446 POLYPI. 



OcuLiNA, Lam. 

 The Oculinae have very short lateral ramusculi, giving them the 

 appearance of having stars along the branches as well as at the 

 end *. In 



Madrepora, Lam., 

 Or his Madrepores proper, the whole surface is roughened by little 

 stars with projecting edges f- 



In his PociLLOPORA we observe little impressed stars with pores in 

 the intervals \. 



In his Serialopora, these little stars are disposed in linear 

 ranges §. 



AsTREA, Lam., 

 A broad surface, usually convex and excavated by croAvded stars, 

 each containing a polypus furnished with numerous arms, but on a 

 single range, in the centre of which is the mouthy. 



When it is a plane surface, or forms broad laminae covered with 

 stars on one side, it becomes an Explanaria^I. 

 The Porites are a sort of ramous Astreae**. 



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 

 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 f f. 



If the hills which separate these valleys are raised in leaves or 

 crests, sulcated on both sides, it is a Pavonia. Mouths, usually 

 without tentacula, are found at the bottom of the valleys jij;. 



"When these hills are conical or like projecting stars, we have the 

 Hydnophora of Fischer, and the Monticularia of Lamarck. They 

 should be distinguished according to the situation of their Polypi, 



M. ramea Sol. and EU., XXXVlll •,—M.fastigiafa, Id., XXXIII;— 3f. anrjulosa, Id., 

 XXXIV; M. carduus, Id., xxxv, &e. 



* Mad. I'irginea, L. ; Sol. aud Ell., XXXVI ;—xU. hirttUu, Id., XXXVII ;—iV. 

 axillaris, Id., XII, 5;— 3/. proUfera, Id., XXXII, 2, &c. 



-f- The species arranged by Lamarck in this subgenus are regarded by Gmelin, 

 Esper, &c., as varieties of the Madrepora muricufu, L. ; Pol. and EU., LVII, &c. 

 X Mud. daniicoi-nis, Esper, XLVI ; — Millepora ccerulea, Sol. and Ell., XII, 4. 

 § Mud. seriata, Pall.; Sol. and El]., XXXI, 1, 2. 



II Mud. rudiufa, Sol. and EU., XLVII, H;—M. annularis, Sol. and EU., LIII, 

 1, 2; — -1/. roluhisa, Id., LV, 1, 3; — .1/. ananas, Id., XLVII, 6; — M. pleiades. Id., 

 LIII, 7, 8;—.!/. stcllulata, Id., LIII, 3, i;—M. favosa, Id., L, 1 ;— 3/. denficula/a, 

 Id., XLIX, 1 ;— M. abdifa, Id., L. 2 ;— J/, siderea, Id., XLIX, 2;— iV. galaxea, Id., 

 XLVII, 7. 



«J Mad. cinerascens, Sol. andEU., XLIII;— J/, aspera, Id., XXXIX. 

 ** Mad. porites, Sol. and EU., X1>VII ;—.)/. /o/tos«. Id., LII, &c. 

 ft Mad. labijrinthica, Sol. and EU., XLVI, 3, 4 ',—M. cerehriformis, Seb., Ill, 

 cxn, 1, 5, 6;— 3^. dadulea. Id., XLVI, 1 ;— 3/. meandri/es, Id., XLVIII, 1 ■,—M. 

 areolatu. Id., XLVIII, 4, .5; — M. crispa, Seb., Ill, cviii, 3 — 5;— 3/. (j'jrosa, Sol. 

 and EU., LI, 2 ;— 3/. phnjyia, Id., XLVIII, 2 ;— 3/. filograna, Gai.; GauU. Ind., 

 XCVII. 



XX Mad. agariciles, Sol. and EU.,43; — Mad, hutuca Id., XLIV; — 3/. cristata. Id., 

 XXXI, 3, 4, &c. 



