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Show 410 POLYPI. appearance of having stars along the branches as well as at the end(l). In MADREPORA, Lam. Or his Madrepores proper, the whole surface is roughened by little stars with projecting edges(2). In his PooiLLOPORA we obaerve little impressed stars with pores in the intervals(3). In his SERIALOPORA, these little stars are disposed in linear ranges( 4). AsTRE.A, Lam. A broad surface, usually convex and excavated by crowded stars, each containing a polypus furnished with numerous arms, but on a single range, in the centre of which is the mouth( 5). When il is a plane surface, or forms broad laminre covered with stars on one side, it becomes an EXPLANARIA(6). The PoRITES are a sort of ramous Astrere(7). When this surface is marked with elongated lines, like little valleys separated by transversely furrowed hills, we have the MEANDRINA, Lam. In each valley, and from space to space, we find mouths, and the 1;-.M. ramea, Sol. and Ell., XXXVIII;-.M. fastigiata, Id., XXXlli;-M. angulosa, Id., XXXIV;-M. carduus, Id., xxxv, &c. (1) Mad. virginea, L.; Sol. and Ell., XXXVI;-M. hirtella, Id., XXXVII;-.M. axillaris, Id., XII, 5;-M. prolifera, Id., XXXII, 2, &c. (2) The species arranged by Lamarck in this subgenus are regarded by Gmelin, Esper, &c., as varieties of the Madrepora muricata, L.; Pol. and Ell., LVII, &c. (3) Mad. damicornis, Esper, XLVI;-Millepora ci£1"Ulea, Sol. and Ell., XII, 4. (4) Mad. seriata, Pall.; Sol. and Ell., XXXI, 1, 2. (5) Mad. radiata, Sol. and Ell., XLVII, 8;-M. annularis, Sol. and Ell., Llll, 1, 2;-M. rotulosa, Id., LV, 1, 3;-M. ananas, Icl., XLVII, 6;-M. plei'adu,Id., LUI, 7, 8;-M. stellulata, Id., LUI, 3, 4;-M. favosa, Id., L, 1;-M. denticulata, ld., XLIX, 1;-M. abdita, Id., L, 2;-M. siderea, Id., XLIX, 2;-M gala~, Id., XLVII, 7. (6) Mad. cinerascens, Sol. and Ell., XLIII;-M. aspera, Id., XXXIX. (7) Mad. poritu, Sol. and Ell., XLVll;-,M: folioaa, Id., Lll, &r,c. CORALLIFERI. 411 tentac. ula, instead of form'm g rosettes round the ~ the s1des of the valley I . m, torm a range along • n some spec1es th the margin of each mouth be' 1 ey are totally wanting, If the hills h' h mg mere Y festooned( I). w 1c separate these valle s . crests, sulcated on both 'd . . Y are raised in leaves or . Sl eB", lt lS a PAVONIA M Without tentacula are found t th b · ouths, usually W ' a e ottom of the v 11 ( ) hen these hills are conical or like . . a eys 2 . HYDNOPHORA of Fischer and th M proJectmg stars; we have the should be distinguished' a d~ ONTIOULARIA of Lamarck. They . ccor mg to the · t · f . which are at the summit of th . . Sl uatwn o their Polypi, the bottom of the c 't' ~ proJectmg parts, as in Oculina, or at av1 1es, as m Meandrina(3). AGARIOINA. The Agaricinre are composed of I . by the valleys, which are themsel amml re hollowed on one side only It is thou h ves su cated( 4) . . g t that we may approximate to th M d . neN~.l, certaxn corals (Polypiers) th S e a repores m ge-f \· or e AROINULA L o cyr~nders, a section of whl'cl ~ ' am.' composed · \ • l torms stars by re f . mg. la. mmre which traverse the m. t er1. or ( 5) ' Whea sonth o th.e project-axis m the middle of the se I amm. ce we hav.e ST n ere lS a solid are perhaps as nearly related to the ·r u bt' porre. YLINA. These corals MILLEPORA, Lin. Where the stony portion is extremely various . face merely marked with little holes or m form, an? the sur-apparent orifices. pores, or even Without any ~~) Mad. labyrinthica, Sol. and Ell. XLV . . cxu, 1, 5, 6;-M. dmdalea Id XLVI 1'· M. J, 3, 4,-M. cerebriformia, Seb. III Jat ' ., ' ,- meand. 't Id ' • a, Id., XLVIII, 41 5;-M. crispa Seb I.II .. "! u, ., XLVllT, 1;-M. area- Ell ., LI, 2 ;-M · phrygia, Id., XLV I•I I ., , CVUI 3-5·-M 2._M. lo ' ' · gyrosa, Sol. and (2) Mad. agaricitu Sol. and Ell ~ ' .Mt .fi 'g'l'ana, Gm.; Guall. Ind., XCVII Id., XXXI 3 4 o.c , ., ;- ad. lactuca, Id., XLIV·-M. cr' t t . I I I <A. • ' • l8 a a, ch(e3r.) Mad. exua, Sol. and Ell. , XLI X, 3;-and the different Hydnophora: of Fis- (4) Mad. cucullata, Sol. and Ell XLII Id., xli, 1, 2. ., ;-M. undata, Id., XL;-M. complicata (5) Mad. organum, L., Ann. Ac. ' I ' I·v , 6 . ' |