Marille Plankton from the East-Greenland Sea. 



309 



Ostenfeld's original figure (I.e.) we learn that the rhomb-plate is 

 not oblique and that it apparently does touch nor b nor f. As to 

 d, Ostenfeld's figure gives no evidence. An attempt to find the 

 original specimens was without result. But as the form of the 

 rhomb-plate is the most conspicuous difference between Broch's and 

 my specimens I venture to maintain that Broch has not had P. cur- 

 vipes before him. He says his species is in habit very like P. ovatum, 

 and this statement as well as his fig. 13 representing "P. ciirvipes C?) 

 . . . Ein Individuum . . . mit ausserordentlich stark entwickelten Inter- 

 calarstreifen" call to mind P. decipiens Jørgensen, which, however, 

 has no spines. 



P. ciirvipes was found in many samples from the pack-ice, the 

 coastal water, and Danmarks Havn, as a rule in few specimens 

 only, but in larger quantities in samples collected in the pack-ice 

 in August 1906. 



Distrib. ArcticC.') neritic species, known from W.-Greenland, Iceland, 

 tlie Faeroes, and the Nortli Sea. 



11. Peridinium breve Paulsen, Meddel, fra Kommis, for Hav- 

 undersøg. Ser. Plankton, Bd. 1, No. 5. 1907, p. 13; Nord. Plankton 

 p. 46, fig. 56; Broch, Spitzbergen Plankton p. 47, fig. 21. P. Steinii 

 Jørgensen /. brevis, Paulsen, Meddel. Kom. Havund., Ser. Plankton 

 Bd. 1, No. 3, 1905, p. 4, fig. 3 a-c, f. 



Fig. 7. Periiliniiiin breve. 375 t. m. 



Fig. 7 shows four cells of this species, which is indeed difficult 

 to discern from its relatives P. Steinii Jørg., and P. pyriforme Pauls. 



A — C has grown very old, thick and thick-walled, and the inter 

 calary bands are very broad. Length 56 «, surface finely reticulated. 



D is a small form, 40 /^ long- 



