Hapvpon—The Actiniaria of Torres Straits. 419 
(1893, p. 146) says: ‘It may be, perhaps, better to unite all the forms of these 
genera which possess acrorhagi under the genus Actinia, leaving those destitute 
of such structures and without a distinct collar and fosse in the genus Anemonia.” 
Hertwig (1882, p. 31) distinctly states: ‘‘ According to my own observations, 
Anthea cereus has marginal spherules, though these do not strike the eye by their 
bright colours.” One species (his Comactis flagellifera, 1882, p. 82, which later he 
named Anemonia flagellifera, 1888, p. 5), associated by Hertwig with this genus, 
has been identified by M*Murrich (1893, p. 146) as belonging to the genus 
Actinia. 
The genus thus stands or falls according to whether the puffy capitular rim of 
A. suleata is to be regarded as being destitute of, or possessing acrorhagi. In 
other words, we are dealing with a question of degree; and if it be accepted 
that the distinction between the condition in A. eguina and A. suleata is not of 
generic importance, then it appears as if this genus must lapse, unless it be 
retained for some extreme forms which can be proved to have no capitular 
vesicular swellings of any kind whatever. 
The genus, as at present constituted, has some latitude in the amount of 
the development of the sphincter muscle. Simon (1892, p. 37), who has apparently 
only studied A. swleata, describes it as a ‘feeble, endodermal, circumscribed, some- 
times more diffused sphincter.” 
A. suleata,. . . . (Penn.), 1766 (Actinia sulcata, Penn. ; Actinia cereus, 
Ell. and Sol., 1786, p. 2; Anthea cereus, Gosse, 
1860, p. 160; Comactis flagellifera, Dana, 1849) ; 
Andr., 1884, p. 190. 
A. Contarini, . . . (Hell.), 1868, p. 18 (Actinia Contarini, Hell. ; Anemonia 
cinerea, Cont., 1844, p. 183); Andr., 1884, 
p- 193. 
A.(?) variabilis. . . MM., 1893, p. 147 (this name was withdrawn 
on p. 208, as M*Murrich later supposed it to be 
the same as Corynactis carnea, Stud.). Kwiet- 
niewski has recently (1896, p. 597) shown that 
Studer’s form is a true Corynactis, therefore 
M*Murrich’s original name stands. 
A.(?) inequalis,. . . M°M., 18938, p. 149. 
A. Ramsay, . . . (H. and 8.), 1893, p. 124. 
A. Kwoiam, . . . H.and&8., 1893, p. 125. 
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