ZOOLOGY AND BOTANY. MICROSCOPY, ETC. 479 



necessity of studying the very variable forms of this genus at all times 

 of year, and during all the varying conditions that affect the stations in 

 which they grow — dampness and drought, varying richness of the 

 water, etc. He disagrees with the views of L. Loeske, who, he con- 

 siders, has gone too far in separating off from Drepanocladus his genera 

 Warnstor/ia and Limprichtia. Also he differs from Sanio's views as to 

 the section " binervia," and considers that some of the species are 

 closely related to Hypnum. Hypnum fertile is, he says, a Dr&panium, 

 and not a Drepanocladus. The groups of Dr&panocladus as arranged 

 by Roth are as follows : — (1) Vernicosus {Limprichtia of Loeske) ; 

 (2) Uncinatus (Sanionia of Loeske) ; (3) Sentmri ; (4) Aduncus (with 

 two new species) ; (5) Exannulatus ; (6) Fluitans (with one new 

 species) ; (7) Furcatus (with one new species). Several new forms are 

 described. 



In a subsequent communication the author states that he has 

 received further rich material from the same source, containing several 

 new forms, which he briefly describes. In consequence of the unusually 

 dry season new forms and varieties of D. capillifolius appeared, also a 

 very sturdy plant of the Exannulatus group, which he describes as 

 var. decurrens. D. furcatus — the connecting link between the Furcatus 

 group and Limnobium ochraceum — might just as well be referred as a 

 variety to the latter species. He records also the discovery of the first 

 sporogonium of Fontinalis seriata. 



Phascum lotharingicum, a New Species.* — A. Coppey describes 

 Phascum lotharingicum, a new species gathered in sandy fields near 

 Nancy and Luneville. It is distinguished by its very shortly rostellate 

 ovoideo-globose capsule borne on a sigmoid pedicel ; its short lobed 

 calyptra ; its globose echinulate spores ; its ramification ; its apical 

 leaves strongly papillose on each side above the middle ; and its concave 

 very carinate perichretial leaves which hide the sporogonium. The 

 author regards it as a widely distributed species which has been con- 

 founded with other species, and he shows how it may readily be distin- 

 guished from Acaulon, P. Floerkeanum, P. cuspidatum, P. rectum, 

 P. curvicollum, and P. dubium. 



Sphagnum subsecundum and its Allies.f — C. Jensen discusses the 

 subsecundum group of European Sphagnacese, and compares the views of 

 Warnstorf and of Russow. He follows the latter, but attaches greater 

 importance to the character of the stem-cortex. He gives a useful key, 

 based first on the presence or absence of pores in the branch-leaves ; 

 secondly, on the number of layers of cortical cells. 



Key to Orthotrichum.J — W. Krieger publishes a well-elaborated 

 key to the European species and forms of the genus Orthotrichum, em- 

 ploying, not the stomata, but other characters obvious to the naked eye. 



Calypogeia trichomanis and its Allies.§ — C. Meylan publishes some 

 further studies on Calypogeia trichomanis and its allied forms, especially 



* Rev. Bryolog., xxxvi. (1909) pp. 77-80. 



t Lotos, lvi. (Prag, 1908) pp. 234-8. J Torn, cit., pp. 317-23. 



§'Rev. Bryolog., xxxvi. (1909) pp. 53-8. 



