532 REPORT—1885. 
6. Carbasea piciformis, Busk, ‘Chal. Rep.’ p. 57, and ‘ Brit. Mus. 
Cat.’ p. 50. 
fk Fe cribriformis, Busk, ‘Chal. Rep.’ pl. xxxiv. fig. 8, and 
‘Brit. Mus. Cat.’ p. 51 
= Retepora cornea, Bhk., ‘ Voy. of Rattlesnake,’ vol. i. 
p. 380. 
Genus 31. Diachoris, Busk. 
‘Zoarium flexuose, spreading, loosely adnate, or sub-erect and free.. 
Zoccia flustrine, completely distinct, each connected, with six or more, 
by tubular processes.’—COhal. Rep., p. 59 
= Diachoris, Bush, ‘ Voy. of Rattles.’; ‘Brit. Mus. Cat.’ ; Heller ;. 
Macgil. ; Hutton 
= Mollia (pars) Smitt. Eschara (pars) Moll. 
1. Diachoris Magellanica, Bh., ‘Chal. Rep.’ p. 59 
= D. Mageilanica, Bk., ‘ Brit. Mus. Cat.’ 
= D. Buskei, Heller, ‘ Adriatic.’ 
1 re Var. a, distans, Bh., ‘ Chal. Rep.’ pl. xvi. fig. 2. 
2, 55 crotali, Bk., ‘Chal. Rep.’ p. 59, and ‘ Brit. Mus. Cat.’ ; 
‘ Voy. of Rattles.’; Macgil.; ‘Nat. Hist. Vic.’ Decad. 
V.peis2. 
3. 3 costata, Bh., ‘Chal. Rep.’ pl. xxxiv. fig. 4. 
4. 55 inermis, Bk., ‘Chal. Rep.’ p. 60, and ‘ Brit. Mus. Cat.’ 
. 54, 
5. 7 hiteane, Heller, ‘ Chal. Rep.’ p. 61 
=D. hirtissima, Heller, ‘ Adriatic,’ p. 94 
= Chaunosia, id., Bk., ‘Quart. Jour. Mic. Soe.’ vol. 
vil. pl. xxxvi. figs. 12-16. 
In addition to this very full record of the genus Diachoris from the 
‘Challenger Report’ of Mr. Busk, I think it only fair on my part to give 
as full a list as possible from all other sources, not only of the genus 
Diachoris, but of Flustra and Carbusea also. 
No true Diachoris has yet been recorded as occurring in British Seas, 
but Mr. Waters in his ‘Bay of Nap. Bry.’ (op. cit. p. 120, Feb. 1879) 
records three species from this locality. 
1. Diachoris patellaria, Moll., ‘Aun. Mag. Nat. Hist.’ Feb. 1879, pl. x. 
= Eschara, id., Moll. ; Mollia, id., Smett 
= Diachoris simplex, Heller, ‘ Bry. Adr.’ 
2. »” » Var. multijuncta, Waters 
= Eschara depressa, Moll. 
3. 3 Magellanica, Busk, ‘Mar. Pol.’ p. 54 
= D. Buskei, Heller. 
Mr. Hincks, ‘Contrib. to Ann. Mag. Nat. Hist.’ Feb. ‘ 
i 1881, p. 157, describes a new form from New Zealand. — 
3 bilaminata, Hincks, pl. viii. figs. 7, 7a, and the zoarium — 
is composed of two layers of cells placed back to back; — 
the connecting tubes six in number, and very short. 
Mr. Waters says the definition of Diachoris would — 
‘In a note Mr. Busk says that the D. distans described by Mr. Hincks from 4 
South Africa is quite distinct from the above. 
