Happon anp Durrpun—Some Actiniaria from Australia and other Districts. 155 
The genus Cystiactis was thus defined by its author, Milne Edwards :—“ Body 
entirely covered with subtentaculiform tubercles, or presenting an appearance of 
Yeu rer > 1 “7 ~ 9) 
large, very prominent vesicles. 
He erected the genus to include three species of 
Actiniaria, preserved in the Paris Museum of Natural History. These species 
Were).—— 
1. Cystiactis Eydouxi.—Tentacles thick-set, moderately numerous, longitudinally 
striated by contraction; the external smaller than the internal. Body covered 
with large vesicles of very unequal size, very crowded and irregularly arranged. 
Of a uniform brown colour in alcohol. Coasts of Chili (Eydoux). 
2. Cystiactis Gaudichaudi.—Tentacles longer and more slender than in (. eydouzt ; 
vesicular tubercles of the body smaller, sub-serial, and often presenting at the 
summit a kind of rosette formed by blackish spots [the last character rather suggests 
that this species will ultimately be transferred to the genus Alicia]. Blackish in 
alcohol. Rio Janeiro (Gaudichaud). 
3. Cystiactis Reynaudii—Tentacles shorter than in C. Eydouzi and C. Gaudi- 
chaudi. 'Tubercles in the form of crowded vesicles, sub-serial, and of a medium 
size. Clear brown colour in alcohol. Cape of Good Hope (Reynaud). 
This genus was adopted by Duchassaing and Michelotti, who described a new 
species, C. Eugenia. Mem. R. Accad. Sci. Torino, xxi, 1866, p. 129, pl. vi., fig. 1. 
This has a cylindrical column, with club-shaped vesicular tubercles. Tentacles 
few (about 20), sub-equal, cylindrical, pointed, long, delicate, translucent. Peri- 
stome prominent. Of small size, and swimming freely or adherent to floating 
objects. 
In his Monograph, Andres (p. 228) admits only the last as belonging unques- 
tionably to this genus, and places the species described by Milne-Edwards amongst 
his “‘ Bunodide dubie” (p. 236), as they are insufficiently characterised and 
figures are wanting. He adds:—‘‘The form of the column reminds one of 
Bunodeopsis.” 
Milne-Edwards places Cystiactis amongst his ‘ Actinines verruqueuses,” and 
Andres puts them in the sub-family, Bunodidz. When we investigated Cystiactis 
tuberculosa (Q. & G.), we found that it would have to be removed from that group; 
and since then one of us has examined an allied form Alicia Coste (Panc), and the 
new family Aliciide was proposed to include these two genera. 
Judging from the figure (Atlas, pl. ii1., fig. 19) it is possible that A. monilifera 
Dana (U. S. Expl. Exp.) may belong to this genus. 
Our definition of the genus is based upon an examination of C. tuberculosa, and 
may have to be emended when the type species is rediscovered and properly 
described. 
TRANS. ROY. DUB. SOC., N.S. VOL. VI., PART VI, 2B 
