PAPERS ON BOTANY 217 
Fig. 13. Sclerotium portoricense sp. nov. 
Sclerotium showing general appearance of sclerotium and the hairs, 
A bit of the surface layer showing reticulations. 
The hyaline internal cells showing thick wall and granular interior, 
Detail of one of the perithecial hairs. 
ao 7 
PARASITIC ALGAE 
Cephaleuros virescens Ktz. 
On Psidium guajava, Mayaguez, 155, 5819; on Myrcia de- 
flexa, Mayaguez Mesa, 7436, Maricao, 5056; on Cupania 
americana, 9144; on Nectandra patens, 1750; on Miconia lae- 
zwigata, Mayaguez, 7373; on Inga laurina, Willd., Jajome Alto, 
7023, Mayaguez, 7038, 7049; on Jambosa vulgaris, Afiasco, 
8743; on Artocarpus incisa, 196, 1222; on Coccolobis diversi- 
folia, Maricao, 8877 ; on Ocotea leucoxylon, Mayaguez, 7393; 
on Myrcia, Rosario, 4815; on Cestrum laurtfolium, Mayaguez, 
8158, 7088; on Dendropanax arboreum, Tanama Rio, 7955; 
on Somidesia lindeniana, Jajome Alto 8380; on Lasiacts 
swartztana, Jajome Alto, 5657, on Citrus sp. Mayaguez, 1017; 
