216 Dr. Greville on some new species of Sargassum. 
ture and in the deep punctures on the elytra it is allied to Man- 
nerhermi, but is a larger and more robust insect; the thorax 
especially is much larger and broader at its basis. 
I captured three specimens near Dorchester in May 1848, a 
pair of which I gave to Dr. Schaum, who informed me by letter 
after his return to Germany, eo eoae species is unknown oe fe 
continent, <A ovey pee <2 ee a 
' Ramsgate, February 15, 1849. 
— —EEE -——__o —— — ee 
XXIV .— Alge Orientales :— Descriptions of new Species belonting 
tothe genus Sargassum. By R.K.Grevitiz, LL.D. se. 
[Continued from p. 109.] rr, 
[With a Plate.] a 
ff 
f 
WiGHTlANA. 
13. Sargassum obdvatum (nob.); caule subcompr¢sso ; foliis cauli- 
nis obovatis, obtuxissimis, subintegris vel obcure dentatis; aliis 
racemis intermixtis\lanceolatis, serratis; vegiculis subellipticis ; 
receptaculis minutis, \oblongis, cylindraceig, in racemis densis, 
rotundatis, pedunculati, aggregatis. | 
flab. in mari Peninsule Indz Orientalis ; ight. 
Root unknown. Plant prebably 1-2 
the fragment 1n my possession} which 
one of the primary branches on di 
somewhat compressed, as thick as lackbird’s quill, beset with 
numerous branches 2—3 inches lon hich are bushy with ramuli 
less than an inch in length on which\are found the racemes of 
m above an inch long, 
obovate, quite rounded at tl \.almost entire or ob- 
scurely repando-dentate, furmished with a néxve which disappears 
at some distance from the. 
often more or less serratéd, while those whic accompany the 
fructification are much synaller, linear-lanceolate, and sharply ser- 
rate. Vesicles attaining/the size of a small garden pea, varying in 
shape from elliptical to spherical, sometimes apiculat supported 
on acompressed stalk generally little more than a lineNn length. 
Sometimes, howéyer, one of the little lanceolate leaves 
converted into’ a vesicle, and the stalk is then proporwNjonally 
long. Recepfacles cylindraceous, oblong, much-divided and bed, 
forming a dense, roundish, very shortly pedicellated cluster a Kine 
or more/in length. Colour very dark red-brown. Substance 
thick ahd cartilaginous. 
feet long, judging from 
S apparently a portion of 
sions of the stem; this is 
Read before the Botanical Society of Edinburgh 11th Jan. 1849. 
