476 THE AUSTRALIAN HYDROMEDUS^, 



126. PLUMULARIA SULCATA. Lamarck. 

 This species was found in the Southern Seas and has been 

 described by Lamarck (1), and Blainville (2.) 



127. PLUMULARIA SCABRA. Lamarck. 

 This species fiom the Southern Sea has been described by 

 Lamarck (3), and Blainville (4.) 



12S. PLUMULARIA LAX A. Allman. 

 This Hydroid was dredged by the Challenger in Station 163. 

 Lat. 36° 56' S. long. 150° 30' E., in a depth of 120 fathoms, and 

 has been described by Allman (5.) 



129. PLUMULARIA GRACILIS. Nov. sp. 

 Plate XIV., fig. 17. Plate XVII., fig. 28, 29. 



Shoots few in number rising from an anastomosing network of 

 Hydro rhiza to a height of 10 cm. Regularly pinnately branched, 

 each pinna bears secondary Pinnte. Stem and branches black, 

 ultimate Pinna? transparent, light yellow. Pinna? alternate, one 

 on each Internode. Hydrotheca? cup-shaped with an entire margin, 

 the superior part of which projects beyond the inferior, adnate 

 to the Pinna?. Slightly bithalamic. Nematophores, two lateral 

 inferior ones in front of each Hydrotheca, and two medial ones 

 behind and above Male Gonophores a double row along the main 

 branches oval, with spinous projections on the top. 



This species was dredged by the Hon. William Macleay in 

 Torres Straits. Macleay Museum. 



130. PLUMULARIA RUBRA. Nov. spec. 

 Plate XIII., figs. 11, 12, plate XIV, fig. 15. 

 From a creeping Hydrorhiza which invests Alga? of the Lami- 

 narian Zone, shoots rise up, which attain a height of 4 cm. The 



(1.) Lamarck. Histoire Naturelle des Animaux sans Vertebres. 

 (2.) Blainville. Manual d' Actinolegie. 



(3.) Lamarck. Histoire Naturelle des Animaux sans Vertebres- 

 (4.) Blainville. Manual d' Actinologie. 



(5.) G. Allman. Report on the Hydroida. The Zoology of the Voyage 

 of the H.M.S. Challenger. Part XX., p. 19. 



