frond is regularly reticulated in squares, which run in right
lines, each reticulation containing from one to four round
granules. In drying, it adheres incompletely to paper.
I quite agree with Dr. Greville in retaining this plant in
the genus Ulva, and considering it as a most distinct species.
It forms a most beautiful transition between the two genera
Ulva and Enteromorpha, agreeing perfectly in character
with neither, but in habit and fructification most nearly
allied to Ulva. The specimens from which the figure
was made were gathered in the Frindsbury Canal, near
Gravesend, in June 1832.—M. J . B.
