G. EUNICEA. 219 



generally branchy ; and their^branches are dispersed 

 and cylindrical. In the papillous risings, however, 

 there is a considerable difference ; for some of them 

 are short, and some in the form of pyramids pressed 

 down, whilst others are seen of great length and with 

 a rounded summit ; sometimes they have a smooth 

 surface, and at other times it is prickly. 



Their colour is the same as that of the Plexauras, 

 which is a reddish-brown fawn, of a fainter or deeper 

 hue ; it varies less than in the Gorgonias, and becomes 

 white by exposure to light and air, and the more ra- 

 pidly in proportion as the tentacula of the polypi are 

 more extended. 



These Polypidoms are found in that part of the 

 ocean situated between the Tropics, extending but 

 little into the temperate seas ; they are not scarce, and 

 are to be met with in most of the collections. 



ANTIPATHIAN. 



1. Eunice A antipathes. Polypi very large, on a 

 thick brown rind; the axe compressed, and almost 

 flat in the branches. 



Mediterranean and Indian seas. 



PAPILLOUS. 



2. EuNiCEA microthela. Branching, and almost pin- 

 nated ; branches curved ; papillas conical, and but 

 slightly projecting ; rind friable and cretaceous ; colour, 

 greenish fawn ; height from six to eight centimetres. 



FILE-FORMED. ' 



3. Eunice A limiformis. Branching or dichotomous ; 

 papillae conical, and from one to two millimetres long ; 



