202 



BULLETIN 120, UNITED STATES NATIONAL MUSEUM. 



There is much diversity of form in this Opalina. The individual 

 measured as A is apparently an anterior daughter cell, short and 

 posteriorly broad and rounded. Kather numerous comma-shaped 

 forms are seen. The large, often very large, ellipsoidal nuclei and 

 the large disk-shaped endospherules are noticeable characters. 



OPALINA VIRGULA Dobell (1910). 



Host. — Polypedates [^^ Bhacophorus^^] maculatus (Gray), from 

 Peradeniya Botanic Gardens, Ceylon, August ; C. C. Dobell collector. 



Fig. 171. — Opalina virgula : a and h feom Dobell (1910); c, a very small indi- 

 vidual MAGNIFIED 1,000 DIAMETERS, ALL THE NUCLEI PRESENT BEING SHOWN ; d, A 

 GROUP OF ANIMALS FROM A SINGLE SLIDE, X 117 DIAMETERS ; e, AN ANIMAL OF USOAIj 

 CHARACTER, X 460 DIAMETERS. 



Professor Dobell very kindly sent me a slide of this interesting 

 Opalina when he first described it, and the description here given 

 is based upon this slide and upon Professor Dobell's paper. 



