6 Mr. J. E. Daerden on 



cycle. They further resemble those of A. cosfce in structure, 

 especially in the form of the mesogloeal plaitings, which are, 

 however, a little more pronounced in the present species. 

 Mesenterial filaments are well developed, crowding the 

 coelenteron ; abundant granules and large stinging-cells are 

 in connexion with them. The endoderm of the mesenteries 

 has small nematocysts. 



Gonads. — No reproductive cells could be distinguished in 

 the single specimen examined. 



Genus BuNODEOPSiS, Andres. 



Bunodeopsis, Andres, 1880. 

 Bunodeopsis, Andres, 1883. 

 Bunodeopis, Haddon and Duerden, 1896. 



Tissues very delicate. Tentacles elongate, readily retrac- 

 tile. Column short, beset proximally with pedunculate or 

 sessile vesicles, the vesicular area much broader than the 

 capitulum. Sphincter muscle feebly developed. More than 

 six pairs of perfect mesenteries. 



The genus Bunodeopsis was established by Andres (1880) 

 to include a form of which the distinguishing characters are 

 that the column is short and thick, protruding here and there 

 in hollow prominences, and with a collar developed like a 

 capitulum. Previous to the present communication only one 

 species — B. strumosa, Andr. — was known. Andres states 

 that it closely resembles in appearance and habit the Cystiactis 

 Eugenia of Duchassaing and Michelotti, found in the West 

 Indies, differing from it only by the possession of tiie well- 

 developed capitulum, and that whenever it is proved that this 

 also possesses a similar capitulum, then the genus Bunode- 

 opsis must be merged into Cystiactis, and its single species will 

 become Cystiactis strumosa. The latter genus is thus defined by 

 Milne-Edwards (1857, p. 276) : — " Corps enti^rement convert 

 de tubercules subtentaculiformes ou ofFrant I'aspect de grosses 

 phlyct^nes tr^s-saillantes." I was in hopes of rediscovering 

 Duchassaing and Michelotti's C. Eugenia around Jamaica, but 

 so far have not been successful, unless the present undoubted 

 Bunodeopsis be the same as that meant by these two authors. 

 Considering the close similarity which has been already 

 ascertained to exist amongst the species of Actiniarians from 

 the various West-Indian Islands, there is a little proba- 

 bility in this position ; but when we compare the figure and 

 description of C. Eugenia with that of Bunodeopsis, it seems 

 far preferable to await further researches and for the present 



