474 Alffae. — Pflanzenkrankheiten. 



"■ts 



Cotton, A. D., Marine Algae. Cläre Island Survey. (Proc. 

 Roy. Irish Acad. XXXI. 15. p. 175. 11 pl. 1912.) 



The report consists of three chief sections ä) an ecological 

 analysis and description of the Vegetation, b) systematic list and 

 critical notes, and c) a discussion on the phytogeophic features of 

 the flora. 



In the first section some alterations are suggested as to Classi- 

 fication. The terms "formation" and "association" are used in the 

 sense now generally accepted in England, and as outlined by 

 Mo SS in "Fundamental Units of Vegetation". Three marine forma- 

 tions are proposed namely 1) the rocky-shore formation, 2) the sand 

 and sandy-mud formation, and 3) the salt-marsh formation: besides 

 these two other types of Vegetation are provisionall}'^ distinguished 

 viz. that of river mouths, and brackish bays. In each formation a 

 number of associations and societies are recognised, and these are 

 described in the report at some length. 



In the systematic section 437 species and 36 varieties are recor- 

 ded. Three species Philothamnion lucifugum, Ascocyclus Saccharinae, 

 Calothrix endophytica, and two varieties Fucus vesiculosus var. 

 fnuscoides and Codium mucronatum var. atlanticum are new to 

 science. Follov^ring the list are a number of critical notes which 

 contain several revised descriptions and a few changes in nomen- 

 clature. 



The flora as a whole has a distinctly southern facies, but it is 

 peculiar in possessing a luxuriant growth of a few markedly 

 boreal plants. There is thus a distinct overlapping of northern and 

 southern elements in the marine flora as in the terrestrial. The 

 discovery of Codiutn mucronatum in the British Isles is very 

 remarkable since it is not known elsewhere in Europe nor in the 

 north atlantic. This and other cases of peculiar distribution are dis- 

 cussed in the last section. A. D. Cotton. 



Cobau, R., Altri cecidii della Valle del Brenta. (Atti Soc. 

 ital. Sc. Nat. LI. p. 31—67. 1912.) 



Deuxi^me contribution ä l'etude des Cecidies de la Vallee du 

 Brenta, qui comprend la description de 87 Zoocecidies et de 4 

 Mycocecidies. Formes nouvelles: Amarantus hypochondriacus {Aphis 

 Rumicis}), Carduus defloratus var. glaucus (aphide), Coronilla coro- 

 nata (cecidomyide), Cynodon Dactylon (hymenoptere?),£'n^^;'o« annuus 

 {Aphis Myosotidis}), Galium cruciata {Perrisia gallicola}), Hieracium. 

 porrifolium (Aulacidea Hieracii), Phyteuma ScheuchserO (coccides), 

 Polygonum Persicaria (nemathodes?), Rhamnus saxatUis {Trichopsylla 

 Walkeri), Salix hastata {Pontania proxima), Salix incana {Eriophyes 

 Salicis), Solidago virga-aurea (aphide). C. Bonaventura (Firenze). 



Houard, C, Les galles de l'Afrique occidentale fran- 

 Qaise. V. Cecidies nouvelles. (Marcellia. XI. p. 176 — 210. 

 1912.) 



Nouvelle contribution ä la connaissance des Cecidies de 

 l'Afrique occidentale frangaise, et description de Cecidies nouvelles; 

 l'auteur ne nomme pas l'organisme galligene. Loranthus lecardi 

 (insecte), Uvaria sp. (id.), Parinarium curatellaefolium (id.). Acacia 

 Adansoni (id.), Cailliea dicheostachys, Parkia [filicoidea] (insecte), 



