PAPERS ON BOTANY 251 
On living leaves of Clusia gundlachii, (Stahl) in Porto Rico; 
Maricao, 286 (type) ; 809, 7136, 7482, 8829, 8849, 8906. 
This species differs from Mycosphaerella clusiae on Clusia 
rosea in the appearance of the spots and in the larger spore 
measurements. 
V.—MYCOSPHAERELLA MAXIMA SP. NOV. 
Spots amphigenous, irregular, pale-salmon in color, con- 
spicuous, bounded by a narrow dark brown line,, several on a 
leaf, often becoming three or more centimeters in diameter, 
sometimes confluent. Perithecia epiphyllous, subepidermal, 
ininute, thickly scattered over spot, ostiolate, 80-90 microns. 
No paraphyses. Asci oblong or slightly narrowed above, 55- 
60x15-17 microns. Spores inordinate, hyaline, narrowly ob- 
long, uniseptate in the middle. 28-35x3.5-4 microns. 
On living leaves of an undetermined host, probably a mem- 
ber of the Rubiaceae in Porto Rico: Maricao, 754 (type. ) 
VI.—MYCOSPHAERELLA PERSIAE Sp. nov. 
Spots amphigenous, on upper side of leaf covered by a cin- 
€reous, papery membrane, without a _ limiting border, 
on the lower side brown, bordered by a narrow line 
cf darker brown, very irregular, both in size and outline, 
a single spot often covering several square centimeters of the 
leaf surface; the thin membrane finally flaking off and leaving 
a spot on the upper surface which closely resembles the one on 
the lower side, Perithecia epiphyllous, somewhat flattened, 
black, scattered, rather numerous, 70x80-100 microns, ostio- 
late. Ostiole very slightly raised, 15-25 microns in diameter. 
No paraphyses. Asci oblanciolate or narrowly clavate, 45-55x 
7-9 microns. Spores hyaline, uniseptate, cylindrical, scarcely 
constricted at the middle, mono or subdistichous, slightly point- 
ed at the ends, 12-13x3-4 microns. 
On living leaves of Persea americana, Mill., in Porto Rico: 
Maricao, 753, 4486 (type) ; 4809; Rio Piedras, 2176; 2501; 
San German, 5797; Dos Bocas below Utuado, 6601. 
This species differs from Mycosphaerella exutans on Persea 
carolinensis which has minute spots with unequally uniseptate 
spores. 
