i897-i Browne. — The Hydroids of Valeficia Harbour. 245 



gonophores, and the subsequent growth of their stems to nearly an inch 

 in length. The distinction between a true branch and the attachment 

 of another Hydroid to the stem may be easily recognised, as the coenosarc 

 is not connected in the latter case. 



The hydranth is pinkish with white tentacles. The gonophores are 

 on branched peduncles and crowned with four conical tentaculiform 

 tubercles when mature, but not in the early stages. The spadix of the 

 gonophores is of a brilliant dark red colour. 



The growth of a colony is fairly rapid. A sailing boat, belonging to 

 the Rev. A. Delap, was launched on the 27th of April, 1896, and on the 

 1st of July actinulse were present in the gonophores of a fair-sized 

 colony. I^arge colonies, 3-4 inches in length, were taken from the 

 same boat on the 12th of August, when it was hauled up for cleaning. 

 On the 6th of October the boat was again brought ashore. Miss C. Delap 

 informed me that the bottom of the boat was almost completely covered 

 with Tubularia, and some of the colonies measured 2f inches in length. 

 The barnacles {Lepas anatifera) measured from 2 — 2^ inches in length, and 

 two of the specimens sent to me by Miss Delap had Hydroids growing 

 upon them. On one was a colony of Tubularia larynx attached to the 

 peduncle, about an inch in length, with actinulae in the gonophores, on 

 the other a fine colony of Clytia Johnstoni. 



Darwin in his book on Coral Reefs (3rd. Edit., 1889, p. 106), gives 

 the following note on the growth of Tubularia: — "The anchor of the 

 * Beagle,' in 1832, after having been down exactly one month at Rio de 

 Janeiro was so thickly coated by two species of Tubularia, that large 

 spaces of the iron were entirely concealed; the tufts of this horny 

 zoophyte were between two and 3 inches in length." 



II.— CALYPTOBLASTIC HYDROIDS. 



(Hincks, 1868, British Hydroid Zoophytes.) 

 Antennularfa antennlna (Linn.) 

 On shells dredged in the harbour. 



Antennularia ramosa (Lamarck). 



Common on shells dredged in the harbour. 



Campanularia flexuosa (Hincks.) 

 Common on sea-weeds near low-water mark. April, 1895. 

 Planulse seen inside the gonothecse. July, 1896. 



Clytla Johnstoni (Alder.) 

 A fine colony with gonophores growing on Lepas anatifera. October, 

 1896. 



Haieclum Beanil (Johnston). 



A colony bearing gonophores dredged in the harbour. May, 1895. 



Obelia geniculata (Linn.) 

 Colonies with gonophores growing along with Clytia [ohnstoni on 

 Lepas anatifera. 



