AKD SPECIES OF HYDEOIDA. 261 



close to the distal ends and on alternate sides of rather short 

 internodes, into which both main tube and branches are divided ; 

 margin of orifice entire, surrounded by a narrow band-like rim. 

 Gonosome. Not known. 



Locality. Ceylon, M7\ Holdsworth. 



Gampanularia juncea is a very large, strong species ; the stems, 

 towards their base, where they are as yet unbranched, have a thick- 

 ness of about ^ of an inch, and might here almost be taken for 

 a cluster of the stems of Tuhularia indivisa. The specimens were 

 all incrusted with an opaque calcareous deposit ; and when freed 

 from this, the stems presented a light-brown glossy surface marked 

 by shallow longitudinal corrugations. The hydrothecse have a 

 singular resemblance to the usual form of the bowl of a tobacco- 

 pipe ; they measure about -^-^ of an inch in height, and contract 

 below into a very short peduncle, by which they are supported on 

 the bracket-like processes of the hydrocaulus. The branches are 

 considerably thinner than the main stem, from which they spring 

 at a wide angle ; they attain a length of from | an inch to about 

 2 inches, and are mostly given off from alternate sides. 



The Hydroid grew in dense clusters of closely approximated 

 tubes ; the clusters often measure at their base 1 or 2 inches in 

 diameter. 



As nothing is known of the gonosome, the reference of this 

 species to Campanularia is provisional. 



SEBTULABIlDyE. 



Sebtulabella. 



Sertularella Johnstoni, Gray. Plate XIII. figs. 1, 2, 



Syn. Sertularella Johnstoni, Gray, in Dieffenbach's New Zealand ; 



Coughtrey in Journal of Otago Institute, May 1874. 

 Sertularella gracilis, Allman, MS, 



Trophosome. Hydrocaulus attaining a height of about 4 inches, 

 very slender, much and irregularly branched; branches zigzag, 

 sending off pinnately-disposed alternate ramuli at regular inter- 

 vals along their length, the whole forming a dense tuft. Hydi'o- 

 theese carried each near the middle of a rather short, well-defined 

 internode, adnate to the internode for about half their height, 

 free portion slightly contracted ; orifice with tliree well-marked 

 teeth, one of which is superior and two lateral. 



Gonosome. Gouangia borne both upon the main stem and the 



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