ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 477 



Origin of the Bacillariae.* — A. M. Edwards discusses the origin of 

 the Bacillariae. He has searched shaded damp places for microscopic 

 algae, and states that he has found in such places Lyngbya muralis, and 

 seen it die down and grow into Spirogyra and Cladopliora. And he also 

 declares among them are particles as of clay, which turn into Monas lens 

 and then into Navicula quadrangula. He gives a list of diatoms found 

 in the sediment from a New Jersey stream-bed, allowed to stand in 

 the sun. 



Diatoms of the Jura Lakes.f — P. Prudent adds to his studies of 

 the diatomaceous flora of the lakes of the Jura, some lists of the species 

 collected by him in the Lac d'Aiguebelette and the Lacs de Saint Jean- 

 de-Chevelu. The former, situated at an altitude of 1260 ft. in Savoy, 

 furnished 117 species, two of which are new for the French flora, and 

 some of which are rare forms, and one of which is a marine species. On 

 the other hand the two lakes of Saint Jean-de-Chevelu produced 86 

 forms, one being new and another quite rare. 



Phytoplankton of Scotch and Swiss Lakes.:}:— H. Bachmann pub- 

 lishes a comparative study of the Phytoplankton of the lakes of Scotland 

 and of Switzerland. He visited Scotland in 1905 and published his 

 results in 1907. In the present paper he reduces his results to a more 

 compact form. He first treats in a general manner of the eight Scottish 

 lakes he visited — depth, dimensions, altitude, climate, temperature, and 

 their effects. He then shows in a table all the species of phytoplankton 

 found in each Scottish lake, indicating the comparative frequency. In 

 the following list he gives a systematic enumeration of the plankton 

 found in fifteen Swiss lakes. He then states the results that follow 

 from a comparison of the two floras. Some of the more interesting 

 species he discusses at greater length, giving for instance numerous 

 figures of CeraUum hirundinella from thirty Swiss lakes and from the 

 Scotch lochs. Chlamydomonas stipitata is a new species. Notes on the 

 vertical distribution and the annual periodicity of the phytoplankton 

 are added. 



Bach, E. B. — The Characeae of Michigan. 



[Partial list of the Characese of Michigan — 13 species ; and ' appeal to 

 botanists to collect more.] 



Michigan Acad. Sci., Ninth Report, 1907, p. 126. 



De Tioni, G. B. — Matteo Lanzi. 



[Born 1824, died 1908. Expert diatomist and mycologist ; residing at 

 Rome. Account of his life and work, with an enumeration of his pub- 

 lished papers.] Malpigliia, xxi. (1907) pp. 512-18. 



Lignieh, O. — Sur une Algue Oxfordienne (Glceocystis oxfordiensis sp. n.). 



[On Glceocystis oxfordiensis, a new species of fossil algre, found on a frag- 

 ment of Araucarioxylon in the Oxford Clay in Calvados.] 



Bull. Soc. Bot. France, liii. (1906) p. 5 (fig.). 



* Nuov. Notar., xix. (1908) pp. 79-S4. 



t Ann. Soc. Bot. Lyon, xxxi. (1906) pp. 51-8. See also Nuov. Notar., xix. 

 (1908) pp. 104-6. 



X Arch. Sci. Phys. Nat. Geneve, xxv. (1908) pp. 219-68, 360-72 (figs.-). 



