ZOOLOdY AND BOTANY, IMIGKOSCOPY, ETC.' 75 



und four Desmidiacete collected by the aathoi' in various localities in 

 Devon, and determined by him. Special notes are given on certain of 

 the more interesting records. E. S. Gepp. 



Alg-SB of the Zehlaubruch from a Systematic and Biological 

 Standpoint. — F. Stkixkoke {Schrift. Phi/sik.-okon. Gcs. Ivuiuijsber;/, 

 r.ilG. 56, lo.s pp., 32 figs, in text, \ pi. : see also Bot. GentraJbJ., 1918, 

 138. 18-22). The area in question is a tract of high moorland 

 ;)1 km. S.E. of Konigsberg in Prussia, which has been secured by 

 E. Prussian naturalists as a natural preserve. Tbe conditions are 

 primeval, and all formations, etc., are to be found undisturbed by 

 cultivation. The author visited the moor one to three times every 

 month from April, I'Jl-i, to June, 1914, and obtained very good results. 

 He records 270 species and 5U varieties of algte, together with their 

 morphological conditions, locaUty, and references in literature. Two 

 new genera and ten new species are described, besides a number of new 

 forms. Emjlena dongata Schewiakoff is new to Europe. Other records 

 are new to Germany, and many are rare species. The biological stand- 

 point is fully discussed. The conditions obtaining in the low moorland, 

 the intermediate, and the high are described, with the characteristic 

 algal features of each. Nutrition, periodicity, sexual reproduction and 

 other interesting subjects are fully dealt with. E. S. G. 



Plant-world of Two Moorland Areas in Upper Swabia, with 

 Regard to the Micro-org'anisms. — <i. Schlenker [Jaliresh. Vcr. 

 VaterJand. Naturk. Wiirttemberg, 1916,72, 87-120; see also Bot. 

 Ce/itralhl., 1918, 138, 2s). The areas examined are the Dornachried, 

 lying between Blitzenreute and Wolpertswende, 580 metres above sea- 

 level, in the Piavensburg district, and the Dolgenried, .575 metres above 

 sea-level, in the Saulgau district. The botanical records include Cyano- 

 plivceffi. Conjugate, Diatoms and Chloropliyce^. The paper appears 

 to be a preliminary one, but notes are appended on colouring, growth- 

 forms, etc. Many rare species are recorded, a considerable number of 

 alpine ones, and a few northern. E. 8. G. 



Fresh-water Algae from Caucasus and Turkestan. — K. M. STE0ii 

 (X/jt. Maij.f. Nat.-viiUnskab., May, 1919, 57, 1-1- pp., I pL). A list of 

 seventy-one species collected by Prof. N. Wille in 1897. The Desmids 

 are poorly represented. The predominating genus is ('ladophora. 

 Chroococcus and the OscillatoriaccEe are fairly well represented. Three 

 new varieties of Desmid species are described. E. S. G. 



Fresh-water Algae from Tuddal in Telemark. — K. M. Str0m 

 (iV/jt. Jlai/.f. Nat.-videnskab., June, 1919, 57, 53 pp., 3 pis.). A list of 

 species collected by the author in the summer of 1919 in the higher 

 mountains of S. Norway. The area investigated was that of which the 

 Tuddal hotel (3100 ft.) forms the centre, and includes the Gausta- 

 mountain (6000 ft.). It has a southern exposure, and most of it is 

 situated near or above the forest-limit. Three small lakes were examined 

 for plankton, which, however, proved of little interest. Only Sphsero- 

 cystis Schroeteri was really abundant. Elakatothrix f/elafinosa is recorded. 



