^86 Algae. 



C. Aurivillius on the same route and in the Malay Archi- 

 pelago, and 3. by Dr. R. Wi 1 1 em se n on the route from 45^, 

 S. 220 E. to SO«^ S. 91» E. and from the last point to 2*^ N94<^E. 

 All the samples, except those from the Malay Archipelago 

 which were taken from May to September 1899, are from the 

 winter-time (December to March); and the Indian Ocean is 

 also still unexplored in the summer (April to December). — 

 The first part of the paper is a list of the organisms found 

 in the samples; both animals and plants are examined, but 

 we mention only the last. The foUowing numbers of the diffe- 

 rent groups are enumerated. Slllcoflagellata 2 species, Chloro- 

 phyceae \ sp., Cyanophyceae 2 sp., Muracytae and Cystae 

 6 sp., Dinoflagellata (Peridiniales) 64 sp. and Dlatomaceae 

 121 sp. There is also a long list of litoral dlatoms from the 

 Malay Archipelago, found partly in the plankton-samples of 

 Dr. Aurivillius and partly in a sample of shell-sand from 

 Java, brought home by the same scientist. The author states, 

 that the earlier lists of dlatoms from the same regions, viz. by 

 Dr. E. Lenduger-Fortmorel and by E. deWildeman, 

 are erroneous, either the determinations may be false or the 

 samples and slides are contaminated by materials of foreign 

 origin. Therefore he considers his list to be of a certain im- 

 portance for the knowledge of the dlatoms from the Malay 

 Archipelago. He mentions 268 species or varieties. 



After the lists of organisms the author gives some „systematic 

 notes", the main part of these being descriptions of new Cope- 

 pods; but also some new dlatoms are described, and notes on 

 little known species are added. The plate VIII illustrates the 

 diatoms. 



Following new species are mentioned: Chaetoceras Aiirl- 

 vlllll n. sp., C. calviis n. sp., Fragllaria AurlvlllU n. sp., 

 Streptotlieca maxlma n. sp., Thalassloslra AurlvlllU n. sp. from 

 the plankton; Fragllaria (?) rhomblca n. sp., Llcmophora Aurl- 

 vlllU n. sp. and Sceptronels AurlvlllU n. sp. among the coast- 

 species. C. H. Ostenfeld. 



Cleve, P. T., Additional notes on the seasonal distri- 



bution of Atlantic Plankton organisms. Göteborg 



1902. 8». 51 pp. 



In 1900 Professor Cleve published a treatise on „The 



seasonal distribution of Atlantic Plankton Organisms" (Gödeborg 



1900. 368 pp.), based upon numerous plankton-samples from 



the Atlantic Ocean in the years 1898 and 1899. When this 



treatise was in the press he received several sets of samples, 



collected in 1899, which, after examination, yielded a consi- 



derable addition to our knowledge about the distribution of the 



Atlantic plankton organisms, especially of the southern hemi- 



sphere. The samples were mostly procured by vessels of the 



Dutch Navy, and further a series of samples from the Azores 



was received. 



