OPALINID CILIATE INFUSORIANS METCALF 



553 



Measurements, in microns: The individuals that appear fully 

 grown average 200 to 250 in length, but some measure 300. The 

 width is 40 to 50, but there are some large forms that measure up to 

 70 and 80. There is frequently seen a border of clear ectoplasm. In 

 the cytoplasm there are a number of spherical nuclei 3.5 to 5 in diam- 

 eter, irregularly distributed in 4 to 6 longitudinal rows. 



Figure 121.— Opalina nebulosa Carini from Hyla nebulosa, X ca. 200. (After Carini.) 



Three fully grown animals and three smaller forms are shown m 

 figure 121. 



OPALINA RADDIANA Carini 



Host: Hyla raddiana Fitzmger, from BrazU. 



The body is greatly flattened, often bent. 



Measurements, in microns: The average length is 300 to 500, but 

 there are individuals that measure 450. The slender forms have a 

 width of 40; most individuals are about 60 wide, the largest speci- 

 mens measuring 80. The nuclei are spherical, 5 to 6 in diameter. The 

 endospherules are large and numerous. The pellicle is thin. (Carmi 

 gives no drawings. There is insufficient description.) 



FIGURE 122.-"Opalina mdafricana" Fantham from Bufo resutans, X 300. (After Fantham.) 



