81 
pkysa is like Pemcillns , but tlie head consists of eight 
or ten small, ovate, simple vesicles. 
The Umbrella Coralline ( Acetabulum ) has a slender 
stem, which supports a thin, round head resembling a 
parasol, radiately striated, crenate at the margin, with 
a little smooth disc in the centre, surrounded by pores. 
No polypi are perceptible ; the radii of the head are 
hollow and, when recent, contain greenish granules, 
which induced Cavolini to consider this production as 
a vegetable, and M. Rafinau, in a memoir lately pre¬ 
sented to the Academy of Sciences of Paris, regards it 
as a conferva. 
The Corallines belonging to the third group re¬ 
semble the Ulrce of the botanists, but are covered with 
a calcareous coat, have a very short stem, and an ex¬ 
panded fan-shaped frond, marked with curved con¬ 
centric lines. 
Lastly. The Nullipara of Lamarck differ from the 
preceding by their fronds being much thicker, more cal¬ 
careous, and solid. They assume very various shapes, 
according to the circumstances under which they are 
found ; some covering stones like a crust, others form¬ 
ing lobes piled one on the other, whilst some assume 
the form of cylindrical, branched corals. From the 
latter they may always be distinguished, by having no 
cells containing polypes. 
On the Walls over the Cases round the Room, 
are placed a series of the horns of mammalia belonging 
to the family Bov idee. Amongst them are 
The Large Horned Buffalo ( Bos Arne ) of India; 
the African Buffalo; the Gour ( Bos Gour .) of India; 
the Musk Ox ( Bos Moschatns ), and some Horns of 
domestic cattle. Amongst the latter is a pair of horns 
from Africa of very large size, but exceedingly light, 
the core being very cellular; the Ibex ( Capra Iheoc ), 
from Egypt; the Wild Goat; the Angora Goat *, va¬ 
rieties of Sheep, especially the Four Horned Sheep; 
the Koba ( Antelope Senegalensis ), from the interior of 
Africa ; the Gazelle ( Antelope Dorcas); Indian Ante- 
g lope 
ROOM XI 
Nat. Hist 
