242 The Irish Naturalist. [Sept., 



The finding oi Rhizogdoii fusiformis is of great interest, as I 

 do not think that a specimen of this genus has been recorded 

 before for Europe. 



For the notes on Tubularia I am mainly indebted to the 

 Misses Delap. To the Rev. A. Delap, the Rector of Valencia, 

 and his family we are greatly indebted not only for their kind 

 hospitality, but also for valuable information relating to the 

 marine fauna of the district. 



I. CYIVINOBLASTIC HYDROIDS. 



(AUman. 1872. Monograph of the Gymnoblastic Hydroids.) 



Clava multlcornls (Forskal). 



A single colony growing upon a stone was found near low-water mark. 

 The gonophores contained ripe ova and formed a broad ring round the 

 hydranth immediately behind the proximal tentacles. The hydranths 

 were about 4 mm. in length, with whitish tentacles. The endoderm 

 cells of the hydranth and of the spadix of the gonophores were of a 

 blackish colour. July, 1896. 



Clava squamata (Miiller). 



A few colonies found attached to sea-weeds growing near low-water 

 mark. All the colonies possessed gonophores which showed con- 

 siderable variation in colour. The gonophores are usually of a reddish 

 colour, but in some of the colonies the gonophores were of a purplish 

 colour, or even bright blue. The purple and blue colours were only 

 present in mature gonophores. The unripe gonophores were of the 

 usual reddish colour. April, 1895. 



Corync vagrlnata (Hincks.) 



This species was fairly common in the harbour, attached to sea-weeds 

 or to the sides of rock-pools. 



There are two well marked forms of this species. The one is 

 characterized by its length, and agrees with the description given by 

 Allman. It is usually two or more inches in length, and connected with 

 the stolon by only a few stems ; sometimes only one long stem is pre- 

 sent. The tendency of the colony is to grow in length, and it is usually 

 attached to the side of a rock-pool. The other form makes a close, com- 

 pact colony, usually attached to sea- weeds along which the stolon ramifies 

 and gives off numerous stems. In general appearance it resembles 

 Coryne pusilla, but not in detail. The gonophores are situated in the 

 axils of the tentacles, and the perisarc of the stem extends to, or nearly 

 to, the lowest tentacles. In these points the Hydroid may be dis- 

 tinguished from Coryne pusilla, in which the perisarc does not send off a 



