608 Scientific Proceedings, Royal Dublin Society. 



cluster of sacs. Although thread cells occur in and beneath the 

 ectoderm, they do not form a cushion or battery on the summit of 

 the spermatophore, as in Eudendrium arbusculum, Strethill Wright. 



The specimens from Station 14, growing on Sciurella indivim 

 are the female forms of E. generate. The female gonophores, from 

 three to five, but usually four in number, grow from the base of 

 the hydranth in the form of sub-sessile, oval bodies, 4 mm. in 

 diameter. 



The specimens from Station 2 are the male form. The sper- 

 matophores form verticils of moniliform sacs growing from the 

 base of a hydranth. Some of the sexual hydranths remain, but 

 atrophy, more or less complete, has overtaken others. 



The specimens from Torres Straits, attaining a height of from 

 1 to 2 \ inches, are larger than those found at Port Jackson and 

 Port Phillip. The diameter of the branches varies from '1 mm to 

 '2 mm. The annulations of the perisarc are very feebly marked, 

 usually amounting to a slight wrinkling at the base of the branches. 



Eudendrium capillare, Alder, is a more slender growth, the 

 diameter of the branches varying from *06 to "08 mm., and the 

 ramification is more profuse. 



Eudendrium arhcsculum, Strethill Wright, forms a bushy tree 

 of adnate stems. 



Habitat. — Port Jackson (Brit. Mus. Coll. Lendenfeld) ; Port 

 Phillip, Lendenfeld; ! Torres Straits, Haddon. 



Lafoea costata, Bale. 



Many of the hydrothecse are smooth, and without the ridges. 

 The plane of the orifice is oblique to the long axis of the hydro- 

 theca. 



Habitat. — Growing on Sciurella indivisa, Murray Island ; 

 15-20 fms. 



Lictoretta halecioides, Allman. 

 Lafoea halecioides, Allman. — Trans. Zool. Soc. viii. 1874, p. 472. 

 Campanularia rufa, Bale. — Trans. Boy. Soc. Yict. xxiii. p. 91. 

 Lictorella halecioides, Allman. — Chall. Rep. Hydroida, II. p. 35. 



