OPALINID CILIATE INFUSORIANS — METCALF 



547 



out of three from Andros Island in the Bahamas (Nos. 64160 and 

 64163) were infected with moderately well preserved opalinas. They 

 are evidently the same species as some seen in the same species of host 

 in my former study, but not described because of unsatisfactory 

 preservation. 



Measurements, in microns* Body (a) 380 by 150, (6) 210 by 154, 

 (c) 90 by 60, (d) nuclei 4.2, 4.6, 5 by 4.2, length of cilia 8.9, interval 

 between lines of cilia 1.5, The body is large in full-sized specimens, 

 the nuclei are small, and the lines of cilia close together. 



OPALINA ELONGATA Catini 



Figures 115, 116 



Hosts: Hyla rubra Daudin; H. albomarginata (Spix). 



Several years ago Prof. Adolpho Lutz, of the Oswaldo Cruz Institute, 

 Rio de Janeiro, sent me a good slide of this interesting elongated 

 Opalina from Hyla rubra. I have since found it in one H. rubra 



Figure 115.— Opalina dongata Carini from Ilyla rubra, X 72. 



and in six out of seven specimens of H. albomarginata. Especially in 

 specimens from H. albomarginata they are pointed behind, often with 

 a short spinelike point. 



Measurements, in microns: From H. rubra, body 1,100 by 70, 

 length of cilia 6.7; from H. albomarginata, body 980 by 50, 333 by 55, 

 width of body 41.5, nuclei 7, 5.2, dividmg nuclei 9 by 6, 8 by 4.5, 

 length of cilia 6.7, interval between lines of cilia 2. 



