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



Pinnules with a calcareous plate. 



Family 2. Stylatulid^. 

 Genera Stylatula, Verr. 



Duhenia, Kor. and Dan. 

 Acanthoptilum, Koll. 

 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^-e. 

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

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



fi. With ventral zooids. 

 Family 2. Stachyptilidje. 

 Genus Stachyptilum, Koll. 



bb. Polyps without cells. 

 Family 3. Anthoptilid^. 

 Genus Anthoptilmn, Koll. 



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

 Sub-section II. JUNCIFOEMES. 



aa. Polyps without cells. 



a. Polyps large. 



aa. Eachis elongated, cylindrical. 



Family 1. Kophobelemnonid^. 



Genera Kophohelemnon, Asb. 



Sclerohelemnon, Koll. 



Bathyptilum, Koll. 



^^. Eachis short. 



Family 2. Umbellulid^. 



Genus Umbellula, Lam. 



