PAPERS ON BOTANY 181 
On Rhipsalis cassytha, Monte de Oro near Cayey, 5662 
(type). 
This fungus is remarkable for its very coarse, dark mycelium 
7-9 » in diameter, and for the manner in which the mycelium 
penetrates vertically through the thick cambial layer. 
Herpotrichia Fuckel. 
Herpotrichia diffusa (Schw.) Ellis and Ev. 
On cocoanut debris, Espinosa. (Stevenson) 2626. 
Rosellinia Ces. and de Not. 
Rosellinia subiculata (Schw.) Sacc. 
On rotten wood, Garrochales. (Stevenson), 2765. 
Rosellinia aquila (Fr.) de Not. 
On rotten wood, Rio Piedras. (Stevenson) 3355. 
CoRYNELIACEAE 
Corynelia Achar. 
C. clavata (S). Sacc. var: portoricensis var. nov. Fig. 5. 
Asci long pedicilled, 70 », sporiferous part 34-41x14 yp, bear- 
ing 1, 2, 3, or 4, mainly 2 or 3, spores which are 12-15 » in 
A striking feature is the narrow limits of the diseased area, 
which comprise a region consisting of only a few host cells. 
Cells within the diseased area, however, become completely 
filled with the rather fine, dark-brown mycelium. 
MycosPpHAERELLACEAE 
Mycosphaerella Johans 
Mycosphaerella maculiformis (Pers.) Schr. 
Sphaerella maculiformis (Pers.) Auer. 
On Inga vera, Jayuya, 5996, 
Spots sordid white, 2-4 mm. in diameter, bordered by a dark 
red to brown line. Perithecia numerous, scattered over the 
upper surface, subepidermal. 
Mycosphaerella clusiae sp. nov. 
