San 
132 Cc. A. SUSSMILCH. 
( Heliolites (several species) 
| Cyathophyllum ,, 
Actinozoa < Pachypora 
| Claudopora 
| Zaphrentis 
Spongida Astylospongia 
Brachiopoda Orthisina (?) 
The genus Halysites was found to be particularly abun- 
dant, and has been described by Mr. R. Etheridge, Junr., in 
the memoirs of the Geological Survey of N.S. Wales.’ The 
limestone bed D referred to in this monograph, is the same 
as bed C on the accompanying section. The genus Hndo- 
phyllum is very abundant in Bed A and very large coralla 
occur. One example measured quite 3 feet in length, 1 
foot in height, and was of unknown width. This generic 
name is provisional, pending a detailed examination by Mr. 
Ktheridge. No endeavour has been made to make specific 
determinations of the specimens of Favosites, Heliolites, 
Cyathophyllum, etc. Mr. Etheridge is at present engaged 
upon a monograph of the Silurian and Devonian corals, in 
which these specimens will be dealt with. 
The limestone beds occurring in the N.E. part of the area 
mapped (portions 156, 196, 180, 136 parish of Barton) are 
of asomewhat different type. They are very thick and 
massive, attaining a thickness of at least 400 feet, and are 
built up mainly of crinoid stems and brachiopods, although 
corals are not uncommon. ‘The following fossils were 
obtained from these beds:— 
( Bronteus sp. ind. 
Trilobita < Calymene _,, 
\ Encrinurus(?),, 
Pelecypoda -—Conocardium Davidis, sp. nov. 
1 Paleontology No. 13. A monograph of the Silurian and Devonian 
Corals of N. 8S. Wales, Part I., the genus Halysites, by R. Etheridge, Jnr., 
Curator of the Australian Museum, Sydney. 
