dactis. It was « short » and possessed « a large margin which is smooth 

 and terminated by short unequal tentacula », and the tubercles of 

 the disk were « surmounted with several small pedunculated vvarts », 

 ali characters which may readily be understood if referring to a Rho- 

 dactis, but quite different from anything knowu to occur in Epicystis. 

 Also the reddish colour, varying in different specimens, which cha- 

 racterized Lesueur 's species may well refer to the rich umber-brown 

 of Rhodaclis sancti-thomae. The only difflculty in the way of cer- 

 tainty as to osculifera being a Rhodactis is Lesueur's statement that 

 the body possessed « several rows of perforated tubercles of an umber- 

 brown colour » through which water was ejected. These may have 

 been suggested by the occurrence of transverse wrinklings crossing 

 longitudinal ridges as described by Duerden (1000), and at ali events 

 the ejection of water is a feature of little importance. It seems to 

 me that the description points so strongly to osculifera being a Rho- 

 dactis that we may assume that it belonged to that genus and if so 

 it is identical with Actinotryx sancti-thomae, which should therefore 

 be kuown as Rhodactis osculifera (Lsr). 



ZOANTHEAE. 

 Genus Zoaiitlius. 



Zoanthus flos-marinus Duch. Mich. 



Of this species there were several specimens in a single bottle. 

 The accompanying label, which was apparently by Duchassaing, was 

 very indistinct, but the letters os and rinus could be made out, so 

 that there can be no doubt but that it was originally Zoanthus flos- 

 marinus. 



The polyps were either single or in small groups, and were more 

 or less distinctly davate in form and slightly green in colour, espe- 

 cially in their distai portions. Ali were completely contracted and 

 measured 6-8 mm. in height, with a diameter at the distai end of 

 2.5-3 mm. 



Transverse sections of the column and sphincter were made of one 

 individuai and it was found that the structure of the column wall 

 was essentially the same as what I described (1880) for Z. sociatus. 

 The mesenteries, while possessing the same general appearance as 

 those of sociatus, were much fewer, only thirty-seven in ali being 

 present, seven pairs occuring on one side and nine and a half pairs 

 on the other. The sphincter resembles closely that figured by Duerden 

 (1808) for bis Z. ftosmarinus, except that the cavities toward the 

 upper part of the lower spincter were more divided. 



