TRANSACTIONS OF MICROSCOPICAL SOCIETY. 
DESCRIPTION OF PLATES I & II, 
Illustrating Dr. Greville's paper on New Diatoms. 
Series XI. 
Fig. 
1 . — Aulacodiscns Grevilleanus. 
2. — „ umbonakis. 
3. — „ amcenus. 
4. — „ radiahis. 
5. — „ pellucidus. 
6. — „ orientalis. 
7. — Triceratium concinnum. 
8. — „ partUim. 
9. — BiddulpJiia gigantea, 
10. — Cocconeis Barbadensis. 
11. — Coscinodiscus angulatus. 
12. — Terebraria Barbadensis ^ front view. 
13. — „ „ side view. 
All the figures are x 400 diameters. 
