V 
PLATE I. 
Fig. 1. A tubiporite, somewhat approaching to the Tuhipora Musica, imbedded in a 
dark coloured limestone, from Derbyshire, P. 13. 
2. A piece of marble, chiefly formed by a tubiporite of this species. This marble 
has a red tinge, apparently from the original colour of the coral. 
3. The remains of a fragment of marble of the precediUj^ kind. In consequence of 
having been exposed to the action of dilute muriatic acid, the lapideous part of 
the marble has been removed, the animal membrane of the coral, still retaining 
its colour, only remaining. 
