Botany and Zoology. 335 
adventive embryos in the manner above described. 
is, then, gives an explanatiun of the long-disputed partheno- 
genesis of Celobogyne, and therefore of the less notable instances, 
_ Parthenogenesis, it is then concluded, is only in appearance ; it 
is sometimes, and perhaps in all cases, “a prolification of the 
us. oO 
mbryo; also that it is not very rare, since the adventive 
or supernumerary embryos of various seeds are cases of this par 
thenogeny. 
ot the least interesting consideration is, that we have here a 
counterpart of what De Bary terms Apogamy,— instead of an 
cant narrowing of the Aiatus between vegetative and sexual repro- 
duction, which Mr. Darwin may turn to account. ; 
me applications of this new knowledge may be made. It is 
, han we are aware of may be 
Seemed to us the least improbable explanation, would now appear 
© be the one altogether probable. A. G. 
.2. Notes on Euphorbiacee. By Gzorcr Bentuam. (Extr. Jour. 
Linn. Society, No. 100, Dec., 1878, vol. xvii. pp. 185-267).—This 
thoughtful essay presents the general views attained to by Mr. 
Bentham on working up the genera of the great order Huphorbia- 
cee for the ensuing volume of the Genera Plantarum. eu 
* The number for February, 1878, p. 151. 
