598 



Hexasterias problematica rr, Dictyocha fibula rr, D. speculum rr, Pachg- 

 sphaera pelagica rr. 



No. 68. Chaetoceras simile rr, Coscinodiscus lineatus rr, C. sablilis rr, 

 Coscinosira polgchorda rr, Thalassiothrix Fraunfeldii rr, 77*. longissima rr, 

 Peridinium decipiens, var. r, Pterospernia Vanhoffenii rr, Hexasterias proble- 

 matica rr, Coccolithophora pelagica rr, Dictyocha speculum rr. 



only a few species occur, and the rich samples from Trangisvaag- 

 fjord and Nolsofjord in which the neritic Rhizosolenia Shrubsolii 

 accompanied by Leptocylindrus and Chaetoceras plays a prominent 

 part. It appears as if the waters of the Ocean contain a poor 

 Styliplankton which by coming near the land and between the is- 

 lands, gets intermixed with a rich neritic Diatomplankton, which I 

 will call Sol enia plankton; it is characterized by the occurrence 

 of Rh. Shrubsolii and færoénsis and perhaps Thalassiosira bioculata 

 (see below, August —September 1902 from Nolsofjord). In Septem- 

 ber a sample was gathered, consi sting mainly of Chaet. debile, 

 which species was already fairly common in August; it is the 

 neritic Contorto plank ton characterized by the occurrence of 

 C. debile, C. contortam, etc. which is appearing here. In November 

 there is hardly any plankton, and in December a poor Sphæra- 

 plankton occurs. 



1898, Table II. On coming to 1898 we find that the first 

 gatherings were in May; they contain typical Chætoplankton. Dur- 

 ing the summer (July — August) the oceanic samples (Nos. 23, 25, 28) 

 were very poor, and those gathered between the islands somewhat 

 richer, but the rich Soleniaplankton does not occur; on the other 

 hånd species of Ceratium are fairly constant in the samples; un- 

 forlunately, at the time of the investigations, C. horridum, f. genuina 

 and C. longipes were not kept distinct, so no decided opinion can 

 be formed regarding these gatherings, but the regular, though scanty 

 occurrence of Peridinium depressum and P. pallidum suggests that 

 Longipesplankton must have prevailed during the whole of the 

 summer along the Færoes, which again proves that the islands 

 have been washed by the cold current from the east coast of lee- 

 land. In October a fairly rich plankton is met with consisting of 

 Scoticaplankton intermixed with Contortoplankton, Halosphaera viri- 

 dis occurs simultaneously ; and in December there is a poor Disco- 

 plankton. 



1899, Table III. In January — February the same conditions 

 prevail as in December 1898: Disco- and a Iittle Sphæraplankton ; 



