488 THE AUSTRALIAN HYDROMEDUS.E, 



171. HALICORNARIA ILICISTOMA. Bale. 



Originally described by Bale (1), as Aglaophenia ilicistoma, 

 this species from South Australia and Queenscliff* was afterwards 

 placed in the Genus ELalicornaria by him (2). 



29. GENUS. HALICORNOPSIS. Bale. 



Hydrocaulus pinnate ; Hydrothecte, with fixed anterior Nemato- 

 phores. Lateral Nematophores absent. 



172. HAL1CORNOPSIS AVICULARIS. Bale. 



This species was described by Kirchenpauer as Aglaophenia 

 avicularis (3) from Bass Straits. Bale (4) re-named it as above. 

 It was found by him in several places on the south coast of 

 Victoria. 



30. GENUS. AZYGOPLON. Allman. 



Hydrocladia pinnately disposed, mesial nematophore adnate to 

 the walls of the hydrotheca ; no lateral nematophores, Gonangia 

 springing from the stem, and destitute of any special protective 

 apparatus. 



173. AZYGOPLON EOSTRATUM. Allman. 



This Hydroid was dredged at Station 161 of the Challenger, on 

 April 1, 1874, off the entrance to Port Phillip ; depth, 38 

 fathoms ; bottom, sandy. It was described by Allman (5.) 



(1.) W. Bale. On the Hydroida of South East Australia. Journal of 

 the Microscopical Society of Victoria, Vol. II, No. I., p. 33. 



(2.) W. Bale. Catalogue of the Australian Hydroid Zoophytes, p. 184. 



(3. ) G. Kirchenpauer. Ueber die Hydroideu Familie der Plumularid.-e, 

 «-tc. Abhandlungen auf dem Gebiete der Naturwissenschaften, Hamburg. 

 I '.and V., Abtheilung 3, Seite 33. 



(4.) W. Bale. On the HydroHa of .South Eastern Australia, etc. Journal 

 of the Microscopical Society of Victoria, Vol. II., No. 1, p. 26. 



(5.) G. Aliman. Report on the Hydroida. The Zoology of the voyage 

 of H.M.S. Challenger, Part XX., p. 54. 



