6 Mr. J. E. Duerden on 
cycle. They further resemble those of A. coste in structure, 
especially in the form of the mesoglceal plaitings, which are, 
however, a little more pronounced in the present species. 
Mesenterial filaments are well developed, crowding the 
celenteron ; 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, 1888. 
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 Cysteactis 
Eugenia of Duchassaing and Michelotti, found in the West 
Indies, differing from it only by the possession of the 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 Cystdactis, and its single species will 
become Cystéactis strumosa. he latter genus is thusdefined by 
Milne-Edwards (1857, p. 276) :—‘‘ Corps entiérement couvert 
de tubercules subtentaculiformes ou offrant l’aspect de grosses 
phlycténes trés-saillantes.” I was in hopes of rediscovering 
Duchassaing and Michelotti’s C. Hugenia 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 
