BY R. VON LENDENFELD, PH.D. 415 



about 40°, and not adnate to the branch, tubular, the outer margin 

 crowned by two teeth, which are of equal size and rounded at the 

 top. 



Female Gonotheca? with two long opposite spines, which cause 

 the symmetrical appearance. 



I found the skeletons of this Hydroid very plentiful in the drift 

 thrown up at Timaru'on the East Coast of New Zealand. The 

 specimens were collected in February, and found to be full of 

 Gonothecae. 



D1PHASIA PINNATA. Agassiz. 



This species probably very rare in Australia, has been found in 

 Sydney, and described by Agassiz (1), Hincks (2), and also by 

 Pallas (3), under the name of Sertularia pinnata. Pallas gives a 

 separate name to the female, Sertularia Nigra, and Lamouroux 

 (4) Sertularia fuscescens, Oken (5), Nigellustrum pinnatum. 



DIPHASIA ATTENUATA. Hincks. 



Hincks (6) describes this species found in Adelaide, in the first 

 place as Sertularia atienutata, Hincks (7), Ellis (8), speaks of it 

 under the name of Sertularia rosacea, Johnstone (9) under the 

 name of Sertularia pinnaster. 



DIPHASIA DIGITALIS. Bale, 



This species found by Busk (10) in the Prince of Wales Channel 

 and Torres Straits, and named by him Sertularia digitalis, has 

 been placed by Bale (11) in the genus Diphasia. 



(1 ) Agassiz. Contributions to the Natural History of the United States 

 Acalephse. Vols. Ill,, IV., 1860-62. 



(2.) Hincks. History of the British Hydroid Zoophytes, p. 255. 



(3.) Pallas. Elenchus Zoophytorum. 



(4.) Lamouroux. Histoire des Polypiers Coralligenes flexibles, p. 195. 



(5.) Oken. Jahrbuch der Natur Geschichte. 



(6.) Hincks. History of British Hydroid Zoophytes, p. 247. 



(7.) Hincks. Annals and Magazine of Natural History, April 1861. 



(8.) Ellis. Essay towards a .N atural History of the Corallines found on 

 the Coast of Great Britain and Ireland. 



(9.) Johnstone. History of the British Zoophytes. 



(10.) Busk. Voyage of H. M. S. Rattlesnake, p. 393- 



(11.) Bale. Catalogue of the Australian Hydroid Zoophytes, p. 101 



