154 Happon anp Durrpen—Some Actiniaria from Australia and other Districts. 
Sphincter muscle endodermal and diffuse, variable in amount of development. 
Perfect mesenteries few or numerous. No acontia. 
We have quoted the definition of the family as drawn up by one of us;* 
it includes the genera Alicia, Cystiactis, Thaumactis, and probably Buno- 
deopsis. 
We think that the present state of our knowledge warrants the following 
arrangement :—— 
Auicup, Duerden, 1895. 
Alicia, Johnson 1861. 
A. mirabilis, Johnson, 1861, Madeira. 
A. Coste (Panc.), 1868, Mediterranean. 
A. grandis (Verr.), 1869, Panama. 
A, pretiosa (Dana), 1846, Fiji. 
A. rhadina, Hadd. & Shackl., 1893, Torres Straits. 
Cystiactis, Milne-Edwards, 1857. 
C. Eydouxi, M. Edw., 1857, Chili. 
C. Gaudichaudi, M. Edw., 1857, Rio Janeiro. 
C. Reynaudi, M. Edw., 1857, Cape of Good Hope. 
C. tuberculosa (Quoy & Gaim.), 1833, Bass Straits. 
C. Eugenia, Duch. & Mich., 1866, West Indies. 
Thaumactis, l’owler, 1889. 
T’. medusoides, Fowl., 1889, Papeete. 
Bunodeopsis, Andres, 1880. 
B. strumosa, Andr., 1880, Bay of Naples. 
ALICIA. 
The genus Alicia has been re-defined as follows in the paper just referred to :— 
““ Tissues very delicate. Tentacles elongated, more or less retractile. Column 
with the distal vesicles pedunculated and much divided, the proximal vesicles 
simpler and more or less sessile. Sphincter muscle feebly developed. Mesenteries 
not very numerous; two pairs of directive mesenteries.” 
CYSTIACTIS. 
Column covered with simple vesicles. Tentacles of variable length in one, 
two, or three cycles. Numerous perfect mesenteries. Sphincter muscle moderately 
well developed. 
* J. E. Duerden, ‘On the Genus Alicia (Cladactis), with an Anatomical Description of A. coste, Panc., 
Ann. Mag. Nat. Hist. (6), xv. 1895, p. 213. 
