Palaeontologie. — Algae. 
185 
The third portion of the paper traces the origin of the typical 
Angiospermous flower from that of the hypothetical Hemiangiosperm. 
The first Step in the immediate evolution of the Angiosperms was 
the transference of the pollen-collection mechanism from the ovule 
to the carpel or carpels, with consequent localisation of the stigmatic 
surface. The consequent changes in the gynoecium, androecium and 
perianth are discussed. Sections of the paper are devoted to the 
origin of the Angiospermous type of foliage and to the origin of 
Monocotyledons. The latter are regarded as having been derived at 
an early period from the Dicotyledons. 
The last section of the paper discusses entomophily. The authors 
hold that it was a radical change in the method of cross-fertilisation 
which called the Angiosperms into existence, and that change was 
the general adoption of entomophily in conjunction with a trans¬ 
ference of the pollen-collection mechanism from the ovule itself to 
the carpel, and the closure of the megasporophylls. 
The paper concludes with a summary, a table of Angiospermous 
relationships, and a full bibliography. Arber (Cambridge). 
Dunstan, W. R. et T. A. Henry. Le glucoside cyanogeneti- 
que du lin. (Bull, de l’Acad. roy. de Belgique [Classe des Scien¬ 
ces]. N°. 7. p. 790—793.) 
Apres avoir montre en 1903 que les feves de Phaseolus lunatus 
contiennent un glucoside cyanogenetique, auquel ils ont donne le 
nom de phaseolunatine, ces auteurs ont trouve en 1906 que le glu¬ 
coside retird du Lin par Jorissen et Hairs et denomme par ceux-ci 
linamarine des 1891, est identique ä la phaseolunatine. Ils ont pro- 
pose en 1906 de remplacer le nom de linamarine par celui de pha¬ 
seolunatine parce que, au moment oü ils ont isole et determine la 
Constitution de la phaseolunatine, son identite avec la linamarine ne 
pouvait pas etre affirmee. Cette note est une reponse ä celle par 
laquelle Jorissen revendiquait la priorite pour le nom de linamarine, 
et qui a ete resumee ici. W. R. Dunstan et T. A. Henry estiment 
que la description donnee par Jorissen et Hairs n’etait pas complete, 
que la question de nomenclature est „d’une importance tout-ä-fait se- 
condaire” et que, puisqu’ils en ont donne une description complete, 
on devrait garder le nom de phaseolunatine. Henri Micheels. 
Griggs, R. F., Cymathere, a kelp from the Western coast. 
(The Ohio Naturalist. VII. p. 89—96. Plate 7 and a text figure. 
March, 1907.) 
Cymathere tviplicata is an inhabitant of relatively quiet water 
just below low tide mark. It reaches a length of 4 meters but is 
usually smaller. The fruiting areas develop late in the summer in 
a triangulär patch at the base of the blade. The paraphyses are 
filiform, not clavate, which in dicates that the plant belongs nearer to 
the Phyllariae than the Laminariae. There are poorly developed 
mucilage ducts in the lamina but none in the stipe. The pithweb is 
very simple and poor in conducting elements, as in Renfrewia. The 
embryonic one-layered lamina persists for a longer time than in 
most kelps and remnants of it are found tili the plant is above 
20 cm. long. The young laminae are plane but become three- or 
even four-ribbed when mature by folding and thickening of the 
original lamina. 
