530 PROCEEDINGS OF THE NATIONAL MUSEUM vol.87 



Measurements, in microns: Body (a) 200 by 100, (b) 183 by 100, 

 (c) 85 by 38, (d) nuclei 5.9 by 3.3, 4.5 by 3.1, length of cilia 13.8, 

 interval between lines of cilia 1.2. 



OPAUNA MALAYSIAE, new species 



Figure 95 



Type: U.S.N.M. No. 22646. 



Host: Rana labialis Boulenger. 



Two specimens of this frog from Trong, Lower Siam (U.S.N.M. 

 Nos. 24040 and 24042), each 47 mm. long, were both infected with the 

 same species of Opalina. These opalinids rather closely resemble 

 those from R. macrodactyla and R. macrodon, except that the nucleolar 

 substance is not aggregated into one or two subcaryothecal spheroidal 



Figure 95. — Opalina malaysiae, new species, from Rana labialis: a and 6, X 78; c, X 673. 



disks but is in three or four or more masses as in many species. The 

 labialis infections show animals half as large, or less, and they show a 

 larger proportion of forms slender, especially behind. Their shape, 

 too, is more irregular. They seem a distinct species. 



Measurements, in microns: Body 180 by 118, 120 by 70, 67 by 42; 

 width of body (another specimen) 81, nuclei 4.5, 3.8, 3.6, dividing 

 nucleus 9.9 by 2.7, length of cilia 10, interval between lines of cilia 2.9. 



opalina malaysiae (?) 



Figure 96 



Host: Microhyla ornata Dumeril and Bibron. 



In a tadpole of this frog, 22 mm. long and with all four legs well 

 developed, there was found a single Opalina with measurements, in 

 microns, as follows: Body length 125, greatest width 49; length of 

 oval nucleus 6, width 4.4; length of daughter nucleus in anaphase 6.4, 



