134 Reviews — The TalcBoniograpliical Society of London. 



area, and that the upper beds of the formation are more recent than 

 in Derbyshire and Yorkshire, where the thickness of the Limestone 

 is very much greater. 



The sudden appearance of species in restricted areas, like those 

 found in the Upper Grey Limestone at Axton, in Flintshire, where 

 20 species occur, and at Graig-fawr, in the Middle White Lime- 

 stone, where six species occur, not found elsewhere in North Wales ; 

 and the early appearance of three species in beds of Black Limestone 

 and shale at the base of the Middle White Limestone at the Great 

 Orme's Head, seem to indicate migration from some other area. 

 The latter species are Orthis Michelinn, Spirifera humerosa, and 

 S. rotmidata. Spirifera humerosa had only been previously found at 

 Llangollen and in Flintshire, while S. rotundata was rare in North 

 Wales ; but none of the three species had been previously found 

 at a lower horizon than the Upper Grey Limestone. Prodiiclus 

 gigantens first appears in the Lower Brown Limestone, and very 

 large specimens occur within 50 feet from the base at Moel 

 Hiraddug, a few miles from Rhyl. The species occurs all through 

 the Carboniferous Limestone, and thousands may be seen in the 

 Upper Grey Limestone. 



In this paper the range of the species found is confined to North 

 Wales, bat when the subdivisions of the Carboniferous Limestone 

 in other paits of the country are worked out, and the species from 

 each tabulated, it will be interesting to compare the result with that 

 obtained in North Wales. 



Da IE AT- I E "VsT S. 



L — Publications of the Pal^ontogeaphical Society. Vol. l, 



1896. 



TTIHE fiftieth issue of this well-known Society maintains the high 

 J_ character of the previous annual volumes, and augurs well for 

 the future prosperity of this useful body. The volume contains, in 

 addition to the usual catalogue of memoirs already published, and 

 other matter of general interest, an extract from the Eeport of the 

 Council to the Annual General Meeting held on June 19, 1896. 

 This Report was noticed by ns in the Geological Magazine for 

 September last (Dec. IV, Vol. HI, 1896, pp. 385-388, PI, XIII) ; we 

 only call attention to it here in order to reproduce the portrait of 

 another of the founders of the Society therein referred to, namely, 

 Dr. J. Scott Bowerbank, F.R.S., F.G.S., who was Secretary from 

 May, 1847, to 1862, and President from 1865 to 1876. 



Like most of its predecessors the volume is a composite produc- 

 tion, containing — 



1. Part III oi "The Crag Foraminifera," by Professor T. Rupert 

 Jones, F.R.S., F.G.S. ; assisted by Messrs. H. W. Burrows, 

 C. D. Sherborn, F. W. Millett, R. Holland, and F. Chapman, 

 (pp. 211-314 and pis. ix-xii; the plates do not accompany this 

 part of the text.) 



