756 SUMMARY OF CURRENT RESEARCHES RELATING TO 



by the parasitic chroolepoid alga Gephaleuros Mycoidea, which lives on 

 the surface of tropical evergreen leaves. As the alga becomes older 

 it penetrates the cuticle and the outer epidermal wall, and even further 

 into the tissues, the host-cells affected becoming brown. The epiphyte 

 is transformed into the licben by the growth of hyphal fungi among the 

 algal cells ; its behaviour in regard to the leaf is the same as that of the 

 alga alone. On the whole the leaf is very slightly damaged. Fitting 

 discusses the climatic conditions that favour the growth of both algre 

 and lichens, and the kinds of leaves that are more especially the hosts of 

 Cephaleuros and Mycoidea. 



New Lancashire Cryptogams.* — J. A. Wheldon notifies the collec- 

 tion of several interesting specimens of lichens : a form of Lecidea 

 cupularis that is probably var. marmorea, as it has an entire margin ; 

 Arthopyreaia areniseda, a new lichen from the sea-shore near Formby ; 

 and specimens of Polyblastia hymenogonia, a rare plant found on a 

 mortared wall. 



Lichens of Minnesota. f — Bruce Fink has been for many years 

 investigating the lichen -flora round Miami, and he now publishes in 

 volume form the results of his work. In the introduction he gives an 

 account of the morphology, physiology, and ecology of the group, with 

 an historical sketch of work done on the lichens. The larger part of the 

 book is occupied by a descriptive catalogue of the plants found by him. 

 The book is well illustrated by photographic plates and figures. 



Lindau, G. — List of Lichens from the Sub- Antarctic Islands of New Zealand. 

 [Collected by the members of an expedition to these Islands.] 



Wellington, N.Z. : John Mackay (1909) ii. pp. 530-2. 



Lesdain, Bodly de— Lichens beiges rares ou nouveaux. (New or rare Belgian 

 Lichens.) 



[A number of species are listed, one new to science. Notes and occasional 

 descriptions accompany the species.] 



Bull. Soc. Boy. Bot. Bclg., xlvii. 1 (1910) pp. 39-45. 

 See also Bot. Centralbl., cxiv. (1910) p. 198. 



Stansfielp, A. — Flora of Todmorden, Order IV., Lichens. 

 [A number of interesting species are listed.] 



Lancashire Naturalist, ii. (1910) pp. 357-60. 



Mycetozoa. 



(By A. Lorrain Smith.) 



Mycetozoa of Pictou County.} — Clarence L. Moore has made a 

 study of these organisms in Nova Scotia during the summers of 1905-6, 

 and now publishes the result of his researches. He gives a popular 

 account of the history of the group and a description of the life processes. 

 He also presents the different forms of classification adopted by the 

 leading workers in this group. Finally he gives a descriptive list of 

 all the genera and species recorded from Pictou county. 



* Lancashire Naturalist, iii. (1910) p. 82. 



t Contributions U.S. Nat. Herb., xiv. 1 (Washington, 1910) xvii. and 269 pp. 

 (51 pis. 18 figs.). 



\ Proc. Trans. Nova-Scotian Inst. Sci. xii. (1910) pp. 165-206 (4 pis.). 



