84 
The method of budding in this species, of all our Tryplasmce , more 
closely resembles that of Pycnostylus, Whiteaves, two or four buds. In PI. 
XXIII, fig. 5, is a very beautiful example of the latter condition. Whiteaves 
remarks on the budding of P. guelphensis : — “ Natural transverse sections of 
this species .... show a quadripartite, and more rarely a tripartite, 
division of the corallites. The appearance might be supposed to be the 
result of fission, rather than of calicular gemmation, but is really due to the 
coalescence of the inner walls of the corallites immediately after budding;.” 
Each bud in T. verm for mis is deltoid in transverse section, the four buds 
occupying the whole of the calice, the apices of the deltoids leaving a small 
free space between them in the centre (PI. XXIII, fig. 5) ; each bud has 
already developed septa along its outer convex wall. 
In many corallites the proper wall is very distinctly preserved as a 
thin dark circumferential line, with a narrow inner ring of stereoplasma. 
The same remark also applies to both the septa and tabular 
Locality. — Portion 9, Parish Boree Nyrang, County Ashburnham 
( C . Cullen— Mining and Geological Museum). 
Tryplasma congregations, sp. nov. 
(Plate XIII, Pig. 1 ; PI. XXI, Fig. 10; PI. XXIII, Fig. 10.) 
Specific Characters. — Corallum of sub-fasciculate masses of corallites 
connected by very numerous fistulae. Corallites long, erect, cylindrical, sub- 
parallel, contiguous to one another or separated by various intervening 
distances, enlarging and contracting in their course; in section more often 
oval than round, with their longest diameter from ten to fifteen millimetres. 
Epitheca thin, and ornamented with delicate, equidistant, raised, encircling 
threads, here and there interspersed with thicker ones. Eistulae very 
numerous, round or oval, usually more or less equally spaced apart, at 
distances of about ten millimetres, tier above tier, and on the same level 
in contiguous corallites. Septal laminae about thirty-live, primary and 
secondary ; spines delicate, non-denticulate, and remarkably short. Tabulae 
complete and incomplete, but more often the former ; complete — horizontal, 
oblique, or rolling; incomplete —as lenticular vesicles, broader at one end 
than the other. Gemmation in paired buds (?). 
Observations. — The sub-fasciculate colonies are of no inconsiderable 
size, but the exact dimensions are unknown. The long cylindrical corallites 
