458 BOTANICAL GAZETTE [JUNE 
from the centrospheres found by Harper™ in the Ascomycetes, 
that in the present state of our knowledge they must be con- 
sidered to be distinct organs. What they are cannot be deter- 
mined till their origin and functions are better known. 
The further highly remarkable history of these organs the 
writer hopes soon to discuss, together with other details of the 
fecundation, in a future number of this journal. 
U. S. SuBTROPICAL LABORATORY, 
Eust 
Is, FLORIDA, 
Nore.— As this paper is passing through the press Mr. Webber sends word that 
he has discovered motile antherozoids in Zamia. They were found in a sugar solution 
and kept moving for two hours and forty-four minutes.— Eps. 
EXPLANATION OF PLATE XL. 
Zamia integrifolia Willd. 
Fig. 1. Pollen tube growing in the nucellus of the ovary ; Ag, pollen grain; 
vn, vegetative nucleus ; a, cell protruding from old pollen grain and contain- 
ing a free interior cell and nucleus; gc, generative cell. X 120. 
Fig. 2. Proximal cell shown at a in preceding figure. X 550. 
Fig. 3. Generative cell showing centrosome-like bodies with radiating 
filaments and kinoplasm. X 450. 
: FIG: 4. : Centrosome-like body during resting stage of nucleus, aaa 
varacicn, X 1800. 
Fr G. 5 Crutvectene: like aoe seen from above looking toward the nucleus 
showing kinoplasmic filaments connected with Hautschicht. X 600. 
_ FiG. 6. Diagrammatic outline of the upper end of nucellus, showing” the 
- proximal — of a ral ac tubes aged sie hiniad the cavity just above the 
; ‘ chamber ; f¢, escent 
+f) F , am = die r 
_sswinats, WALTER T— ean ‘Keguieden ae Kern- und Zelithetlung bei den 
. _ Jahr. wissenschaft. Bot. 30: 297. 1897. 
ae : 2 ae _ Fie. 7. - Gens Lane ellin ; ; ee f division, nin eng ; 
, Epvarp.— eden a detent bei Fucus. Jahr. : 
1. 1897. 
