'M 2 



Ovi; I'aii.skn. 



iiu'Msiiii's of tilis spc'cii's: 158, 4;'), 48, 52, ")(), V-tiSn. P. pcllnridnni \\.\s 

 llu' coinmoiu'sl DiiiollagoUale in the samples, il occurred in Dan- 



B^ -^ C 



Vi}>. 11. I\-ri(liniiini pcUiicidani. 'M'y t. m. 



marks Havn, the coastal water, the pack-ice and in the open sea, 



and often frequently. 



Distrilj. Widely dislrihiited neritic species, occurriiij^ from the Medi- 

 ten-;uic;ui to Spitzber|»en :md (ireenhmd. 



15. Peridinium islandicum Paulsen, Meddel, fra Kommis, f. 

 Havundersøg., Ser. Plankton, Bd. I, No. 1, 1904, p. 23, fig. 7; Paulsen 

 Nord. Plankton, p. 49 — 50, fig. 62; Broch, Spitzbergen Plankton, 

 1). 46, lig. 18-20. 



The cells were rather flat, es they have been figured by Broch. 



A single specimen measured was 44 fjt long. Icelandic specimens 



are 53—62 /i (Nord. Plankton.) The species was fairly common in 



Danmarks Havn, the coastal water, and the pack-ice, but in the 



open sea it was found once only. 



Distrib. Arctic neritic species, known from Nortli Iceland, Spitz- 

 l)ergen and (ireenland. 



16. Peridinium varicans n. sp. (fig. 12). 



Celliila (jlohoso - rhomboidea. 



epitheca acuta, hypotheca spinas 

 duas divergentes fvaricantesj a 

 fissura longitudinali remotas gerente 

 et inter spinas linea paulum et 

 regulariter curuata terminante, cin- 

 gulo transversa dextrorsum circum- 

 iente, fossa longitudinali lata ad 

 marginem sinistram ala augusta 

 praedita. Epitheca tabulis ÎA, in- 

 tercalari o parva, hypotheca ta- 

 bulis 7 constructa. Long. cell. 



36 a. Hab. rarissime in mare gelido prope oram orientatem Groen- 



landiae. 



This species which was found in two samples from the coastal 



Fig. 12. Peridinium varicans. .'57.') t. m. 



