Happon—The Actiniaria of Torres Straits. 463 
? STEPHANACTIS, Hertw. 
“ Chondractiniine, in which the body is elongated in the transverse axis, the 
base enclosing a cylindrical body, such as an Aleyonarian stem; column with a 
thick wall, but not covered by a well-marked cuticle ; capitulum smooth, separated 
from the smooth seapus by a well-marked circular swelling.” (M°M.) 
MeMurrich (1893, p. 192) enters into a discussion of his reasons for abolishing 
Hertwig’s family of the Amphianthide ; but his position is not yet established, as 
we cannot be sure at present whether these forms are Sagartians. 
Stephanactis: S. tuberculata, Hertw. (1882, p. 88); S. abyssicola, Mos. (Hertw. 
(1882, p. 90); S. hyalonematis, MeM. (1893, p. 193). 
Amphianthus: A. bathybium, Hertw. (1882, p. 91); A. ornatum, Hertw. 
(1888, p. 26). 
AMMONACTIS, Verr.* 
Chondractiniine (?), with an elongated, subcylindrical column, covered, as in 
Phellia, with a persistent epidermis extending to near the summit, naked above, 
with a lobe-like tubercle below each tentacle, distinct from the margin; tentacles 
long and numerous. 
A rubricollum, Verr. 
Family.—Mrnyapipz, Andr. 
Floating Actiniine, with a pedal disk which secretes a cuticicular hydrostatic 
float. 
The group represented by the genus Minyas is so little known that it appears 
to me to be the wisest course to wait for further information before attempting 
to define its systematic position. Anatomical investigations have been made 
only by Carlgren and myself; and we had the same genus, and possibly the same 
species under observation. It is quite possible that the eight species associated 
together by Andres belong to different groups of the Actiniaria, for example: the 
Actinia olivacea of Lesueur is possibly a floating larva of one of the Stictodac- 
tyline: others may be larval forms of certain Actiniine; but the genus Minyas 
appears to be distinct, and to be representative of a special family of the 
Actiniin, but no gonads have as yet been observed in this genus. Carlgren 
suggests that Actiniaria with a decimal symmetry, and a cuticular pneumatic 
(hydrostatic) apparatus might constitute a new Tribe, the Mrnya, 
* Proc. Essex Institute rv., 1864-5 (1866), p. 150. 
