ILLUSTEATIONS IN THE TEXT. XV 



FIGS. PAGE 



148. Cyphoderia trochus and vars. palustris and 



amphoralis : outlines of tests . 80 

 149, 150. trochus var. amphoralis : portions 



of tests 82 



151. Trinema enchelys : portions of tests . . 90 



152. ,, scales and apertures . 90 



153. Trinema lineare : outlines of tests . . 93 



154. Pseudodifflugia arcJieri . . . .121 



IbdjloQ.Lieberkuehniawac/eneri . . . 135,136 



157, 158. Allogromia fiuvialis . . . . .140 



159. Amphitrema stenostoma . . . .152 



160. Trinema enchelys, after Ehrenberg (1838) . 152 





