ZOOLOGY AXD BOTANY, xMICROSCOPY, ETC. 6^ 



appears to weaken the growth of the plant, this latter being much dwarfed 

 and bearing a shortened truncate capsule with an operculum, not rostrate 

 but obtuse, with a few apical papillse. 



Nematode-Galls.* — E. Marchal records an instance of deformation 

 caused by nematodes in the stems of a pot-cultivated specimen of Loplho- 

 colea hidentata. 



Thallophyta. 



Alg'se. 



(By Mbs. E. S. Gepp.) 



British Algae. t — A. P. Bradshaw publishes some short notes on the 

 study of the British Algse, with the intention of helping amateurs who 

 know nothing of the subject and wish to have some general information. 

 He defines shortly the three main groups, deals with their zonal distribu- 

 tion and describes the structure of certain algge in general terms. A 

 short account of the reproduction of Ectocarpus siUculosus is given, and 

 other points of structure and habit are treated in a popular style. 



Algae formations of the Faeroes. J — F. Borgesen occupies the sixth 

 number of series -4 of Vegetationsbilder with six very good photographs 

 of marine algae taken in the Faeroes. They represent two species of 

 Fucus on steep rock faces, several species of red algse in the same situa- 

 tion, plants of Hlmanthalia lorea and some red algge fringing the edge 

 of rocks, a bed of Lam'maria dlgitata and Alaria esculenta at dead low 

 tide, and a mass of Fucus vesiculosus and Ascophyllum nodosum clothing 

 the side of a rock. The plates of Himaiithcdia and other brown algae 

 are remarkably clear and good. A preface to the plates deals with the 

 conditions of algal life at the Faeroes, such as temperature, salinity, ebb 

 and flow of the tide, strength of the waves, temperature of the air, etc. 

 In general the conditions are such as to promote a luxuriant growth of 

 algae down to a depth of 40 metres. 



Swedish Algae. § — H. Kylin records the occurrence of Polysiphonia 



fastigiata on the west coast of Sweden, where it was previously unknown. 



It was growing on Ascoplujllum nodosum ; and itself bore the following 



epiphytes : — Choreocolax Polysiphonm, Myrionema CorunncBi?), Isthmo- 



plea spluerophora, Ulothrix Jiacca, and Monostroma Grevillei (?). 



Algae of the Mediterranean. || — -F. Ardissone completes his revision 

 of the Mediterranean algtB in the present paper, which contains a list of 

 the Melanophyceae, Chlorophyceae, and Cyanophycete. Besides alterations 

 in the disposition of the families, the present revision shows not a few 

 changes in the arrangement and limitations of certain genera, notably 

 in Ectocarpacete and Oscillariaceae. 



* Rev. Bryolog., xxxiii. (1906) p. 106. 



t Annnal Report and Trans. Manchester Microscop. Soc, 1905 (issued 1906) 

 pp. 56-60. 



X Vegetationsbilder. Edited by Karsten and Schenk, series 4, No. 6, 1906. 



§ Bot. Notiser, 1906, pp. 245-7. 



II Rend. R.^Ist. Lombardo, series 2, xxxix. (1906) pp. 156-76. 



