PLATE II. 



1. A tubiporite agreeing with the fossil tubipore of Linnaeus, described as Tubi- 



pora Strues, forming a lightish brown marble. 



2. Longitudinal section of the madreporean star. 



3. One of the feet, or rather nrrrK, of the. madreporean insert, described by Donati, 



as employed in forming its habitation, the madrepore. 



4. The whole animal ; its head being in the centre, surrounded by its numerous 



arms, which may be considered as the instruments with which the animal 

 forms the lamella of the madrepore. 



%* The three last figures are copied from a plate in Ellis's Zoophytes, being there unde- 

 scribed: no description of them having been found in the papers of Mr. Ellis. 



