NOTES ON SPECIES 171 



Dinophysis tripos, Gourret. 

 Lebour, 1925, p. 82, fig. 22. 

 This is the D. homunculus var. tripos of Paulsen. It was not observed in the material 

 examined in detail for this paper, but has a very significant distribution in the South 

 Atlantic (see p. 25), being apparently confined to the eastern portion. It was moder- 

 ately abundant in the phytoplankton collected round the Cape of Good Hope, often in 

 catena, which rendered it one of the most conspicuous species during the preliminary 

 examinations on board. 



Dinophysis spp. 



Present in very small numbers at about half the stations worked in the Antarctic 

 Zone. As they never formed any important proportion of the phytoplankton their 

 identification has been deferred. 



Genus Amphisolenia, Stein 

 Amphisolenia globifera. Stein. 

 Paulsen, 1908, p. 20, fig. 23. 

 Observed at one tropical station. 



Genus Ornithocercus, Stein 

 Ornithocercus steinii, Mangin. 

 Mangin, 1922, p. 75, fig. 17. 

 Observed at one station in sub-tropical water, in long. 30"^ W. 

 Ornithocercus magnificus, Stein. 

 Mangin, 1922, p. 74, figs. 18, 19. 

 Very generally present in small numbers in the tropics. 



Family PERIDINIIDAE, Kofoid 

 Genus Goniodoma, Stein 

 Goniodoma polyedricum (Pouch.), Jorg. 

 Lebour, 1925, p. 90, fig. 26. 

 At one station in the tropical Zone, in long. 30° W. 



Genus Goniaulax 

 Goniaulax polygramma, Stein. 



Lebour, 1925, p. 94, pi. xiii, figs. 4 a-c. 

 A form apparently referable to this species was observed at one station in sub- 

 Antarctic water in long. 30^ W. 



Goniaulax sp. 



Observed at one sub-tropical station in long. 30° W. 



