Plate XXVII; Figures 176 to 180; Magnified 500 



Diameters. 



Fig. 176. Zygnetna leiospertnutn D. By. . page 66 



Figs. 177, 178. Zygnetna stellium Ag. . 

 Fig. i7<). Zygnetna stellium var. genuinum 

 Kirch. ...... 



Fig. 180. Zygnetna cruciatum (Vauch.) Ag. 



