101 
The structure of the racliciform processes is concentric (PI. XXII, 
fig. 10). 
I have included under T. princeps what might, at first sight, appear 
to be two distinct corals, looking at the outward form only. As far as my 
examination has gone, all, however, possess a similar internal structure. 
We see, in the first instance, the long cylindrical Camp op hy lluni - like coral- 
lum (Pi. XVII, fig. 1), abruptly ending below in a much contracted and 
insignificant base, and bearing one bud above on the calcine margin. The 
next step in advance are the two corals (PI. XX, figs. 3 and 5), each giving 
off six buds, the naturally- weathered longitudinal section (PI. XX, fig. 2), 
and the spine-pitted specimen (PI. XV, fig. 1). We may now turn to the 
subjects of Pis. XVII I, fig. 1 ; XX, figs. 1 and 4. At first sight these more 
elegantly shaped and rather ob-conical forms convey the impression of a 
distinct species, but, as already stated, the inner structure is the same as the 
cylindrical specimens, the gemmation is identical, and, if the central portion 
of PI. XX, fig. 1, be taken only, there would be no distinguishing it from 
PI. XX, fig. 5, or the central part of PI. XVII, fig. 1. Lastly, we have 
before us the beautiful specimen, PI. XVIII, fig. 1. If PI. XX, fig. 1, be 
admitted to be conspecific with PI. XVII, fig. 1, there is nothing to prevent 
PJ. XX, figs. 4 and 6, being so also. 
I am in doubt as to the identity of PI. XXII, fig. 1. The internal 
structure is that of this species, but the three very prominent bourrelet 
calice margins would imply that the original calicine disc gave off but a 
single bud at a time, each bud repeating the process in a similar manner to 
some individuals of T. wellingtonensis. 
Lindstrom’s illustration of liis Amplexus appendicnlatus of the Upper 
Silurian rocks of China would imply a close relationship with the present 
species. 
Localities . — Boree Creek, Portions 2, 3, 12-^, Parish Cudal, County 
Ashburnham : Mandagerv Creek, Portion 102, Parish Bell, County Ashburn- 
ham : Portions 84 and 92, Parish Culrindi, County Darling: Boundary, 
Portion 77, Parish Eurimbula, County Gordon: Portion 29, Parish Narragal, 
Molong District, County Gordon : east side of Portion 5, Parish Mumbil, 
County Wellington : Portion 98, Parish Gamboola, County Wellington : 
Portion 81, Parish Larras Lake, County Wellington: .Tier’s Farm, Ponto 
B>oad, eight miles from Wellington, County Lincoln : Portion 157, Parish 
Burdekiu, County Inglis ( C . Cullen — Mining and Geological Museum). 
