28 Dr. M. Coiiglitrej on New-Zealand Hydroida. 



and Polyzoa from Natal, South Africa*, remarked the re- 

 semblance between this species and S. operculata^ British. 

 The likeness only holds good with one of the varieties of 

 S. hispinosa of New Zealand ; and that is the extremely deli- 

 cate and slender variety. The other variety is so very much 

 more robust and coarse than the British specimen, that, inde- 

 pendently of the peculiar differences in the form of the gono- 

 thecas. a difference must be said to exist. 



Sertularia ramulosa, mihi. 



1 have lately met with delicate and coarse varieties of this 

 species, and have observed in some specimens that the hydro- 

 tliecaj are directed chiefly towards the outside of each little 

 fascicle or branch, the gonosomic elements lying only on the 

 inside. I have got this species at the Bluff. 



Sertularia trispinosa, mihi, loc. cit. 



The relation this species bears in habitat and minute cha- 

 racters to the above two species has been preserved in all 

 specimens I have recently gathered. 



Sertularia dbietinoideSj Hutton, loc. cit. ; Coughtrey, loc. cit. 



p. 285. 



Difnamene abietinoides, Gray, Dieffenbach's N. Z. vol. ii. 



In general habit the chief variety of this species bears a 

 close resemblance to S. filicula (British species) ; while the 

 characters of the hydrotheca^ and of the gonothecse at once 

 proclaim a vast difference not only from the above species, but 

 also from the more robust British ally S. ahietina. 



Sertularia fusiformisj Hutton, loc. cit. ; Coughtrey, loc. cit. 



p. 285. 



In consequence of there being a likelihood of this species 

 being confused with Sertularella fusiformis, Hincks, I would 

 suggest for it the name of Sertularia longicosta (from the 

 crest along one side of the gonotheca). Its ovarian capsules 

 approach somewhat the form of those described by Mr. Busk 

 on the South- African variety of Plumularia cristata (Brit. 

 Assoc. Report, 1850, p. 120) j again, the apex of the capsule 



* Brit. Assoc. Report, 1850, p. 118. 



