424 Hevieirs — M. R. Fourtau — Egyptian Echinoids. 



Dr. T. r. Sibly in a small part of Somerset (at Worle Hill and 

 Middle Hope) that is included in the Cardiff map. Further particulars 

 are also given of the volcanic rocks of Somerset, of the Iveuper and 

 llhfetic beds, the Lias, and superficial deposits. Records of new 

 well-borings are added, and the geological bibliography of South 

 Wales and Monmouthshire has been brought up to date. 



III. — The British CarbokifekoxtsTkepostomata. By G.W. Lee, D.Sc. 

 Being vol. i, pt. iii of Memoirs of the Geological Survey of 

 Great Britain. Palaeontology, pp. 135-95 and pis. xiv-xvi. 

 4to. 1912. Price 3«. 



TMHE Trepostomata, which form a sub-order of the Bryozoa, are 

 J_ abundant in Palaeozoic rocks of different regions, but in their 

 study there is " absolute need of thin sections and careful micro- 

 scopical examination". Dr. Lee now distinguishes twenty-three 

 species, of which twenty are new and three previously described. 

 These are referred to already known genera ; while one species is 

 constitiited the type of a new genus under the name Koninchopora 

 inflaia (de Koninck), a form referred to Calamopora by de Koninck, 

 and to Stenopora by M'Coy. The species occur in the Lower 

 Carboniferous rocks, and have been obtained from sundry localities 

 in the west and north of England, Scotland, South AVales, the 

 Isle of Man, and Ireland. 



Egyptian Echinoids. 



IV. — jS'otes sue les EcHiNroEs FossiLES DE l'Egxpte. Par M. R. 

 Fourtau. Bull. Inst. Egyptian, ser. v, tome v, pp. 137-76, 

 pis. i-iv. 8vo. 



OUR knowledge of the Echinoid fauna of the Upper Cretaceous 

 is derived to n surprising degree from the discoveries that have 

 been made in the Mediterranean region. Numerically, Echinoids are 

 sufficiently abundant in the Chalk of jSTorthern Europe, but their 

 differentiation into genera and species is proportionately small when 

 contrasted with the wealth of variety among those found in tlie belt 

 of country between Algieria and Persia. Although the researches of 

 Pomel and Cotteau, Perou and Gaiithier for Algieria, of the last- 

 named for Tunis and Persia, and of Fourtau for Egypt, are both 

 admirable and bulky, they represent the results of but few and 

 spasmodic expeditions when compared with the prolonged and 

 persistent investigations that have been undertaken in Europe. 



The maximum of specific differentiation in the Mediterranean 

 Upper Cretaceous seems to have been attained by three groups of 

 Echinoids. For the Regularia, Cyphosoma and its allies show the 

 greatest variety; for the Holectypoida, Coenliolectypns; and for 

 the Spatangoida, Uemiaster. In the case of the last-named genus 

 there have already been described a bewildering number of species, 

 and hardly any paper dealing with the Echinoids of the region 

 appears without some addition being made to the list. 



