536 



PROCEEDINGS OF THE NATIONAL MUSEUM 



VOL. 87 



Measurements, in microns: Body 110 by 77, 125 by 64, 100 by 24, 

 70 by 26, 114 by 55; nuclei 3.3, 4, 4.2, dividing nucleus 10 by 2.2; 

 length of cilia 6.1; interval between lines of cilia 2.8. 



OPALINA species (7), probably of the JAPGNICA group 



FiGUKE 104 



Host: RaTui hexadactyla Lesson, tadpole, a specimen from southern 

 India in a late stage of metamorphosis, but with tail not absorbed 

 (total length 46 mm., hind legs 19 mm. long, fore legs 6.5 mm.). 



The drawings show: a, A Cepedea stage; b, an older Cepedea stage; 

 c, an Opalina, probably not quite of mature form. 



Figure lOi. —Opalina sp. (?), probably of the japonica group, from tadpoles of i?ana hexadactyla, X 410. 



