Periodical Literature . ciii 
Beport of the British Association for the Advancement of Science. 
( continued ). 
Second Report of the Committee for collecting information as to the 
Disappearance of Native Plants from their local habitats. 
Wager : Observations on the structure of the Nuclei in Peronospora and 
on their behaviour during the formation of the oosphere. 
Bennett, A. W. : The Antherozoids of Cryptogams. 
: A Hybrid Desmid. 
Lubbock : On the shape of the Oak-leaf. 
Pream : On the effects of Root-section on the Vitality of Pasture Plants, 
Beport and Transactions of the Guernsey Society of Natural Science, 
1889. (Guernsey, 1890.) 
Marquand : The Genus Isoetes. 
: The Flora of Herm. 
Beport and Transactions of the Penzance Natural History and Anti- 
quarian Society. (Plymouth.) 
1888- 89. 
Glasson : On the Occurrence of foreign Plants in West Cornwall. 
1889- 90. 
Marquand : The Flora of Guernsey compared with that of West 
Cornwall. 
Glasson : On the further Occurrence of foreign Plants in West Cornwall. 
Science Gossip. (London, 1890.) 
No. 302. A Double Sunflower (illustrated). ♦ 
„ 304. Illustrations of Vegetable Teratology (illustrated) (continued in Nos. 
305-9 and 31 1 ). 
, , 305. Cockerell: Weeds. 
„ Marquand : The Flora of Guernsey. 
„ 3°7- Cooke : Trees and Plants as agents of denudation. 
„ Wilson : Observations on Plants during the Mild Winter of 1889-90. 
„ 308. Hamilton : The Stomata in Orthotrichum (illustrated). 
„ Some East Sussex Plants observed from 1884-1890. 
„ 310. Hamilton: The Leaf-Glands of Pinguicula. 
„ 31 1. Ballantyne : Formation of Chlorophyll in Plants ( v . 312). 
„ Crepis taraxacifolia in Sussex. 
„ 312. Riches: Notes on Senna (illustrated.) 
„ Slater : The Evolution of Poisons in Plants. 
„ Grisel : Abnormal development in the essential organs of Papaver 
bracteatum. 
„ — - Weyman : Notes on Stellaria aquaiica , Scop. 
Transactions of the Botanical Society of Edinburgh. Vol. XVII, 
(Edinburgh, 1889.) 
Landsborough : Australian and New Zealand trees in Arran. 
Webster : Notes on three rare Carnarvonshire Plants. 
White : On a supposed new British species of Sagina. 
Simson : Notes on the finding of Trichomanes radicans in Arran in 
August, 1863. 
Landsborough : Additional note on Trichomanes radicans in Arran 
- in. August, 1 863. - . . 
• Elliot : Recent researches in regard to the Vegetable Cell- Wall. 
