230 Reviews — Coal of Pallasca, Huaylas, and Yungay. 



Albian age, and that only one horizon is represented in the series. 

 He thinks that the presence of Placenticeras mintoi, Yredenburg, 

 confirms the reference of the beds to the Albian stage, since this 

 Ammonite is related to P. uhligi, Choffat, from the Bellasian of 

 Portugal, and to P. saadense, Peron & Thomas, from the Vraconnian 

 of Northern Africa. 



M. Fourtau gives a careful description of the eight species found in 

 the Bagh Beds. He identifies Duncan's Cidaris namadieus [sic ; the 

 termination should be feminine] as a true JDorocidaris. In the case of 

 Salenia fraasi the original diagnosis by Cotteau was not precise, hence 

 later workers were misled, but M. Fourtau now shows that the form 

 from the Bagh Beds is not the same as that from the Aptian of Lebanon. 

 The new name S. Iceatingei is proposed for the species described by 

 Duncan, which is regarded as closely comparable with S. mamillata, 

 Cotteau, from the Aptian of France.. The Cyphosoma from the Bagh 

 Beds, which Duncan determined as C. cenomanense, Cotteau, is now 

 called C. namadicum, n.sp.,and the nearest related species is C.peroni, 

 Cotteau, from the Barremian of France and Switzerland. The name 

 Orihopsis indica, Duncan, still stands; the species is now compared 

 with 0. repellini, Desor, from the Barremian and Aptian of France, 

 Switzerland, and Portugal. M. Fourtau regards the two large 

 specimens of Eehinobrissus goybeti, Duncan non Cotteau, and the two 

 small deformed E. similis, Duncan non d'Orbigny, as of the same 

 species, and proposes the new name E. haydeni. The nearest allied 

 species is E. eddissensis, Gauthier, from the Aptian and Albian of 

 Algeria and Tunis, Henriaster cenomanensis, Duncan non Cotteau, is 

 redescribed as H. oldhami, n.sp., and the most closely related species 

 is H. luynesi, Cotteau, from the Cenomanian of Palestine. Other 

 examples of Semiaster were referred by Duncan to IP. similis, 

 Orbigny, of which a figure was subsequently reproduced by 

 Mr. R. D. Oldham in his Geology of India. Of the five specimens 

 sent to M. Fourtau, three are separated and. described as Opisaster 

 subsimilis, n.sp., and regarded as related to 0. morgani, Cotteau and 

 Gauthier, from the Senonian of Persia. The other two are described 

 as Opisaster, sp. indet., a form related to 0. vignesi, Cotteau, from 

 the Cretaceous of Palestine. 



C. P. C. 



II. — Yacoiientos Carbon if eros de las Provincias de Pallasca, 



Huaylas y Yungay. By Juan M. Yanez Leon. Boletin del 



Cuerpo de Ingenieros de Minas del Peru, No. 90, pp. 85, with 



5 plates and 2 maps. 1918. 



TI1HE stoppage of the import of foreign coal into Peru has served 



JL to call attention to the potential value of native supplies, and 



in this memoir the author gives an account, both scientific and 



economic, of the large supplies of high-grade coal that exist in the 



provinces of Pallasca, Huaylas, and Yungay. The coal occurs in 



strata of Lower Cretaceous (Wealden) age, forming three seams 



averaging about 1, 2, and 1 metres respectively, separated by 



varying thicknesses of sandstones, shales, and limestones. As 



shown by the sections given the strata are considerably folded, and 



