Algae. — Eumycetes. 409 



Yendo, K., The Development of Costaria, Undaria, and 

 Laminaria. (Ann. Bot. XXV. 99. p. 691—715. 3 pl. July 1911.) 



After alluding to the work of other authors on the development 

 of the Laminariaceae and the view that the spores of Laminaria 

 are gametes and not zoospores, the author describes in detail the 

 development of Costaria Turneri, as well as of Undaria pinnatifida 

 and Laminaria sp., referring to some parallel accounts of other 

 genera previously studied. He treats first of the embryonal, and 

 then of the post-embryonal stages. His results are summarised as 

 follows: 1. The earliest stage of development of the sporelings of 

 the Laminariaceae investigated is a confervoid body growing by a 

 Single apieal cell. The confervoid body becomes monostromatic in 

 the next stage, with a monosiphonous stipe. The growth of the 

 monostromatic blade is initiated' by the tvvo cells situated side by 

 side at the same level beneath the apieal cell, the axis of the blade 

 passing between the two cells. 2. The monostromatic blade becomes 

 distromatic at its base; the monosiphonous stipe becomes polysipho- 

 nous at the same time. A new meristematic tissue begins to appear 

 at the transitional region between the blade and the stipe. 3. The 

 growth in length ass well as in breadth is due, at a certain period, 

 to both the apieal and the stipo-frondal growth. The apieal growth 

 is gradually retarded, and finally ceases. Erosion of the apex of the 

 blade follows next. 4. A Single precortical layer of large parenchy- 

 matös cells is generated at the transitional region between the 

 already existing two layers. The former soon becomes two-layered, 

 and adds to the number of its layers later on. Additions of layers 

 of cells are, as a rule, limited to, and beein at, the transitional 

 region. 5. The hyphal cells are generated as the precortical layer 

 becomes doubled, and the expansion of their distal ends into a 

 trumped shape takes place at the intercellular Spaces. 6. The rib 

 and the meridional region are formed by special thickening of the 

 cortical layers. The dorsiventrality of the lamina, if it exists, is 

 indicated simultaneously with the formation of such parts. 7. In 

 Undaria the mucilage glands are developed at an early stage, but 

 in Laminaria the appearance of the lacunae does not take place 

 before the blade has attained to a considerable length. 8. The 

 cryptostomata in the Laminariaceae are not generated from a single 

 initial cell. Each hair has its origin in an epidermal cell of equal 

 value, except that those in the middle develop earlier than the 

 peripheral cells. The paper is illustrated by three plates. 



E. S. Gepp. 



Anonymus. Funsn exotici. XIII. i'Kew Bull. Mise. Inform. N°. 4. 

 p. 189—191. 19120 



Of the fungi described two are considered injurious parasites, 

 namely Pheangella Heveae, Massee on Hevea in Nigeria, and 

 Colletotrichum necator, Massee, causing the fruit of pepper to shrivel 

 in Singapore. The other species described are: Lepiota aurea, 

 Massee (Queensland), Galer a delicatula Massee (India), Eutypa 

 gigaspora, Massee (Trinidad^, Hypospila Eucalypti, Wakefield 

 (Queensland), Colletotrichum Tristaniae, Massee (Queensland), 

 Exipula nigro-cineta, Massee Java). A. D. Cotton. 



