4G 
budding from the sides of the parent stem 1 2 — lateral or parietal gemmation 
in other words. From what has already been said of the true structure of 
Try plasma, it will be at once apparent that, with the exception of the parietal 
gemmation, that of Acanthodes is identical with the former, as was first 
pointed out by Dr. Lindstrom. 
Dybowski also resuscitated Dana’s genus Calophyllunriov other corals 
from the same area, consisting of simple and conical, or aggregated corallites, 
with septal lamellae of two orders, the secondary granular. Tabulae of various 
forms occupy the whole breadth of the visceral cavity. Dybowski 
regarded these corals as intermediate between C yathophylloides and Amplexus. 
It is possible that the first species described may be a Tryplasma, although 
lie mentions the presence of lateral buds, and one is shown in the species 
referred to (C. Hoemeri ). 3 
1873. — Two spefcies were referred by Professor F. II. E. Kayser to 
Amplexus that have every appearance of Tryplasma , viz. A. tortuosa, Phill., 4 
and A. irregularis, Kayser, 5 * are from the German Devonian. In the former, 
delicate septa [? septal spines] are shown in a transverse view of the corallum, 
with distant horizontal tabulae, and a fistula in the longitudinal view. In the 
latter, similar septa, and vesicular tabulae, the vesicles closely resembling 
those of several of our N. S. Wales corals. Nothing of a decisive nature can 
be gleaned from Phillips’ description and figure of A. tortuosa . G 
1876. — Amongst his synonyms of Pholidophyllum tubulatum , Lind- 
strom included Cyathophyllum radicula, Kominger, a coral from the Niagara 
Group of North America. Kominger says 7 the cylindrical corallites are 
strongly attached hy their bases to other bodies, and strengthened hy 
anchoring [radiciform] processes. There are “ about ” sixty alternately larger 
and smaller crenulated septal lamellae, which either extend to the centre of 
the bottom of the calice formed by the uppermost tabula, or the latter 
is smooth, or again faintly carinate or granulate. The reference of 
Cyathophyllum radicula to Tryplasma is hardly warranted by the description, 
more particularly as the presence of a septal fossula is foreshadowed, or in 
Kominger’s words “ a septal fovea is rarely indicated.” 
1 Dybowski — Tbid. p. 114, t. 1, f. 136. 
2 Dybowski — Ibid. p. 118. 
3 Dybowski — Ibid. t. 2, f. 3. 
4 Kayser— Zeitsch. Deuts. Geol. Gesellsch., 1873, XXIV, p. 685, t. 27, f. 5a-c. This is referrod by Freeh 
to A. hercynicus, A. Roemer. 
5 Kayser — Ibid. p. 691, t. 27, f. la-d. 
c Phillips — Pal. Foss. Cornwall, Devon, &c., 1841, p. 8, t. 3, f. 8a anil 6. 
' Roininger — Geol. Survey Michigan — Lower Peninsula, 1873-76, III, Pt. 2, 1876, p. 109, t. 39, f. 3. 
