188 Transactions British Mycological Society. 
Herbarium Specimen t. MyCOSPHAERELLA CITRULLINA (reputed) 
on tomato stem, England (only pycnidial stage present). 
Pycnospores. Ejected in coils from ostiolum. Spores rather shrunken and 
mis-shapen through age. 
SHAPE. Very irregular. 
SEPTATION. Usually non-septate, about 20% 1-septate: usually con- 
stricted at the septum. 
GUTTULATION. About 50 % bi-guttulate. 
SIZE. 5 w-II wu x3 -4p non-septate. 9 w-10°5 u x3 u-4 me I-Septate. 
Herbarium Specimen 2. MYCOSPHAERELLA CITRULLINA (re- 
puted) as No. 1 (only pycnidial stage present). 
PycnosporEs. Ejected in coils from ostiolum. Hyaline. 
SHAPE. Irregular, often constricted at the centre, some slightly curved, 
some pear-shaped. 
SEPTATION. Usually non-septate, only about 5 % 1-septate. 
GUTTULATION. Occasionally indistinctly bi-guttulate. 
SIZE. 4 y-10 wu X 275 u—-3°5 uw non-septate. 8 w-10°5 wu x 3°5 uw I-septate. 
Herbarium Specimen 3. MYCOSPHAERELLACITRULLINA (C.O.Sm.) 
Gross., on water-melon stem (pycnidial stage) from America. 
PycnosporEs. Ejected in coils through the ostiolum, the pore of the ostiolum 
seemed narrower than usual and the spores were ejected in 
a coil only three or four spores wide. Spores hyaline. 
SHAPE. Very regular, cylindrical, rounded at the ends, very rarely 
slightly curved. 
SEPTATION. Usually non-septate, rarely faintly 1-septate (about 10 %). 
GuTTULATION. Indefinite. 
SIZE. 5 e-I4y.X2°5u-5m non-septate. 10 p—-13 wx 3°5 u—-4m I-Sep- 
tate. 
Herbarium Specimen 4. MyCOSPHAERELLA CITRULLINA (C. O. 
Sm.) Gross., on water-melon, same source as No. 3 (pyc- 
nidial stage). 
Pycnospores. Ejected in coils through ostiolum, hyaline. 
SHAPE. Cylindrical, rounded ends, sometimes slightly curved. 
SEPTATION. Always I-septate, occasionally 2-septate. 
GUTTULATION. Generally bi-guttulate. 
SIZE. 10°5 w-17 « xX 3-3°5m I-septate. I4py-I5"¢ x3'5u-4m 2-Sep- 
tate. 
Herbarium Specimen 5. MYCOSPHAERELLA CITRULLINA Gross. 
(reputed), on tomato stem, England; in the Kew Herbarium 
(pycnidial stage only). 
PycnosporeEs. Ejected in coils through the ostiolum, hyaline. 
SHAPE. Cylindrical, rounded ends, regular. Some very slightly curved. 
SEPTATION. Usually non-septate, about 20 % t1-septate, not egy 253 
at the septum. 
GUTTULATION. No guttules. 
SIZE. 4 u-IO 4 X2°5 u-3°5 Non-septate. 8-5 w-IOMx3u-3'5m@ I- 
septate. 
