84 



BULLETIN 120, UNITED STATES NATIONAL MUSEUM. 



the nuclear condition after mitosis (h). Figure 52, e, shows an indi- 

 vidual whose nuclei have entered upon the next mitosis preparatory 

 to fission. The next to the anterior pair of nuclei, though still con- 

 nected by a thread as is usual, are each alread.y in an anaphase of 

 mitosis, showing two sets of four massive chromosomes (fig. 52, /). 



PROTOOPALINA AXONUCLEATA LATA, new subspecies. 



Type. — United States National Museum specimen Cat. No. 16622. 



Host. — Bana nigromaculata Hallowell, United States National 

 Museum Cat. No. 39351, from 20 miles east of Hai-shin-ssu, Shensi. 

 China, August 11, 1909; A. de C. Sowerby, collector. 



Measurements: A., of a small individual with four nuclei; ^, of a 

 large individual with eight nuclei — 



Measurements. 



mm. 



Length of body ' 0. 158 



Width of body : 039 



Length of nucleus .01 



Width of nucleus 0065 



Diameter of endospherule . 002 



mm. 

 0.245 

 .051 

 .012 

 .0065 

 .002 



This form closely resembles that found in Bufo hufo asiaticus, but 

 is broader. There is in some individuals a wide, round pointed, pos- 

 terior process. In both the narrow and the broad forms of this spe- 



FlG. 53. PROTOOrALINA AxONUCLEATA LATA, X 460 DIAMETERS : a SHOWS FOUR MACRO- 

 CHROMOSOMES IN EACH NUCLEUS. IN EACH GROUP OF FOUR, ONE CHROMOSOME) IS 

 NOTICEABLY LARGER THAN THE OTHER THREE. 



cies the macrochromosome number seems to be four. In the sub- 

 species lata one of these macrochromosomes is noticeably larger than 



