CORALLIFERI. 447 
which are at the summit of the projecting parts, as in Oculina, or at 
the bottom of the cavities, as in Meandrina *, 
AGARICINA, 
The Agaricinz are composed of laminz hollowed on one side only 
by the valleys, which are themselves sulcated +. 
It is thought that we may approximate to the Madrepores in gene- 
ral, certain corals (Polypiers) or the Sarcinuna, Lam., composed of 
cylinders, a section of which forms stars, by reason of the projecting 
lamine which traverse the interiort. When there is a solid axis in 
the middle of these lamine we have Sryumya. These corals are per- 
haps as nearly related to the Tubipore. 
Mitiepora, 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. 
DisticopHora, Lam., 
Where the more strongly marked pores are arranged on two sides of 
the branches§. Of those in which the pores are equally distributed, 
we distinguish 
Mriiurpora, Lam., 
Or Milleporee proper, which are solid, and variously ramous |}. 
When their pores are not apparent, as is sometimes the case, they 
are called Nuturpora ¥, 
Then we have the 
Escuara, Lam, 
Which are furnished with flattened, foliaceous expansions **. 
Rerepora, Lam., 
Which are Eschare, pierced with meshes ft. 
Averona, Lamour. 
Escharz borne on an articulated stem; some are entire, and others 
pierced with meshes ff. 
* Mad. exesa, Sol. and Ell., XLIX, 3;—and the different Hydnophore of Fis- 
cher. 
+ Mad. cucullata, Sol. and Ell., XLII;—M. undata, Id., XL;—WM. complicata, 
LIGBs Sdlie Tey 
+ Mad. organum, L., Ann. Ac., I, iv, 6. 
§ Millepora violacea, Pall., Sol. and Ell., pl. XXVI, f. 3,4, copied Encyc. Méthed., 
Vers, pl. 481, f. 1. 
|| Détllepora alcicornis, Pall., Esper. I,v, 7,and Supp. I, xxvi;—J/ill. aspera, Lam., 
Esper, Supp., I, xviii;—M. truncata, Sol. and Ell., XXIII, f. 1—8. 
q Millepora informis, Ell., Corall., XXVII, f. c;—WM. calearea; Sol. and Ell, 
XXIII, f. 13;—M. cretacea, Id., Ib., 9; —A. alga, Id., Ib., 10, 11, 12. 
** Millepora foliacea, Ell. Corall., XXX, f. a;—Eschara lichenoides, Seb., III, c. 
10 ;—Esch. lobata, Lamour., add to Sol. and Ell., LXXII, f 9—19. 
tt Millepora cellulosa, vulgo, Mancheite de Neptune, Hil., Corall., XXV, f. d.; Dau- 
bent., Pl. Enl., No. 23, No. XXIII ;—4. reticulata, Marsill., Hist. Mar. pl. XXIV, 
f. 165, 166. 
t{ Adeona grisea, Lammouroux, Sol. and Ell., LXX, f. 5;—Ad. jfollicolina, Id. 
For these genera ag well as several others, established on consideration of but 
