OPALINID CILIATE INFUSORIANS — METCALF 527 



CEPEDEA SUBCYLINDRICA de Mello 



Figure 90 



Host: Bujo melanostidus Schneider, from Nova Goa. 



This multinucleate Cepedea is elongated and spindle-shaped; the 

 anterior end is generally less pointed than the posterior end. Varia- 

 tions are found in some animals; both the anterior and posterior ends 

 are blunt — they appear as cylinders. Several drawings are copied 

 from de Mello's paper, and they are diagrammatic although made with 

 the aid of a camera lucida. 



The measurements of a number of mdividuals show that they vary 

 in length from 35/i to 250^ and m width from 15m to 80/x; the 

 diameter of the nuclei is 2.5-3.5^. (The description is too scant 

 for specific identification.) 



CEPEDEA species (7) 



Cepedeas of an unidentified species were found in a Siamese speci- 

 men of Rana cancrivora Gravenhorst (U. S. N. M. No. 66550). It was 

 a scant infection and no drawings were made. Another specimen 

 (U. S. N. M. No. 66551) was uninfected. 



CEPEDEA species (?) 



Figure 91 



Host: Aelurophryne mammata Giinther, from Songpau, Szechwan, 

 western China. 



Specimens of this toad, 21 and 22 mm. long, were lightly infected 

 with Cepedeas too poorly pre- 

 served for study. In one host 

 the parasites averaged 66m long; 

 in the other they were mostly 

 about 190m in length by 36m wide. 

 In form both the large and the 

 smaller Cepedeas resemble C. 



dimidiata (Stein). Staining figure Ql.— Cepedea sp. (?) from Aelurophrynt 



proved peculiarly difficult, so mamma a, 



that no further report, upon nuclei or any other features, can be made. 



Genus OPALINA Purkinje and Valentin 



OPALINA RANARUM ORBICULATA, new subspecies 



Figure 92 



Type: U.S.N.M. No. 22644. 



Host: Eana glandulosa Boulenger. 



One specimen of this host from Singapore (U.S.N.M. No. 34514) 

 was very heavily infected with large Opalinas of the general ranarum 

 type, though its nuclei run somewhat smaller. In the great complex 



