THE OPALINID CILIATE INFUSORIANS. 



83 



specimen No, 21215, 51 mm. long, and one other are from Seoul, Ko- 

 rea. August, 1883 ; P. L. Jouy collector. The third is from Southern 

 Manchuria; A. cle C. Sowerby, collector. 



Measurements. — Length of body 0.23 mm.; width of body 0.03 

 mm.; length of nucleus 0.0156 mm.; width of nucleus 0.008 mm.; 

 diameter of endospho rules 0.0016 mm., 0.00175 mm.; cilia line inter- 

 val, anterior, first specimen 0.00175 mm., second specimen 0.0022 mm., 



Fig. 52. — Protoopalina axondcleata : a to e, magnified 460 diameters ; ^, the nbxt 



TO THE anterior NUCLEUS OF C, MAGNIFIED 1,380 DIAMETERS. 



posterior, first specimen 0.003 mm., second specimen 0.0033 mm. 

 Four massive chromosomes. 



This long, rather slender Protoopalina presents about the variety 

 of form shown in the figures. The individuals shown in figure 52, 

 6 and c are apparently anterior daughter cells recently come from 

 division, as indicated, first, by their pointed or irregular posterior 

 ends, and, second, by the fact that in each case one nucleus has either 

 not yet divided (c) or has not yet quite completed the restoration of 



