622 SUMMARY OF CURRENT RESEARCHES RELATING TO 



is this the case with II. membranami, which, after being united 

 (erroneously) with Rhodymenia Jimbriata, fell into neglect. Rhodophyllis 

 membranacea is abundant on the coast of New Zealand ; but Rhodymenia 

 jimbriata does not occur there at all. 



Criticisms on Calcareous Algae.* — M. Foslie criticises severely and 

 in detail F. Heydrich's paper on Sphcwanthera iiehmoides.\ For instance 

 he strongly disputes Heydrich's assumption that Millepora calcarea Ellis 

 and Soland. is a form of Lithophyllum incrustans, and questions whether 

 the type figured is a coral at all. Again he repeats his already published 

 opinion that Splicer •anther -a is not a valid genus, but a compound of 

 Lithothamnion Philippii and Goniolithon mamillosum. And he adds 

 that Lithothamnion lichenoides placed by Heydrich in Sphceranfhera is 

 actually the type of Lithothamnion as now understood by algologists. 

 Further he cites two series of synonyms referred by Heydrich respectively 

 to Lithothamnion Patena and Lithophylhim incrustans, and shows that 

 such a grouping of species is not warranted by facts. 



H Algae of Swedish West Coast. J — H. Kylin gives a list of 47 marine 

 algae collected on the west coast of Sweden, partly by himself, partly by 

 the late F. R. Kjellman. They are mostly epiphytic on other alga3 or 

 on zoophytes, or are endophytic species. Notes on their fruiting season 

 are added. 



Algae of G;ermany.§ — E. Lemmermann, in continuing the mono- 

 graph of the algae in the Kryptogamenflora der Mark Brandenburg, 

 treats of Class II., the Flagellatae. These are divided into seven orders 

 — Pantostomatineae, Protomastigineae, Distomatineae, Chrysomonadineae. 

 Cryptoinonadineaj, Chloromonadineae, Euglenineae. Each of these is 

 treated in turn, descriptions of the respective orders, families, genera, 

 and species being supplied ; and reference is facilitated by the use of 

 keys and by the figures grouped in the plates. The blood-parasite 

 Trypanosoma, one tropical species of which causes sleeping-sickness, is 

 classed under Protomastigineae. 



Algal Periodicity.|| — H. B. Brown gives an account of the periodicity 

 of alga} in certain ponds and streams at Bloomington, Indiana, which he 

 kept under close observation in 1906-7. The flora of each was analysed 

 twice monthly. The Conjugates, especially Spiroyyra, were the most 

 abundant algae. Zygnema ranked next. Moayeotia was less abundant. 

 Six genera of Desmids were found, Closterium being the most plentiful. 

 The (Edogoniales w T ere plentiful, and the Chaetophorales fairly abundant. 

 Cladophorales and others were also found. Notes on the behaviour of 

 the different algae are given ; and the following conclusions were 

 reached. (1) Under steady normal conditions an alga continues to 

 grow in a healthy vegetative state throughout the year. (2) A sudden 

 change in external conditions checks the vegetative growth and tends to 



* Beih. Bot. Centralbl., 2te Abt., xxiii. (1908) pp. 266-72. 



t Op. cit., 2te Abt., xxii. (1907) p. 222. 



t Arkiv f. Botanik, vii., No. 10 (190S) 10 pp. (fig.). 



§ Leipzig : Bomtraeger, 1908, iii. beft 3, pp. 305-196 (pis.). 



|| Bull. Torrey Bot Club, xxxv. (190S) pp. 223-48. 



