JOURNAL OF MICROSCOPICAL SCIENCE. 



DESCRIPTION OF PLATES V, VI, 



Illustrating Mr. BrightwelPs paper on New or Imperfectly- 

 known Diatomacese. 



PLATE V. 

 Pig. 

 1. — Actinocyclus areolatus ; a, side view; b, front view in outline. 

 2. — Actinocyclus, side view; a, front view; b, the same of two pustules 

 undergoing self-division, both in outline ; these two figures from 

 drawings by Mr. E. Kitton. 

 3. — Asterolampra Marylandica, Ehr., specimen with six segments. 

 4. — Craspedodiscus pyxidicula, Ehr * 



5. — Aulacodiscus sculplus, front view. 

 6. — Craspedodiscus, n. sp., fragment of a valve. 

 7. — „ „ side view. 



8. — Stephanogonia polygona, Ehr.; a, side view; b, front view. 

 9. — Hyalodiscus. 

 10. — Aulacodiscus radiatus, Bailey ; a, side view ; b, front view. 



PLATE VI. 



11. — Cyclotella, n. sp. ; a, side view ; b, front view of short filament. 



12. — Craspedodiscus, n. sp. 



VS.— Aulacodiscus, abnormal specimen. 



14. — Orthosira oceanica ; a, side view ; b, front view of pustule and single 



valve adherent. 

 15. — Actinocyclus, n. sp. 



16. — Cyclotella, n. sp. ; a, side view ; b, front view. 

 1 7 . — Eupodiscus. 

 18. — Actiwphania splendens, Shadb., showing both coarse and fine markings. 



All magnified 100 diameters. 



For Description of Plate VII, illustrating Mr. Archer's paper 

 on Desinidiaccac, sec Paper. 



