196 
If this variation is constant in some species, as it seems, and the 
sphincter in some species of Bunodactiidae appears weak in its 
whole circumference, I have nothing to object to the suppression 
of the Bunodactiidae. Thus at least provisionally I refer the species 
of Bunodactiidae described here to the Actiniidae. I cannot here dis- 
cuss Stephenson’s revision of the genera, but I think that we can 
retain the genus Anthopleura for forms with marginal sphaerules 
(acrorhagi), limiting the genus Bunodactis to forms without such, in 
the same manner as we separate Åctinia from Gyrostoma. As far as 
I know, there is namely no variation as to the marginal sphaerules 
in the species of Anthopleura, so that a species may have or miss 
these organs. In this connection I cannot understand for what 
reason Stephenson assigns Tealia {Urticina) sulcata and earl- 
greni) acrorhagi. Clubb (1902) mentions no such organs in these 
species and, in faet, there are none (stated by myself on material 
determined by Clubb). Besides, both these species belong to the 
genus Bunodactis and not to Tealia, Owing to Stephenson’s 
enclosing of these Bunodactis-speciQS in the genus Tealia, Ste¬ 
phenson’s diagnosis of this genus is not good (compare my diag- 
nosis of the genus Urticina 1921, p. 160). 
Actinia tenebrosa Farqh. 
Actinia tenebrosa n. sp. Farquhar 1898, p. 535. 
» « Farq. Stuckey 1909c, p. 380. PI.23 figs. 1,2, textfig. 5. 
„ australiae n. sp. Carigren 1900, p. 32. 
Diagnosis Column shorter than broad. Marginal sphaerules 
very well developed. Sphincter diffuse, rather well developed with 
tendency to form humps. Tentacles at least to about 144 (200 or 
more Stuckey). More than half the disc without tentacles. Actino- 
pharynx with numerous longitudinal furrows and two well developed 
siphonoglyphes forming aboral prolongations. Pairs of mesenteries 
hexamerously arranged in 4 or 5 cycles, the fifth cycle more or less 
complete with irregular development in the different compartments. 
2 pairs of directives. Longitudinal muscles weak, forming no distinet 
pennons. Parietobasilar and basilar muscles strong. Nematocysts of 
the column 14—20 x 1,5—2 those of the marginal sphaerules 
^7—53 X 2,5—3,5 (4) p, those of the tentacles 19—24 x about 
