PalcBontology of Asia Minor. 117 



rVbS SedgioicJcii, Barrandia Cordai, Agnostus Maccoyi, Ampyx midiis, 

 and Trinucleus fimhriatus are found both at Builth and Abereiddy ; 

 Trinucleus Lloydii at Builth and Llangadoc. 



Of shells, BelleropJion hilohatus is found both in this subdivision 

 and the lower one. Abundant in the Caradoc, this shell lived into 

 the Lovs^er Llandovery period. £. perturhatus occurs in the slates 

 of Abereiddy. A gasteropod, MarcMsonia simplex ?, has lately been 

 found at Percerrig, near Builtli. 



From the same locality I have seen specimens of a Lingula very 

 like Lingula plumbea, Lingida Bamsayi is a common fossil at Abe- 

 riddy Bay ; and a species of Modiolopsis, called M. inflata by M'Coy, 

 represents the lam ell i branchiate shells. 



The notes on the Llandeilo flags that I have here brought before 

 the notice of geologists were made during a tour in South Wales. I 

 will add that I think it more than probable that if the group be 

 carefully examined in Shropshire and North Wales, the same dis- 

 tinction will be found to exist between the Upper and liOwer subdi- 

 visions of it. 



nsroTiCES oip DvcEnvcoii^s. 



1. pALiEONTOLOGY OF AsiA MlNOK. 



AsiE MiNEURE. Description physiqiie de cette contree, par P. de Tchihatcheff. — 

 PaUontohgie, par A. D'Archiac, P. Fischer, et E. De Verneuil. 8vo. Paris, 1866. 

 Ouvrage accompagne d'un Atlas grand in 4to. 18 plates. 



THE geological portion of this work, to be completed in two 

 volumes, by M. de Tchihatcheff, was intended to have been 

 issued at the same time with the Palasontological portion, but the 

 latter having been completed first, it was thought desirable to 

 publish it at once, as a delay of even a few months might have been 

 very prejudicial to it. The Geology is expected to be published in 

 the course of the present winter.^ 



An introductory chapter on the " General Palffiontological Eesults " 

 is given by M. D'Archiac, who prefaces it with a historical sketch of 

 the labours of previous investigators into the geology of this region, 

 from the times of Strabo, Aristotle, and Theophrastes, until when, 

 towards 1835, it was first scientifically explored by Messrs. Hamilton 

 and Strickland, Spratt, Edward Forbes, Ainsworth, and Ch. Texier. 



Devonian, Cretaceous, and Lower and Upper Tertiary formations 

 occupy the greatest geographical area ; Jurassic and Carboniferous 

 strata have only been observed in a few and very restricted localities, 

 while rocks of Silurian, Permian, and Triassic age have not at 

 present been determined. Quaternary deposits are spread over 

 the country in many places. 



Devonian. — Beds characterized by fossils, mostly belonging to 

 the Lower Devonian of Western Europe, are found in the North ; 



1 Since writing the above the first volume of the " Geology" has been published ; 

 we shall notice it in a future number of the Geological Magazine, after the issue 

 of the second volume. 



