204 ~ Mr. J. Miers on the genus Browallia. 
just forming ; k, outer wall of last-formed cell exhibiting bud in 
second stage of development ; /, lining membrane of ditto ; m, bud 
as it appears at first. 
Fig. 6. Terminal cell exhibiting bud in third stage of development: a, outer 
wall of cell; 5, linmg membrane; c, bud; d, tentacular sheath ; 
e, polype-retractors just making their appearance. 
Fig. 7. Enlarged view of a portion of the polype of P. procumbens exhibit- 
ing reproductive system : a, oesophagus ; , stomach ; ¢, intestine ; 
d, supposed ovary with the egg, e, attached ; f, membranous en- 
velope of the egg; g, lower filament supposed to be connected 
with the reproductive system. 
Puate V. 
Fig. 1. Polypidom of Paludicella procumbens slightly enlarged. 
Fig. 2. A portion of ditto much enlarged, exhibiting two or three series of 
cells. 
Fig. 3. A patch of Plumatella Allmani magnified two times, comprising se- 
veral polypidoms. 
Fig. 4. Two or three polypidoms of ditto more highly magnified, exhibiting 
the polypes exserted and the envelope of the origimating egg a a. 
Fig. 5. A single cell of same still more highly magnified: a, keel or ridge 
: on the upper surface of cell. 
Fig. 6. Plumatella punctata five or six times magnified, exhibiting polypes 
exserted : a, envelope of originating egg. 
Fig. 7. Three cells of ditto more highly magnified and more produced than 
usual, with the polypes exserted. 
XIX.—Contributions to the Botany of South America. 
By Joun Mrurs, Hsq., F.R.S., F.L.S. 
[Continued from p. 35. ] 
BrowAL.LLia. 
Tue affinity of Browallia with Salpiglossis is sufficiently evident, 
but in many respects it approaches very closely to Petunia. In 
the tabular arrangement suggested on a former occasion (hu). 
op. iii. p. 172), Browallia was associated with the Salpiglossidea, 
on account of the apparent zstivation of its corolla, combined 
with its other characters. I regret very much, that since my 
attention has been directed to this investigation, I have had no 
opportunity of examining a flower in its living state, as by this 
means only could its precise mode of prefloration be ascertained : 
it is certainly not imbricative as in Franciscea, but is either re- 
plicative or reciprocative, as in Petunia or Salpiglossis ; judging 
from its appearance after bemg pressed and dried, it seems to 
be rather that of the last-named genus. The following generic 
features have been derived wholly from an examination of dried 
specimens :— ' 
Browauui1a, Linn. (char. reform.) —Calyx tubulosus, subeylin- 
dricus, 10-nervis, 5-dentatus, dentibus inequalibus, 3-nerviis, 
