CORALLIFERI. Ail 
tentacula, instead of forming rosettes round them, form a range along 
the sides of the valley. In some species they are totally wanting, 
the margin of each mouth being merely festooned(1). 
If the hills which separate these valleys are raised in leaves or 
crests, sulcated on both sides, it is a Pavonra. Mouths, usually 
without tentacula, are found at the bottom of the valleys(2). 
When these hills are conical or like projecting stars; we have the 
Hypnornora of Fischer, and the Monticunarra of Lamarck. ‘They 
should be distinguished according to the situation of their Polypi, 
which are at the summit of the projecting parts, as in Oculina, or at 
the bottom of the cavities, as in Meandrina(3). 
AGARICINA. 
The Agaricine are composed of laminz hollowed on one side only 
by the valleys, which are themselves sulcated(4). 
It is thought that we may approximate to the Madrepores in ge- 
_heral, certain corals (Polypiers) or the Sarcinuta, Lam., composed 
of cylinders, a section of which forms stars, by reason of the project- 
ing lamine which traverse the interior(5). When there is a solid 
axis in the middle of these lamine we have Srytina. These corals 
are perhaps as nearly related to the Tubiporz. 
Miuuepora, Lin. 
Where the stony portion is extremely various in form, and the sur- 
face merely marked with little holes or pores, or even without any 
apparent orifices. 
(1) Mad. labyrinthica, Sol. and Ell., XLVI, 3, 4;—M. cerebriformis, Seb., TI, 
exii, 1, 5,6;—M. dedalea, Id., XLVI, 1;—-M. meandrites, Id., XLVI, 1;—M. areo- 
lata, Id., XLVIII, 4, 5;—M. crispa, Seb., II, cviii, 3—35;—M. gyrosa, Sol. and 
Ell., LI, 2;—M. phrygia, Id., XLVUI, 2;—M. filograna, Gm.; Guall. Ind., XCVII. 
(2) Mad. agaricites, Sol. and Ell., 43;—Mad. lactuca, Id.. XLIV;—M. cristata, 
Id., XXXI, 3, 4, &c. : 
(3) Mad, exesa, Sol. and Ell., XLIX, 3;—and the different Hydnophore of Fis- 
cher. 
(4) Mad. cucullata, Sol. and Ell., XLU;—M. undata, Id.; XL;—M. complicata, 
FG sexli, le. 
(5) Mad. organum, L., Ann. Ac., I, iv, 6. 
