THE 
THISTLE MADREPORE. 
GENERIC CHARACTER. 
Animal allied to a Medusa. 
Coral marked with lamellar star-shaped cavities. 
SPECIFIC CHARACTER, tfc. 
Dichotomous MADREPORE, with furrowed, 
muricated branches, simple, regular stars, 
and tooth-serrated lamellae. 
MADREPORA CARDUUS. 
Soland & Ellis Zooph. p. 153. pi. 35. 
The Thistle Madrepore is found adhering to rocks 
in the Indian ocean, and is represented in its natural 
size on the annexed plate. 
