21G SUMMARY OF CUHREMT EKSEARCHES RELATING TO 



introduction, a number of special notes. About a score of the plants 

 are figured. Previous literature on the subject is very scanty, and the 

 species recorded very few. The bogs explored by the author are mostly 

 situated at altitudes of about 12-1300 ft. 



Meringosphsera.* — J. Schiller writes on new species of Jleringo- 

 sphsern and the deposition of silica in the membrane The species 

 described by Lohmann are discussed and partly figured. 31. mediterranea 

 was found by the author in the northern part of the Adriatic, descending 

 to 20 metres deep, sparingly distributed, living also in brackish water. 

 Two new species, M. Henseni and 31. triseta (with tliree bristles) are 

 described. The former is a stenohaline, purely salt-water species, the 

 latter a typical brackish -water form. 31. divergens at Messina is not 

 euryhaline. Wille places the genus in Chloropbycete (Oocystacea^). It 

 is the first green alga recorded with a siliceous membrane. Phseodactylum 

 Bohlin has a weakly silicified membrane and hardly belongs to the 

 Chlorophycese, The three species of 3Ieringosphsera recorded from the 

 Adriatic are described and figured. 



Algae of the Hawaiian Archipelagcf — V. MacCaughey has made 

 a study of the algae of the Hawaiian Archipelago, during a residence of 

 ten years in the islands, and publishes here his results. He quotes also 

 the records of other collectors, notably Tilden, Reed and Lemmermann. 

 In the first part of his paper he discusses coral reefs, Kauai and 

 Oahu, ecological zones on reef, tides, coralline algee, tidal pools, 

 coral reefs on other islands, Taro loi and rice-fields, ditches and flumes, 

 caves, mountain streams, hot springs and thermal waters, summit bogs, 

 brackish waters, halophytes, fish-ponds, phytoplankton, deep-water 

 forms, and endemism. In the second part he gives a list of all the 

 species recorded, with the habitat and geographical distribution. Items 

 of special interest, such as economic uses, are also noted. The chief aim 

 of the whole paper is to summarize available data, and thus to indicate 

 the need for more detailed and intensive investigations. 



Calcareous Algae from Malta. | — C. SamsonoflF-ArufTo publishes the 

 result of her examination of four samples of calcareous colonies of 

 Lithothamnion collected by Prof, de Stefani in different localities in 

 Malta, especially in the Helvetian limestone of the Middle Miocene. The 

 paper also contains an account of the first sample coming from Kala 

 (Gozo), in which the authoress recognizes the existence of Lithothamnion 

 intprmedium Kjellm., and of Goniolithon 3Iartellii Sams. 



Marine Algae of Denmark, §— L. N. Rosenvinge publishes the 

 second part of the Rhodophycete in his important monograph on the 



* Arch. Protistenk., xxxvi. (1916) pp. 198-208 (9 figs.). See also Bot. Centralbl., 

 cxxxv. (1917) p. 53. 



t Bot. Gaz., Ixv. (1918) pp. 42-57, 121-49. 



X Rend. R. Accad. Lincei, ser. 5, xxvi. (1917) pp. 564-9. See also Nuova 

 Notarisia, xxix. (1918) pp. 48-9. 



§ D. kgl. Dansk. Vidensk. Selsk. Skrift., ser. 7, vii. (Kjobenhavn, 1917) pp. 

 154-284 (2 pis. and 128 Sgs. in text). 



