PLATE L. 



Fig. 1. — i M tin. Enlarged 500 diameters. Description, p. 9G8l 



fina Mann. Enlarged 500 diameters. Description, p. 285, 

 Fig. Z—Mdosira medusa Mann, enlarged 500 diameters. Description, i>. 2 



Vdorira scopot Mann. Enlarged 600 diameters. Description, p. 

 Fig. 5. — Stictodiac Kfann. Enlarged 600 diameters. Description, p. 2 



Fig. 6. — TYipodiscu* beringensi* Mann. Description, i>. '27>. 



1.14 



