THE OPALINID CILIATE INFUSOEIAXS. 



155 



Tliis small, xevy stock}^ Cepedea somewhat resembles C. glohosa. 

 Its body is relatively thicker. It has the axial excretory vacuoles 



a 



Fig. 120. — Cbpedea baudinii, X 4G0 diameters. 



almost as much developed. Its nuclei, however, are spherical instead 

 of ellipsoidal, and are much smaller. 



CEPEDEA PULCHRA, new species. 



Type. — United States National Museum Cat. No. 16504. 



Host. — Kaloula pulchra Gray.^ one abundant infection, from United 

 States National Museum specimen No. 10967, 51 mm. long, from 

 Cochin China ; donor, Museum of Natural His- 

 tory, Paris. 



Measurements of a (jood-sized individual. — 

 Length of body 0.142 mm. ; Avidth of body 0.0435 

 mm. ; thickness of bod}^ 0.022 mm. ; diameter of 

 resting nucleus 0.0025 mm. ; length and width 

 of dividing nucleus, first nucleus 0.0034 mm. by 

 0.0026 mm., second nucleus 0.0035 mm. by 0.0029 

 mm., third nucleus 0.0045 mm. by 0.003 mm.; 

 diameter of endospherule 0.001 mm. 



This small Cepedea is considerablj'^ flattened 

 and, like C. iiiadagascariensis., represents prob- 

 ably an approach to the condition of the Opali- 

 nae. Its very small resting nuclei are spherical, 

 but many nuclei are found in mitosis, the late 

 anaphase being long and slender. These slender 

 dividing nuclei, as well as the very small resting 

 nuclei, readily distinguish this species from 

 C. dimidiata and its several subspecies and from 

 C. madagascariensis. Many individuals show a 

 decided crowding of the endospherules in the anterior region of tho 

 body. 



Fig. 121. - 



PULCHRA, 

 AMETERS. 



