AVICENNIA. 195 
The communicating process is at this time easily separa- 
e. 
There is no change of direction in the embryo, the pro- 
trusion being effected by the cotyledons, all that is required 
" isacertain degree of obliquity as regards the nucleus or 
else they would pass it. 
On a transverse section, have I seen in the placenta the 
dense central part with a tendency to be 4-lobed, but even 
atalater period, nothing like a section of the communi- 
cating posterior tube was observed. 
It follows hence that the chief anomalies are the formation 
of the albuminous tissue outside the sac of the embryo, 
the penetration of this by boyau, the protrusion of the albu- 
minous mass so formed, and the subsequent protrusion of 
the cotyledons. 
The unique? ones are the formation of the albumi- 
nous mass outside the sac of the embryo, tho’ the embryo is 
formed within the sac! and secondarily the protrusion of 
the cotyledons, the radicle remaining enclosed. Also the 
deposit of albuminous tissue on a sac, internal to the nu- 
cleus, and the laterality of the posterior extension. 
To be carefully examined again, particularly with reference 
to the early state of embryo sac, the extent of the posterior 
Communication, and to the embryo just before the cotyle- 
n8 protrude. 
l. Verbenacee sp. Pl. CCCCXLVI. 
Calyx tubulosus 5-dentatus, denti postica minore persistens. 
Cor, infundibulif. subregularis tubo subgeniculata immulat. 
- inclusa sessilia, inferiora (vel his inter lobos labii 
Inferiofis) superiora et majora. 
cm capitatum, Nuces 4, extus venosz, intus verruco- 
Inforescentia spicata, flores 1-bracteata. 
