The Development of the Cystocarp in 
Rhodymeniales : 
II. Delesseriaceae. 
BY 
REGINALD W. PHILLIPS, M.A., B.Sc., 
Professor of Botany in the University College of North Wales , Bangor. 
With Plates XV and XVI. 
I N a former paper in the Annals of Botany (’97) I published 
the results of observations on the development of the 
cystocarp in certain species of the families Bonnemaisoniaceae, 
Rhodymeniaceae, Sphaerococcaceae, and Ceramiaceae. In 
still earlier papers (’95 and ’96) I had already described the 
structure of the ceramidia of several species of Rhodome- 
laceae. But the cohort Rhodymeniales as constituted by 
Schmitz (’89) contains yet a sixth family, the Delesseriaceae ; 
and in this paper I propose to give the results of an investi- 
gation of the structure of the cystocarp in the following 
species belonging to it : — 
Delesseria sanguinea, Lamx. 
Delesseria alata, Lamx. 
Delesseria Hypoglossum, Lamx. 
Delesseria ruscifolia, Lamx. 
Delesseria sinuosa, Lamx. 
Nitophyllum laceratum, Grev. 
Nitophyllum Hilliae, Grev. 
L Annals of Botany, Vol. XII. No. XLVI. June, 1898.] 
