/b NATURAL HISTORY OF 



The Corymorpha is enabled to attach itself by a 

 modified hydrorhiza not only to stones and other firm 

 bases, but to sand. In the latter case the hydrorhiza 

 takes the form of hair-like rootlets. 



The species was first described by Forbes and 

 Goodsir in the Annals of Nat. Hist, for 1 840. ■ It has 

 been thoroughly investigated by Prof. Allmau, " Gym- 

 noblastic Hydroids/'' 205. 



2. C. NANA, Aid. 



Hydractinia ((?./., B.Z., 463), Halatractus nana (AIL). 



Hab. : North- East Coast. Height |- — | in. 



Described by Alder in " Northumberland and 

 Durham Cat. Trans. F. C," iii. 108, and in the supple- 

 ment to the same Transactions, v. 233. This species 

 is smaller than G. nutans, and has sessile gonophores. 



FAMILY XII. CLADOCORYNID^. 



Polypites -with both simple and branched capitate 

 tentacles 



Genus Cladocoryne, Botch. 



Stem invested by a chitinous polypary, and rooted 

 by a creeping filiform stolon. Polypites claviform, 

 with a single wreath of simple capitate tentacles round 

 the mouth, and several verticils of capitate tentacles on 

 the rest of the body. — Rotch. 



1. C. FLOCCOSA, Botch. 



Hab. : Herm (Botch). Height i in. 



Described in A. and M. of Nat. Hist., March, 1871. 



The species is remarkable from the possession of 

 branched tentacles which form three or four verticils 

 round the body, with three or four tentacles in each 

 verticil. The colour is reddish- brown, with an opaque 



