34 THE VOYAGE OF H.M.S. CHALLENGER. 



Pinnules with a calcareous plate. 

 Family 2. Stylatulid^. 



Genera Stylatida, Verr. 



Duhenia, Kor. and Dan. 

 Acanthoptilum, KoU. 



BB. Eachis without pinnules, polyps sessile. 

 Section 11. SPICAT^. 



a. Polyps on both sides of the rachis in distinct rows 

 Sub-section I. FUNICULINE^. 



aa. Polyps with cells. 



a No ventral zooids. 

 Family 1. Funiculinid^. 



Genera Funiculina, Lam. (sp. F. quadrangularia). 

 Halipteris, KoU. (sp. H. christii). 



13. With ventral zooids. 

 Family 2. Stachyptilid^. 

 Genus Stachyptilum, KoU. 



bb. Polyps without cells. 

 Family 3. ANTHOPXiLiDJi;. 

 Genus Anthoptilum, KoU. 



b. Polyps on both sides of the rachis in a single series or in indistinct rows. 

 Sub-section II. JUNCIFOEMES. 



aa. Polyps without ceUs. 



a. Polyps large. 



aa. Eachis elongated, cylindrical. 



FamUy 1. Kophobelemnonid^. 



Genera Kophohelemnon, Asb. 



Sclerobelemnon, KoU. 



Baihyptiliim, KoU. 



/3/8. Eachis short. 



Family 2. Umbellulidjs. 



Genus Umbellula, Lam. 



