REPORT ON THE PENNATULIDA. S3 



General Remarks. — After having described the Pennatulida collected Ijy the 

 Challenger, which consist of at least thirty-eight species and nineteen genera, amongst 

 which seven genera and twenty-seven species are new to science, I think it right to 

 conclude with some general remarks. 



First of aU I wish to propose a new systematic arrangement of the Pennatulida, as 

 the one given by me in my monograph (pages 14, 295, and 436) has become incomplete 

 in consequence of the newly-discovered forms and the addition to our knowledge derived 

 from their study. The system I now propose is the following : — 



Order PENNATULIDA. 



1. Rachis with a bilateral arrangement of the polyps. 

 A. Rachis elongated, cyhndiical. 

 AA. With pinnules or leaves. 

 Section I. PENNATULE^. 



Pinnules well developed. 

 Sub-section I. PENNIFOEMES. 



Zooids situated on the pinnules. 

 Family 1. Pteroeidid^. 



Genera Pteroeides, Herkl. 

 Godefroyia, Koll. 

 Sarcophyllum, KoU. 



Zooids on the ventral and lateral sides of the rachis. 

 Family 2. Pennatulid.^;. 



Genera Pennatula, Lam. 

 Leiojytilum, Verr. 

 PtUosarcus, Gray. 

 Halisceptrum, Herkl. 



Pinnules small. 

 Sub-section tl. "\'Tr.(IULArJE^. 



Pinnules without a calcareous plate. 

 Family 1. Virgularid.e. 



Genera Virgulana, Lam. 

 ScytaUum, Hcrld. 

 Pavonaria, Koll. (sp. P. finmarchica). 



(ZOOL. CUALL. EXP. PART II. — 1880.) i! £ 



