Development of the Frond of Champia par- 
vula, Harv. from the Carpospore. 
BY 
BRADLEY MOORE DAVIS. 
With Plate XXI. 
HE investigation, the results of which are set forth in 
-L this paper, was begun at the suggestion of Dr. William 
A. Setchell, at the Marine Biological Laboratory, Woods Holl, 
Massachusetts, in the summer of 1891. The greater part of 
the work, however, was done in the botanical laboratory of 
the Leland Stanford Junior University at Palo Alto, California. 
To Dr. Setchell, and Dr. Douglas H. Campbell I wish to ex- 
press my thanks for many helpful suggestions which they have 
given me in my work. 
But little was known about the minute structure of this 
interesting alga, representative of a very curious group, until 
1886, when a memoir by Prof. F. Debray 1 appeared. In 1887 
a paper by Robert P. Bigelow 2 was published upon the same 
subject, written without knowledge of Prof. Debray’s memoir. 
Previously to this time, papers bearing upon the subject of 
1 Debray, F., Recherches sur la Structure et le Developpement du Thalle des 
Chylocladia, Champia et Lomentaria. Bull, scientif. du Depart, du Nord, ix. pp. 
253-266, 1886. 
2 Bigelow, R. P., On the Structure of the Frond of Champia parvula , Harv. 
Proc. Amer. Acad., vol. xxiii. p. hi, 1887. 
[Annals of Botany, Vol. VI. No. XXIV. December, 189a.] 
