REPORT ON THE PENNATULIDA. 33 



General Remarks. — After haviug described the Pennatulida collected by 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 all 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 j)ropose is the following: — 



Order PENNATULIDA. 



I. Rachis with a bilateral arrangement of the polyps. 

 A. Rachis elongated, cylindrical. 

 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. 

 SarcoiJiliijllum, Koll. 



Zooids on the ventral and lateral sides of the rachis. 

 Family 2. Pennatulida. 

 Genera Pennahda, Lam. 

 Leioptilum, Verr. 

 Ptilosarcits, Gray. 

 Halisceptnmi, Herkl. 



Pinnules small. 

 Sub-section II. VIEGULAEIE^. 



Pinnules without a calcareous plate. 

 Family 1. ViEGULAKiDiE. 

 Genera Virgidaria, Lam. 

 Scytcdium, Herkl. 

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



(ZOOL. CHALL. EXP. — PART ir. — 1880.) B £ 



