226 ZOOPHYTES. 



with large and uniform lamella? strongly error occurs generally in their drawings, 



denticulate. The animals are sulphur- The A. dipsacea of Quoy and Gaymard 



yellow. The form of the tentacles given, (ibid. 210, pi. 17, figs. 1,2) is a different 



flat and lanceolate, is altogether impro- species, too imperfectly figured to be re- 



bable, and their distant arrangement in a cognised, 

 single series must be incorrect ; the same 



25. ASTR^A PORCATA. (Esper.) 



A. convexa, subglobosa, fusco-castanea ; polypis 5-6'" latis. Corallum 

 cellulosum, subrobustum ; cellis 3 4'" latis, subprqfundis, intus breviter 

 coronatis ; collibus fere planis, obsolete sulcatis, 1-2'" crassis ; la- 

 mettis regularibus, incrassatis, denticulatis, denticulis ad apicem sub- 

 tilissimis : transverse secto, stellis multiradiatis cum cettulis decom- 

 positis ; septis subcettulosis, cellulis minutis, sparsis. 



Convex, subglobose ; dark chestnut-brown. Corallum cellular, rather 

 firm ; cells 3 to 4 lines broad, rather shallow, short coronate within ; 

 ridges nearly flat, obsoletely sulcate, 1 to 2 lines thick; lamellae 

 even, incrassate, denticulate and very finely so at apex: in a trans- 

 verse section, stars many-rayed, with the cellules decompound ; 

 septa subcellular, cellules minute and scattered. 



Plate 11, fig. 5, polyps unexpanded, natural size; 5 a, profile of 

 the lamellae and ridges, natural size ; 5 b, same, enlarged ; 5 c, verti- 

 cal section of corallum, natural size ; 5 d, transverse section, natu- 

 ral size. 



East Indies. Esper. Tongatabu. Exp. Exp. 



The broad interstices nearly flat, and finely striated with an obso- 

 lescent sulcus, easily distinguish this species. The cells are about 

 half as deep as their breadth, and the lamellae which project a little 

 unequally into the cell are short appendiculate at base, and a little 

 thickened at the edges. 



Madrepora porcata, Esper, Pflanz. Fortsetz. i. 88, tab. 71, figs. 1-3. " Mad. com- 

 posita, globosa, stellis insequalibus, immersis, interstitiis planis, porcis radiantibus granu- 

 latis." Esper's figure represents well the specimen in the Expedition collections. 



Lamarck and Ehrenberg appear to have described other species under this name. 

 Lamarck's description (No. 7.) is as follows : " A. subglobosa, stellis inajqualibus, irregu- 

 laribus, oblongis, margine elevatis, interstitiis granulatis." Ehrenberg refers to Ellis's 



