CARBONIFEROUS ROCKS OF THE SOUTHERN HEMISPHERE.’ ;° 109 
cation and description are still required. In the same formation and 
also in quite a different horizon a series of imperfect remains of a 
bivalve always referred to Inoceramus have been long known. It 
appears that these may be the remains of a species of Pinna or allied 
genus. ‘The limestone in which the fossils named occur is in contact 
with strata that contain Triassic fossils (the so-called Mytilus proble- 
maticus, Zittel). If the fossils in the limestone are truly Permo- 
Carboniferous a disconformity of some sort must be present. A 
thrust plane has been described by McKay at this point. Elsewhere 
no Permo-Carboniferous fossils have been found anywhere in New 
Zealand. Park’s Aorangi series is based upon no exact information 
of any kind. The Mount Potts beds often referred to the Carboni- 
ferous or to the Permian are now known to be of Rhetic age, for the 
plant remains have been identified by Arber. Halobia is common 
amongst the marine shells at Mount Potts. 
Fossils have been collected from the Kaihiku formation both in 
the Kaihiku Gorge and in the Hokanni Hills by C. T. Trechmann 
and P. Marshall. They will shortly be described by the former. It 
may be stated provisionally that they appear to indicate a middle 
Triassic age. The Kaihiku formation has often been classed as 
Permian. The Mount St. Mary fossils at one time referred by Park 
to the Permo-Carboniferous are also known to be of Triassic age. 
It thus appears that at the Wairoa Gorge alone definite Permo-Car- 
boniferous fossils have been found. The occurrence of red shales 
with the series in which these fossils occur suggests that much of the 
Maitai series which contains such shales in many parts of the moun- 
tain ranges of New Zealand should also be classed in the Permo- 
Carboniferous. This problem, which is difficult because of the absence 
of fossiliferous beds, remains to be solved by future study. 
To sum up, it can be definitely stated that Permo-Carboniferous 
beds are known to occur at the Wairoa Gorge only and this opinion 
is based on the expectation that the fossils are of the nature described. 
Fossils of Middle and Upper Triassic age occur at several places in 
the rocks of the mountain ranges of New Zealand. The strata at 
the ‘Wairoa Gorge show no indications of glacial erosion or of glacial 
deposition in any of the horizons. 
The Nomenclature of the Carboniferous, Perimo-Carboniferous, and 
Permian Rocks of the Southern Hemisphere. 
By A. E. Kitson, F.G.S., Principal of the Mineral Survey 
of the Gold Coast. 
Questions 1, 2, and 3.—I prefer a single name for all the Australian 
late-Paleozoic glacial deposits, but think that the local names, such 
as Hunter, Lochinvar, Wynyard, Inman series should be retained. 
Inman is, I think, preferable to Raminyere. For the Bacchus Marsh 
area I think the name might be changed with advantage, since the 
typical deposits are some miles away from that place, on the Werribee 
River and Korkuperrimul Creek. Moreover, the double name is a 
drawback. I would suggest the name Werribee (or Werribi, the 
geographical spelling of the sound). It is an aboriginal name, and is as 
