390 Chandler. — A Study of Sequoia and A thro taxis. 
have a membranous, puckered wing, whose surface is formed of large, 
inflated, oblong or polygonal cells. Only near the margin are their longer 
axes parallel to the lateral edge of the wing, elsewhere they are inclined 
obliquely to it ; thus they are arranged in lines which sweep transversely 
across the wing, meeting the edge of the embryo at an angle of about 50° 
(Fig- 5, b). 
The work of Mr. and Mrs. Clement Reid has shown that seed character 
is an admirable generic guide, and in the present instance the seed 
characters are so distinctive that, had seeds alone been available for study, 
I should unhesitatingly have assigned the fossil to Sequoia ; but when, as 
in this case, evidence from other organs all points in one direction, the case 
for Sequoia appears to be indisputable. 
This work was made possible by a grant from the Scientific and 
Industrial Research Department. 
With great pleasure I acknowledge my debt to Mrs. Reid, whose 
experience and collection of seeds have been freely placed at my disposal, 
and who has also given valuable help and criticism. 
I would also thank the Director of the Royal Gardens, Kew, for kindly 
lending herbarium sheets of Athrotaxis. 
