Kofoid. — New Species of Dinoflagellates. 



PLATE 1. 



Prorocentrum curvahtm, sp. nov., lateral view. X 565. From life. 

 The same, anterior face. X 565. 

 Pyrocystis fusiformis, forma biconica, f. nov. X 100. 

 Pyrocystis acuta, sp. nov. X 62. 

 Pyrocystis robusta, sp. nov. X 320. 



Pyrocystis semicircularis (Schroder), lateral view of yoked pair. X 100. 

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

 Ptychodiscus carinatus, sp. nov., ventral view. X 450. From life. 

 Lateral view of the same. X 450. 



Amphilothus quincuncialis, sp. nov. Oblique view of right face. X 895. 

 From life. 



