ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 53 



and Ain Cheggag, a calcareous district. The total of llo species is 

 (•(imposed of S7 mosses and •_>:! liepatics, of which 29 mosses and six 

 hcpatics iii'e new for the district and one moss is new to science — Pol tin 

 i Gomphoneurori) Moureti Important notes are appended to some of the 

 species. The little known Bryum tophaceum is recorded from a new 

 station ; and in view of stunted specimens of B. gemmiparum gathered 

 at the same place, Corbiere questions whether these may not he biological 

 forms of B. tophaceum. Under Riella tieute/i is a note on Trabut's 

 claims that R. gallica and R. Battandi&ri, and perhaps also R. Notarisii 

 are to be referred to R. Reuteri. 



North American Hepaticae.* — A. W. Evans publishes a fifth 

 chapter of notes on North American Hepaticae, including seven species 

 new to the North American flora, namely, Metzgeria uncigera Evans, 

 Cepha/ozia affinis Lindb., Lejeunea spiniloba Lind. & Gottsche, Taxi- 

 Ujeunnea oMusangula Evans, Crossotol&jeunnea bermudiana Evans, Leuco- 

 lejeunea xanthocarpa Evans, Frullania cucullata Lind. & G-ottsche. 

 Three other species are recorded as with increased range of distribution. 

 ( Ytreful critical notes as to structure, nomenclature, history, etc., are 

 appended. 



Mexican Mosses. f — J. Cardot publishes a tenth article on prelim- 

 inary diagnoses of Mexican mosses. Though the death of Pringle in 

 1911 checked one source of collections, yet other travellers in Mexico, 

 namely Arsene and Nicolas. 0. R. Orcutt, H. Schenk, have sent their 

 collections for determination. Eleven new species and some varieties 

 are described and discussed in the present paper. 



Thallophyta. 



Algae. 



(By Mrs. E. S. Gepp.) 



North American Fresh-water Algae.} — E. X. Transeau publishes 

 descriptions of thirteen new species of fresh-water algae collected in 

 Illinois, namely Zygnema (1 species), Spirogyra (7 species and 5 varieties), 

 Mougeotia (1 species). (Edogonium (X species). He is engaged in 

 studying the periodicity of occurrence and reproduction of the local 

 algal flora. 



Batrachospermum.§ — S. R. Price discusses the peculiarities of some 

 forms of Batraehospermum collected near Cambridge. Some material 



* Bryologist, xvii. (1914) pp. 87-92. 



t Rev. Bryolog., xl. (1913) pp. 33-40. 



X Amer. Journ. Bot., i. (1914) pp. 289-301 (5 pis.). 



§ New Phytologist, xiii. (1914) pp. 276-9 (figs.). 



