276 Reports and Proceedings. 
and their Fossils, which was illustrated by vertical sections and a 
large suite of specimens from the district. After describing the 
principal physical features of Carluke Parish, which is about 8 miles 
long by 44 broad, Mr. Hunter mentioned the occurrence of a very 
extensive fault in Braidwood Gill, of 80 fathoms, which brought 
down the Cannel- or Lesmahagow Gas-coal to the horizon of the ‘Pro- 
ductus giganteus Limestone.’ He then subdivided the group of Car- 
boniferous Limestones in his parish into three series; namely, (1) the 
Lower Carboniferous Limestone, or Mountain-limestone, embracing 
strata from the ‘P. giganteus Limestone’ to the ‘Lingula-limestone ;’ 
(2) the Middle Coal-measures, from the Gas- or Cannel-coal to the 
strata immediately above ‘ Carluke First Coal; and (38) Upper Car- 
boniferous Limestone, from the ‘Climpey Limestone’ to the strata 
above the ‘ Gair Limestone; the whole being upwards of 130 
fathoms in thickness, and having as superincumbent strata the ‘ Upper 
Coal-measures,’ comprising the Ell, Main, Splint, and other Coals; 
while the Lower Coal-measures, again, come below the ‘ P. gugan- 
teus beds,’ and extend to below the ‘P. punctatus beds.’ The 
limestones themselves above the ‘P. giganteus Limestone’ were 
generally persistent, and could be recognized in different and wide 
localities in the West of Scotland, showing their great horizontal 
extent. In his own parish there was abundance of limestone to last 
for ages, for all practical purposes. He then proceeded to notice 
the various fossil contents of the different beds of limestone, and 
accompanying shales and ironstone-bands, in an ascending order. 
The first remains we come to above the Old Red Sandstone are 
specimens of Lingula mytilordes, a cast of a Bellerophon, and some 
indistinct Plant-remains, found by Dr. Selkirk, of Carluke, in 
ironstone-nodules 33 feet above the Old Red. Then in the ‘P. pune- 
tatus beds’ of the Lower Coal-measures have been lately found new 
forms of Entomostraca—Leperditia, Bairdia, Cythere, Beyrichia, 
and others, now being examined by Prof. Jones and Mr. Kirkby. 
The ‘ Main Post Limestone’ alone, which is not more than from four 
to six feet thick, has yielded upwards of 160 genera and species, 
including many new and rare forms. Owing to the occurrence of 
fissures in this limestone, the sides of which seem to be water-worn, 
the ‘ Main Post’ is in some places decomposed, and reduced to a very 
soft and friable state. When in this state, fossils are more easily 
found in it, and many new species have thus been added to science. 
Among these are some new Entomostraca provisionally named by Prof. 
Jones and Mr. Kirkby—Leperditia Armstrongiana, Kirkbya Per- 
miana, Bairdia grandis, B. brevis, B. gracilis, and 15 others: also 
a few Foraminifera, the first discovered in Scottish Carboniferous 
strata. Among the rarer species of Mollusca are Retzia radials, 
Spirifera pinguis, Camarophoria globulina, Chonetes polita, C. 
- Buchiana, Productus Deshayesianus, Conocardium armatum, Arca 
Lacordariana, Pleurotomaria altivittata, Trochus lepidus, posterior 
plate of a Chiton (rarely found in British Carboniferous strata), Por- 
cillia armata, Nautilus tuberculatus, and interiors of Athyris am- 
bigua, Spirifera duplicicosta, Productus aculeatus, and P. mesolobus. 
