144 



MADREPORARIA. 



it is the same, and why it should suddenly find its way into specimens of Stony Corals, also 

 whether it only attacks stray specimens, or is normal to certain varieties, are points to be 

 investigated. In Vol. I. p. 47 of this Catalogue {Madrepora) Brook seems to have regarded it 

 as purely accidental, for one of the " species " accepted by him, with the suspicious name 

 " multiformis " (Ort.), included a few blue specimens, and further the specimens labelled by 

 Brook Mad. secale are also blue and white mixed. In neither case did he mention the fact 

 in his descriptions. 



