TRANSACTIONS OF MICEOSCOPICAL SOCIETY. 
DESCRIPTION OF PLATE III, 
Illustrating Dr. Donkin^s paper on the Marine Diatomacese 
of Northumberland. 
Fig. 
1. — Toxonidea Gregoriana^ n. sp. 
2. — „ insignis, n. sp. 
^,-^Fkurosigma marinum, n. sp. 
4. — „ lanceolatum^ n. sp. («, S. V. ; 5, P. V.) 
5. -^ „ carinatum, n. sp. («, S. V. ; F. V.) 
6. — „ rectum, n. sp. 
7. - — Wansbeckii, n. sp. 
8. — „ minutum, n. sp. 
9. — „ angustum, n. sp. 
10. — „ arcuatum^ n. sp. 
11. — Cocconeis excentrica, n. sp. 
12. — Bacillaria cursoria, n. sp. {a^ E. Y. ; frustule undergoing self- 
division ; (7, a group of frustules.) 
13. — Amphiprora duplex, n. sp. {a, S, V. ; &, E. V. ; a double frustule.) 
14. — Upithemia marina, n. sp, («, S. Y. ; b, F. Y.) 
15. — Amphora litoralis, n. sp. («, P. Y., ventral surface in focus; b, E. Y. 
dorsal surface in focus ; both drawn from the same frustule.) 
16. — „ arenaria, n. sp. (a, E. Y. ; b, S. Y., outer surface ; c, the 
same, inner surface.) 
17. — Navicula lineata, n, sp. 
18. — „ aestiva, n. sp. 
19. — « and ^. N.gramlata,V>^%\i. 
Magnified 400 diameters. 
