BY R. VON LENDENFELD, PH.D. 913 



Gonophores unknown. The Hydranihs are large, and possess 

 about 20 stout tentacles. 



It appears doubtful whether our species should be considered 

 parasitic, as I failed to find any organs by means of which it 

 might extract nourishing material from the Hydroid to which it 

 clings. It appears to me rather as if the only use the Lafoea 

 makes of the Sertularia on which it grows, was to use it as a 

 support. Lafoea Cylindrica is therefore to be termed " climbing " 

 rather than parasitic. 



Locality : Bay of Islands, New Zealand. 



IV. SUB-FAMILY SERTULARIN.E. 



8a (71). GENCJS. SYNTHECIUM. Allman. 



Sertulai^inre, with opposite alimentary zooids, and wi^h Gonophors 

 which appear to grow out from an ordinary Hydrotheca which 

 surrounds the peduncle of the Polypostyl. 



21a (233J. SYNTECIUM ELEGANS. Allman. 

 Allman (1) describes this interesting Hydroid from New 

 Zealand. It appears that Bale (2) had his doubts about it, as he 

 does not mention it in the catalogue. I have, however, found a 

 small fragment on a sea-weed from an unknown locality, which 

 corresponds to Allman's description. 



9. GENUS. SERTULARIA. Hincks. 

 63a (234). SERTULARIA SIMPLEX. Nov. Spec. 

 Hydrocaulus simple, Hydrothec?e opposite, a pair to each 

 Internode, conic aduate throughout their whole length, and 

 straight, the outer surface at an angle of about 30° to the axis of 

 the stem ; aperture, simple oval ; margin, entire and smooth, 

 lying in a plane vertical to the axis of the stem. The margin is 

 prolonged into a short conic process, looking outward on the side 

 everted from the stem. 



(1.) G. T. Allman. A M onograph of the Gymnoblastic or Tubularian 

 Hydroids. (Ray. Society for 1870, Vol. IL, page 229.) 



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



