46 Oorre.spo}uh'nce — F. H. Coivper Reed. 



THE GENERA APATOEEFHALUS (BEOGGER) AXD TRAMORIA 



(REED). 



SiR^ — With reference to the fauna of the Waterford Ordovician 

 beds, it will be of interest to the readers of the Geological 

 Magazine to learn that Professor Brcigger informs me that the 

 trilobite which I have recently described (Q.J.G.S., vol. Iv, 1899, 

 p, 758, pi. xlix, figs. 14-16) as Tmmoria punctata, gen. et sp. nov., 

 belongs without any doubt to the genus Apatolcephahis, which was 

 establislied by him in 1896 ("Ueber die Yerbreitung der Euloma- 

 Niobe Fauna [der Ceratopygenkalkfauna] in Europa," Nijt Jfagazin 

 fur Naturvidenskaherne, Bd. xxxv, 1896, pp. 179-185, 200) for 

 a group of species related to Dilcellolceplialus occurring in the widely 

 distributed Euloraa-Niobe fauna. In this country this fauna is con- 

 tained l)y the Shineton Shales and the Tremadoc of North Wales. 

 The form named by Salter Conocoryphe invila belongs to this new 

 genus Apatolcephahis, and the following species from Europe and 

 America are also mentioned by Brogger as occurring in beds with 

 this Euloma-Niobe fauna:. — Apatolcephahis serratus, Boeck ; 

 A. angvsticauda, Ang. ; A. finalis, VValcott ; A. Schlotheimi, Billings ; 

 A. mogmjiciis, Billings. We have now to add Apatolcephahis pimctatus 

 to the above list, and the generic name Tramoria must be dropped. 



Professor Brogger adds that this identification lends important 

 support to my view that the fauna of the Waterfoi'd beds has a facies 

 resembling that of the homotaxial Scandinavian beds, especially of 

 the Asaphus Stage (Et. 3, Brogger). The occurrence of genera 

 characteristic of the Euloma - Niobe fauna in beds of a higher 

 stratigraphical horizon in Wales, and their association with a later 

 fauna of a different character in shallow-water deposits, are facts 

 also noticed by Brogger in the paper referred to. With regard 

 to the wide geographical distribution of this fauna and the presence 

 of its most characteristic genera of trilobites in distant areas, Brogger 

 shows that it extended from 65° N. lat. to 43° N. lat., and is repre- 

 sented not only in Sweden but at Hof in Bavai'ia, St. Chinian in 

 Languedoc, Shropshire, North Wales, and America, wherever the 

 bionomical conditions were favourable. No barrier, therefore, 

 between the Baltic and British provinces can have existed at 

 this time, and it is shown that the supposed distinct characters of 

 the trilobitic faiuias are based upon an erroneous separation of 

 genera and species owing to a want of acquaintance with foreign 

 specimens. F. K. Cowper Eeed. 



"WOODWARDIAN MuSEUM, CAMBRIDGE. 



November 29, 1899. 



THE GEOLOGICAL SURVEY OF EGYPT. 

 Sir, — Since the commencement of this Survey in October, 1896, 

 the officers attached have carried out a geological and topographical 

 reconnaissance over a large portion of the country, besides a certain 

 amount of more detailed work in some areas. During this time 

 many new facts have been brought to light, in numerous cases 



