EXPLANATION OF PLATES. 11 



Fig. 1. — Trie. Hardmanianium, Grev. 

 " 2.— do. do. 



" 3.— Trie, cellulosum, car. major, N. Var., Wk C. 

 " 4. — Trie. Harrisonianum, Norman <£• Grev. 

 " 5. — do do 



" 6.— Trie, radiatum, Bright. 

 " 7. — Trie, rep) e turn, Grev. 

 " 8. — Trie, cellulosum, Grev. 

 " 9.— Trie, granulatum, N. Sp., JF. & c?. 

 " 10.- — Trie, venosum, forma parva, Weissflog. 

 " 11. — Trie, venosum, Brighwell. 

 " 12. — Ditylum Ehrenbergii, (E.) Grun. 

 " 13. — Syndetocystis Grevilleanus, Rolfs. 

 " 14. — Euodia Barbadensis, Grev. 

 " 15.— Trie, minutum, N. Sp., W. & C. 



PLATE TT- 



Fig. 1. — Actiuoptychus Wittii, var. Scutiformis, IV. Far., JV. & C. 

 2. — do do do 



3. — Stephanopyxis pulchra, N. Sp., W. & C. 

 4. — Coscinodiscus oblongus, Grev. 

 5. — Porodiscus splendid us, Grev. 

 6.— P. oblongus, Grev. 

 7. — Asterolampra marginata, Grev. 

 8. — do do var. minor, N. Var., IV. & C. 



