part 2] rugose corals from the burindi series. 161 



suceession of the formations and their correlation with the Upper 

 Palaeozoic rocks of Europe in the following synopsis : — 



' Pernio- Carboniferous System.' Permian and (F) Upper Carboni- 



(Hunter River Series.) ferous. 



Unconformity. 

 Kuttung Series. Conglomerates, Middle Carboniferous. 

 etc. 



Conformity. 

 Burindi Series. Mudstones, etc. Lower Carboniferous = Visean. 



Apparent conformity, but possible non-sequence. 

 Barraba Series. Mudstones and Upper Devonian, but possibly ex- 

 tuffs, tending into Lower Carboniferous.. 

 Conformity. 

 Tamworth Series. Radiolarian Middle Devonian. 

 claystones", tuffs, limestone, etc. 



III. Amygdalophyllum, Dun & Benson, 1920. 



[Proc. Linn. Soc. N.S.W. vol. xlv, pp. 339-41.J 



Simple coral. The corallum has the usual horn-shaped form. 

 (turbinate to cylindrical) common to most solitary Rugose Corals. 

 The septa are both numerous and long, 1 and fine dissepimental 

 tissue builds up a wide extrathecal area.' 2 The distinguishing 

 character of the genus is the remarkably large solid columella. 



Genotype. Amygdalophyllum etheridgei; no other species of 

 the genus is yet known. 



Amygdalophyllum etheridgei Dun & Benson. (PL VIII, 

 figs. 1-3; PL IX, fig. 2.) 



1920. Amygdalo2)liyllum etheridgei Dun & Benson, Proc. Linn. Soc. 



N.S.W. vol. xlv, pp. 339-41 & pi. xviii, figs. 2-6; non fig. I. 3 



1921. Amygdalophyllum etheridgei Dun & Benson. Pec. Geol. Surv. 



N.S.W. vol. x, p. 34. 



' KonincJcophyllum'' inopinatum Etheridge fil. ; Greol. Surv. 

 Queensl. Bull. 12 (1900) pp. 21-22, pi. i, fig. 2 & pi. ii, figs. 9-10,. 

 very closely approaches A. etheridgei, and is in all probability con- 

 generic with that species. The forms agree in the type of the 

 columella, in their numerous septa, and in their wide development 

 of fine dissepiments. ' K.' inopinatum differs from A. etheridgei 

 in the major septa not reaching the columella, and in the minor 

 septa attaining only half the length of the major. 



1 The descriptive terms long and short, here used in reference to septa, 

 denote their character as seen in transverse section. 



2 The theca is the annular wall formed by the innermost layer of dis- 

 sepiments against which the tabulfe abut; see Q. J. G. S. vol. lxxi (1915-16) 

 p. 228. This wall divides the corallite into an intrathecal and an extra- 

 thecal area. 



3 The coral figured in the original description to illustrate external form 

 (pi. xviii, fig. 1) was found when cut to be a specimen of Zcvphrentis 

 swmphuens Etheridge fil., which it externally resembles. 



