On the Presence of Ham-agglutinins, etc., in the Blood. 531 
the oospore is mainly, if not entirely, provided by the generative cell. A 
resting nucleus is formed. 
The oospore elongates towards the top of the endosperm. The first nuclear 
division within it is followed by the formation of a centripetally developed 
wall which separates the upper “primary suspensor” from a lower terminal 
cell. From the latter are developed: (a) 24 cells which, surrounding the lower 
part of the primary suspensor, form with it the “secondary suspensor” ; 
(6) a terminal group enclosing a presumed embryonic plate of eight cells. 
The later stages of embryo-development have not been seen; they possibly 
occur, as in Gnetum, after the seed is detached from the plant. 
It is suggested that (1) The Gnetum-Welwitschia alliance has its origin in 
the same stock as the angiosperms, but separated from the angiosperm line 
before the carpel became the pollen-receiver; (2) Welwitschia is the most 
specialised living representative of the race to which it belongs. 
On the Presence of Haem-agglutinns, Hem-opsonins, and Hemo- 
lysins wm the Blood obtained from Infectious and Non- 
Infectious Diseases in Man. (Preliminary Report.) 
By Leonarp 8. DupcGEon, F.R.C.P. Lond. 
(Communicated by Prof. T. G. Brodie, F.R.S. Received July 31,—Read 
November 12, 1908.) 
(From the Pathological Laboratories, St. Thomas’s Hospital.) 
This preliminary report is for the purpose of introducing certain results 
which have been obtained by allowing normal and immune human serum to 
act in the presence of normal and immune blood cells.* 
These experiments have brought to light many interesting and important 
points in human hematology. The unlimited number of experiments which 
have been made on immune substances in the blood of the lower animals in 
comparison to similar investigations in man is most striking. It is necessary 
to draw special attention to the fact that the work of others has been either 
briefly referred to or omitted merely because this report is only intended to 
draw attention to the main facts met with in these investigations, avoiding as 
far as possible a detailed survey of the subject. 
* The expression “immune cell” and “immune serum” is used to designate the 
blood-cells and sera taken from cases of any general disease or condition. The term 
“immunity,” 7.e., is not confined, in this communication, to the series of phenomena 
resulting from bacterial infection alone. 
Zee, 
