KoPOiD/— New Species of Dinoflagellates. 



PLATE 1. 



Fig. 1. Prorocentrum curvatum, sp. nov., lateral view. X 565. From life. 



Fig. 2. Tlie same, anterior face. X 565. 



Fig. 3. Pi/rocj/stis fusi/ormis, forma biconica, f. nov. X 100. 



Fig. 4. Pijrocystis acuta, sp. nov. X 62. 



Fig. 5. Pijrocystis robusta, sp. nov. X 320. 



Fig. 6. Pyroojstis semicircularis (Schroder), lateral view of yoked pair. X 100. 



Fig. 7. Pouchetia panamensis, sp. nov., ventral view. X 895. From life. 



Fig. 8. Ptijchodiscus carinatus, sp. nov., ventral view. X 450. From life. 



Fig. 9. Lateral view of the same. X 450. 



Fig. 10. Amphilothus quincuncialis, s]^. nov. Oblique view of right face. X 895. 

 From life. 



