by a 

 thread. Their histological condition, in my material, does not 

 allow study of the chromosomes, but the form of the nuclei and the 

 fact that they are still united by a thread shows them to be doubt- 

 less in an earlier mitotic phase than the nuclei of P. rhinodermatos 

 and P. longinucleata. This species should naturally, therefore, 

 have been described before the latter two, but it is convenient to have 

 their nuclear condition in mind before describing this form. 



PROTOOPALINA BUFONIS, new species. 



Type. — United States National Museum Cat. No, 16495. 

 Host. — Bufo feltocefhalus Tschudi, three infections; two, scant, 

 from Pinar del Rio, Cuba, and another, the type infection, from 



a 



Pio. 45. — Photoopalina buponis, X 460 diameters : a, the usual condition ; h, o, 



AND d, YOUNGEB AND OLDER DAUCnTEU CELLS. 



United States National Museum specimen No. 51864, 127 mm. long, 

 from Cuba, June 3, 1914 ; J. B. Henderson and P. Bartsch, collectors. 



