Manchester Memoirs, Vol. lix. (191 5), No. \. 21 



point, as the specimen was twisted in a small specimen 

 jar. The specimen is interesting from the occurrence of 

 four epizoic zoantharia which are closely adherent to 

 the central stalk of the colony. 



The autozooids of the apical rosette do not all rise 

 from the same level, more especially there are two which 

 originate at a lower level and are more externally disposed 

 than the others. The arrangement of the autozooids in 

 the apical rosette, may be described as indistinctly bi- 

 lateral. The following figure illustrates a diagrammatic 



transverse section through the apical rosette of autozooids. 



The axis of the stalk terminates at the base of the 

 apical or central autozooid. The longer tentacles of the 

 apical autozooids are about half the length of the body of 

 the autozooid, the smaller only one-third. The pinnules 

 of the tentacles are arranged opposite one another. 

 Gonads are present in the apical autozooids. 



The siphonozooids occur on the dorsal and ventral 

 aspect of the rachis and penetrating between the 

 autozooids ; they also occur here and there on the stalk, 



