HYDRO! DA. BALE. 



I. REPORT OX THE HYDROIDA. 



T. INTRODUCTION. 



The Hydroids described in Hie present Report wei^e obtained 

 by the " Endeavour " at various localities, the most important 

 collection having been dredged in the Great Australian Bight 

 in 1911, no less than seven species out of thirteen then collected 

 being here described as new. A noteworthy feature is the 

 robust character of some of the Plumularians found in this 

 locality, two of the Aglaophenice and one Plumularia reaching 

 fully two feet in height, and comprising an enormous number of 

 individual polypes. The locality, therefore, offers a promising 

 ground for future research among its little-known Hydroid 

 fauna, hitherto practically unexplored. 



The following is a list of the species observed, with 

 localities : 



Campanularia pumila, sp. 1101: Great Australian Bight. 

 Sertularella divaricata (J?,sV,-) Hunter Group and 



Great Australian Bight. 

 Sertularia macrocarpa, Bui? Bnss Strait. 



,, maplestouei. Hide Hunter Group. 



unguiculata, Bus],- Bass Strait. 



Diphasia subcarinata (Busk) Great Australian Bight. 

 Synthecium subventricosum, *p. nov. Great Australian 



Bight. 

 Plumularia buskii, Bale Great Australian Bight. 



,, procumbens, Spencer Great Australian Bight. 



,, asymmetrica, up. noi\ Great Australian Bight. 



Kirchenpaueria producta, Bah Bass Strait. 

 Halicornopsis elegans (Lamarck) Great Australian 



Bight. 

 Aglaophenia megalocarpa, sp. nov. Great Australian 



Bight. 



A. dauuevigi, *y/. //<;. Great Australian Bight. 

 A. billardi, *p. nov. Great Australian Bight. 

 A. tasrnanica, sp. nov. Oyster Bay, Tasmania. 

 A. decumbens, sp. nov. Bass Strait. 

 Halicornaria^ intermedia, sp. nov. Oyster Bay, Tasmania. 

 ,, birostrata, sp. nor. Great Australian Bight. 



,, nrceolifera (Lamarck) Great Australian 



Bight 



