TRANSACTIONS OF MICROSCOPICAL SOCIETY. 
DESCRIPTION OF PLATE III, 
Illustrating Mr. Lauder's paper on New Diatoms. 
Fig. 
1. — Perfect filament of Baderiastrum varians. 
2 a, — Terminal cells. 
2 5.— Separate awn. 
3 a. — Intermediate cell. 
3 b. — Separate awn. 
4. — Terminal cells. 
5. — Erustules of B. varians. 
6. — Sporangium of same. 
la. — B. hyalmum. 
7 The same. 
8. — Species of Chactoceros. 
