32 
The following brief scheme exj)lains their respective positions : — 
[ Moniliform swel- 
lings rudimentary 
Walls with periodical 
moniliform swel- / 
lings more or less 
developed 
Ifoniliform swel- 
lings Avell developed 
/ Geinitzella. 
Tahnlso 
complete 
\Stenopora. 
Tahnlae ^ 
incomjdete ( Tahulipora. 
Genus — STENOPORA, Lonsdale, 1844. 
Stenopora, Lonsdale, in Darwin’s Deol. Obs. Vole. Islands, ISI-l, p. IGl (note) 
„ Lonsdale, in Sti'zelccki’s Pliys. Descrip. X. S. AVales, &c., 1SI5, p. 2G2. 
Ttlhuliclidia, Lonsdale, Bull. Soc. Geol. France, 1811, I, p. 497. 
„ Lonsdale, in Murchison’s Geol. Russia, &c. 1845, I, pp., 221 & G31 {note). 
Stenopova, Nicholson & Etheridge, Junr., Ann. Mag. Nat. Hist., 1879, IV, p. 2G5. 
„ Nicholson, Tab. Corals Pal. Period, 1879, p. 1G8. 
„ AVaagen & AVentzel, Pal. Indica, Salt Range Fossils, 188G, Yol. I, Part G, p. 885. 
(Compare Geinitzella, AVaagen & AVentzel, loc. cit., p. 880.) 
Gen. C4«r.— Corallnm ramose (ahorescent) or suhlohate, sometimes 
massive, occasionally frondescent, attached to foreign bodies, nsnally by the 
centre of its base, and composed of tubular corallites, Avhich are nearly 
vertical in the centre of the corallum, and radiate outwards from an imaginary 
axis at various angles to open on all points of the free surface. Corallites 
jiolygonal, thin-walled, and more or less comjtletely in contact ; in the outer, 
curved, or peripheral jiortion of their course more or less cylindrical, and 
annulated by periodical ring-shaped thickenings, which are sometimes placed 
at corresponding levels in contiguous tubes. Visceral chambers in the outer 
portions of the tubes alternately contracted and dilated in correspondence 
with the periodic thickening of the walls just sjioken of, but open and sub- 
polygonal in the axial portion of the corallum. Acanthopores usually present. 
