568 ZOOPHYTES. 



Madreporaarenosa( l .),'L\\in.,e&.x\{., 1276; Forties arenacea, Lamk., ii. 435, No. 4. 



" M. composita, stellis contiguis, planius- , Blainville, Man., 395. 



culis, subarenaceis." 



The Mad. Forties arenacea, of Ehrenberg, is described as follows : " Quadrilinearis, 

 lineam alta, suborbicularis, effusa, incrustans, simplex, membranacea, stellis contiguis, 

 J'" latis, immersis, interstitiis spinuloso-hispidis (detritis granulosis?). In Pinna turgida 

 Maris Rubri. An pullus alius?" Gen. Ixx., sp. 20. A Manopora? 



NOTE. The Madrepora punctata, of Linnaeus, is an imperfectly described species, 

 possibly of some other genus. It is stated to come from the European Ocean, and is de- 

 scribed as follows : " M. composita, punctis stellaribus confertis, conflatis e punctis denis." 



The M. punctata, of Esper, tab. 70, is a true incrusting Porites, with shallow cells, 

 and wide granulous interstices. It comes from the Moluccas. 



The M, Forties punctata, of Ehrenberg (Gen. Ixx., sp. 17), appears to be a different 

 species, having much resemblance to the P. lichen. The following are some of its 

 characters : " Stellis semilinearibus, margine non lamellosis, interstitiis venoso-turgidis, 

 poroso-punctatis, denticulis nullis, stellularum lamellis basi denticulo columellam tenuem 

 punctiformem reddente auctis." " An. M. Porites conglomerata juvenilis ?" Locality 

 unknown. 



M. Forties arnuita, H. and Ehrenberg (Gen. Ixx., sp. 19): "Pollicaris, effusa, in- 

 crustans, stellularum semilinearium interstitiis scabris, nee lamellosis, singulo stellula- 

 rum margine, dente crenato armato, columellce vestigio obsolete." Red Sea. Probably 

 a Sideropora. 



M. Porites stromatopora, H. and Ehrenberg (Gen. Ixx., sp. 21) : " Semipedalis, effusa, 

 2" alta, stratum super stratum exstruendo pulvinata, stratis horizontalibus, I'" altis, dis- 

 cretis distinctisque (hinc exesa margine scalariformis evadit), stcllulis singulis linea inino- 

 ribus, parum profundis, lamellis 12, subsequalibus, ad centrum usque productis, interstitiis 

 stellularum contiguarum minimis porosis." Locality uncertain. A Manopora near the 

 effusa? 



GENUS II. GONIOPORA. QUOY & GAYMARD. 



Poritidce arrecto-glomeratce, lobatce ; polypis l6-24:-tentaculatis, 1-2'" 

 latis. Corolla omnino kviter porosa ; cellis subprofundis, aut super- 

 faialibus, intus granulosis. 



Erect glomerate, and lobed ; polyps with 16 to 24 tentacles, and 1 to 

 2 lines broad. Coralla throughout light porous; cells scarcely as 

 deep as their breadth or superficial, granulous within. 



The Goniopors resemble the Porites in habit and texture, but are 



