o f a marine animal fubftance growing on a heath, many
miles from the fea, is, I hope, fully demonftrated.
XII. M I L L E P O R A . M I L L E P O R E C O R A L .
Animal crefcens plant ce
facie.
Stirps fixa, lapidea [co-
rallium) plerumque ra-
mofa, par is turbinatis vel
cylindricis per tufas,
Polypos Hydrceformes,
modo tubceformes (Dônati)
exferens.
This is an animal that grows
in the form of a plant.
The ftem is ftony, like coral,
and fixt by its bafe ; it is
moft commonly branched, and
full of top-fhaped or cylindrical
cells.
Thefe lend forth polypelike
fuckers, like the common
frelh-water one, and fome of
them Polypes o f a trumpet-
fhape (as Donati obferves).
The great Linnteus has with propriety brought the
llony Efcharas of other authors to this genus, to which
they naturally belong; and has conllituted a genus for
the foft membranaceous Efcharas, under the title of
Flullras, which I have called, in Englilh, Sea-Mutts, as
having that appearance when magnified.
The particular ftrudure of feveral fpecies of this genus
differs much from one another, as will appear from the
following divifions :
i) Thole that are almofl folid, whofe pores are fcarcely
vifible without being highly magnified ; but yet, on being
broken acrofs, difcover plainly a cellular ftrudure,
as has been Ihewn in V©1. 57. of the Philofophical Tranf-
3 adions,
adions, in the Millepora calcarea and Millepora lichenoides.
2) . Thofe that grow like the Flullra of Linnaeus, or
Efchara of fome authors, which have their cells difpofed
regularly, either in fingle layers as in fome, or in double
layers as in others, which laft are placed back to back,
like the cells in the combs of bees ; and thefe are either
in irregular undivided forms, or divided into branches.
The firft are the Millepora Spongites and M. foliacea, and
the fiecond kind are the Millepora taenialis and M. cervi-
cornis.
3) . Thofe that are compofed of clullers of cellular
pores, irregularly arranged, as in the Millepora pumicofa,
M. tubulofa, and M. rubra.
4) . Thofe that have fmall veffels running through them
lengthways in the infide, and which fend out pores only
on one fide, as in the Millepora foraminofa, M. reticulata,
and M. tubipora; or that fend out their pores in a
line on the margin, as in the M. violacea.
5) . Thofe that grow with the fame internal longitudinal
veffels, and fend out pores on all fides, as in the Millepora
truncata, M. alcicornis, and M. caerulea.
This laft Millepora casrulea has its pores larger than the
reft, befides they appear a little inclined to a ftellated
form; fo that it very properly joins this genus to the
Madrepora, whofe charadter is a Coral with radiated
pores.
[ 1 ] . M illepores th a t are almost solid.
x. Millepora calcarea. Chalky Millepore.
Millepora ramofa albif- This Millepore is extremely
fima folida dichotoma, ra~ white, folid, and dichoto-
S mulls
T AB.23.
Fig. 13.