CORALLIFERJ. 



CAMPANULARIA, Lamarck, . 



The extremities of the branches through which the Polypi pass are widened 



and bell-shaped. 



Lamouroux separates them into CLYTIA, where the stems are scandent : 

 And LAOMEDA where they are not; the bells also are smaller and the 



branches shorter. 



SERTULARIA, 



The Sertulariae have a corneous stem, sometimes simple, sometimes ramous, 

 on the sides of which are cells, extremely various in form, that are occupied 

 by the Polypi, all connected with a gelatinous stem that traverses the axis, 

 like the medulla of a tree. They propagate by ova or buds, which are deve- 

 loped in cells larger than the rest, and of a different form. 



The various directions of their cells have caused them to be subdivided. 



AGLAOPHENIA, Lamouroux PLUMULARIA, Lamarck, 

 Where the little cells are arranged on one side only of the branches. 

 AMATIA, Lamouroux SERTULARIA, Lamarck, 



Where they are united, in certain places, like the pipes of an organ. 



We might distinguish those species in which the cells, thus disposed, form 

 a spiral line round the stem. 



ANTENNULARIA, Lamarck CALLIANYRA, Lamouroux, 



Where the cells form horizontal rings round the stem. 

 Thus the name of 



SERTULARIA proper 



Becomes restricted to those in which the cells are placed on both sides of the 

 stem, either opposite or alternately. The first are even again separated by 

 Lamouroux under the name of Dynamenes. 



Where the cells are extremely small we have his genus THOEA. 



FAMILY II. 



CELLULARII. 



WHERE each Polypus is adherent in a corneous or calcareous cell with 

 thin parietes, and only communicates with s the others by an extremely tenuous 

 external tunic, or by the minute pores which traverse the parietes of the cells. 



These Polypi bear a general resemblance to the Hydrae. 



CELLULARIA, Linnaeus, 



Where these cells are so arranged as to form branching stems in the manner 

 of the Sertulariae, but without a tube of communication in the axis. Their 

 substance also is more calcareous. 



