Happon—The Actiniaria of Torres Straits. 459 
ACTINAUGE, Verr. 
Chondractiniine, in which the capitulum is provided with longitudinal 
ridges; scapus strongly tuberculate or nodulate, the tubercles near the june- 
tion of the scapus and capitulum being usually stronger than those lower 
down; each tentacle with a bulbous thickening on the outer surface at the 
base. 
I have adopted M*Murrich’s (1893, p. 183) emendation of the diagnosis of this 
genus. 
A. Verrillii, M°M. (n. n. for A. nodosa, Verr., A. sp. Hadd. cf. M'M., 1898, 
p- 184); A. fastigata, M°M. (n. n. for A. nodosa, var. coronata, Verr.) ; A. Richardt, 
Mar. (cf Haddon, Trans. R. D.S., 1889, p. 319). 
HORMATHIA, Gosse. 
Chondractiniinz, inwhich the capitulum is smooth and the scapus is tuberculate ; 
no bulbous enlargements at the bases of the tentacles. 
M*Murrich, in the Appendix to his Report on the Actinie collected on the 
cruise of the ‘ Albatross” (Proc. U. 8. Nat. Mus., xvi., 1893), suggests that it 
will prove necessary to fuse the genera Chondractinia, Chitonactis, and Horma- 
thia into one as the characters which have been employed to distinguish these 
genera are by no means well defined. I am inclined to think that this is a legiti- 
mate position to take and so I have adopted this innovation. I also agree with 
him, in removing Phellia pectinata, Hert., and H. Andersoni, Hadd., to the genus 
Chitonanthus. Hormathia delicatula, Hert. (1888, p. 15), with its diffuse endoder- 
mal sphincter, marginal spherules, and three cycles of perfect fertile mesenteries 
probably belongs to the genus Actinia. 
H. Margarite, Gosse (ef. Haddon, Trans. R.D.S. 1889, p. 310); ZH. digitata, 
(O. F. Miill)* (cf Haddon, lc. p. 306), H. nodosa (Fabr.)* (Lc. p. 308); H. coronata, 
Gosse (ic. p. 312); H. Marioni (Hadd.) (ic. p. 313); H. longicornis (Verr.); 
H. spinosa, (Hert.) (= Cereus spinosus, Hert., 1882, p. 76, cf T. R.D.S. 1889, 
p. 315); H. minuta, (Hert.) (= Bunodus minuta, Hert., 1882, p. 84: cf Trans. 
R.D.S., 1889, p. 315). 
* These two species, under the genus Chondractinia, have been carefully investigated anatomically by 
Carlgren (Kongl. Svenska Vet.-Akad. Handl. xxy., 1898, pp, 110, 115). 
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