1904] SMITH: NUTRITION OF THE EGG IN ZAMIA 351 
In preparations the haustoria are often broken off (jigs. r and 
6), and in this condition they might be mistaken for material 
passing in large masses from the jacket cells into theegg. This 
condition resembles that shown by Ikeno for Cycas revoluta. 
Possibly his os may bear this interpretation; at least it would 
be worth while 
to re-examine 
Cycas with this 
in mind. 
It often hap- 
pS pens that the 
: 2 J * knob-like ends 
> ees: Se = —_—- xs 
of egg; 4,4',haustoria,the CUt in a longi- 
lower a tangential section tudinal tangen- 
of the knob-like end which tial plane. In 
such cases they 
containing cells outside Closely resemble 
Jacket; w, thick innerwalls nuclei oe 
of jacket cells (Ag 
and 5, hk’), oe 
then they might be mistaken for nuclei 
J w 
Fic. 6.— Zamia floridana. 
Streaming of cytoplasm toward 
passing bodily into the ese: Whether haustoria; ¢, peripheral portion 
Lene) 
such a mistake would be sufficient to of egg; J jacket cell 
explain Arnoldi’s account still remains thick imner walls of ‘etket 
t cells. 
0 be seen. 
No sieve plates or similar structures, as described by Goro- 
schankin, were observed in any of the preparations. 
LITERATURE CITED. 
1. ARNOLDI, W., Beitrige zur Morphologie der Gymnospermen. III, 
Embryogenie von Cephalotaxus Fortunei. Flora 87:46-63. 1900. 
rs IV. Was sind 
Beitrage zur Morphologie der Gymnospermen. 
die “Keimblaschen” oder Hofmeister’s “‘Kérperchen”’ in der Eizelle 
der Abietineen? Flora 87:194-204. 1900 
3. FERGUSON, MARGARET C., The development of the egg and fertiliza- 
tion in Pinus Strobus. Annals of Botany 15:435-479- és. 27-25- 1901. 
4. GOROSCHANKIN, J., Zur Kenntniss der Corpuscula bei den Gymnosper- 
men. Bot. Zeit. 41:825-831. 1883. 
