136 Dr. Scouler on some fossil Crustacea [Feb. 



contains have been previously found fossil, and therefore it 

 appears probable, that if not considered as belonging to the 

 recent period, it must be referred to a very late tertiary era, 

 at a time when all the low lands on the banks of the Clyde, 

 at least as far up as Glasgow, have been covered by an arm 

 of the sea. 



Article VI. 



Account of some fossil Crustacea which occur in the Coal for- 

 mation. By John Scouler, F. L. S. Lecturer on Mine- 

 ralogy to the Royal Dublin Society. 



The recent discovery of the remains of fishes and reptiles 

 in the coal formation of Burdiehouse, rendered it extremely 

 probable that similar relicts might be detected in the ex- 

 tensive carboniferous strata of the west of Scotland. With 

 this expectation, different quarries in the vicinity of Glas- 

 gow were examined, and although but a short time could 

 be devoted to the investigation, the research was not alto- 

 gether unsuccessful. The remains of fishes, fSauroid fishes 

 of Agassiz) were found in several localities, and in one 

 place beds of limestone occur, which abound in impres- 

 sions of ferns and entomostraca. 



This limestone is situated about a mile to the east of 

 Paisley, and was first pointed out to me by Mr. Murray of 

 the Glasgow Botanic Garden. This rock is distinct from, 

 and probably reposes on the true carboniferous limestone, 

 but as only a small patch of it is exposed, the greater part 

 being covered by the soil, it was impossible to trace its 

 relations with the subjacent strata. This limestone is of 

 an extremely compact nature, with little plates of calcareous 

 spar disseminated through its substance. It readily splits 

 into flags of variable thickness, which are sometimes made 

 up of a multitude of extremely thin layers, indicating that 

 the whole stratum has been formed by the gradual and 

 tranquil deposition of transported matters. The organic 

 matters diifer widely from those which we observe in the 

 carboniferous limestone. I could detect no Productae, nor 

 any fragments of corals, or stems of crinoid animals, nor in 

 short, any decidedly massive production. Instead of these, 



