Reviews — Carboniferous Limestone, Cracoic. 375 



yielding a different set of fishes from that of the Thurso flagstones. 

 The same fauna has now heen found near Latheron on the southern 

 coast of Caithness, and its stratigraphical position has been determined 

 to be beneath that of the Thurso flagstones (of Sir A. Geikie) which 

 form the higher portion of the upper or Coccosteus group of the 

 Caithness flagstones. 



It is to be hoped that Mr. H. A. Allen's valuable Catalogue of 

 Types and Figured Specimens preserved in the Museum of Practical 

 Geology will be continued in future numbers of the Summary of 

 Progress. 



II. — Steatigraphie des Kohlenkalks in deh Umgebung von Krakau. 

 [The Stratigraphy of the Carboniferous Limestone in the 

 Neighbourhood of Cracow.] By J. Jarosz. Extr. du Bull, de 

 I'Academie des Sciences de Cracovie (pp. 689-706), Avril, 1909, 

 Cracovie. 

 ri'^HIS paper commences with the geographical delimitation of the 

 _L district under consideration and a short historical sketch of the 

 ■work of previous investigators. Then follows the petrographical and 

 palseontological characteristics of a series of exposures. The examina- 

 tion of the Brachiopods from these exposures points to the presence of 

 two distinct faunas of different horizons and occurring in beds 

 petrographically distinct from one another. The one horizon is 

 distinguished by more or less dark limestones, often bituminous and 

 containing here and there an abundance of chert. This limestone 

 contains at one place (Szklarka-Tal) a thin crinoidal band comparable 

 to the petit granite of the lower horizon in Belgium. Porms which 

 are peculiar to this horizon are Athyris roissyi, A. squamigera, 

 A. lamellosa, Spirifer tornacensis, Spi cinctus, Syrhigothyris cuspidata, 

 Productus margaritaceus, Pr. spimdostis, Pr. mesolohus, Chonetes 

 hardrensis, Lingula credneri, Piscina davreuxiana. The other horizon 

 is characterized for the most part by light-coloured, compact or 

 granular limestones, often becoming whitish, yellowish, or bluish-grey, 

 and sometimes also massive and reddish. Among forms peculiar to 

 this horizon are Dielasma sacculus, Athyris expansa, A. glohularts, 

 A. subtilita, Spirifer duplicicosta, Sp. trigonalis, Sp. ovalis, Spiriferina 

 cristata, Rhynchonella acuminata, Kh. pugnus, Rh. pleurodon, Rh. 

 angulata, Productus giganteus, Pr. latissimus, Pr. costatus, Pr. nndatus, 

 Pr. ivrigUii, Pr. nystianus, Pr. aculeatus, Pr. punctatus, Chonetes 

 comoides, Ch. papilionacea, etc. After a comparative examination of 

 the faunas and those of Belgium the author correlates the two horizons 

 mentioned, the first with that of Tournay, the second with that 

 of Vise. 



The paper is accompanied by a plate of fossil illustrations and 

 a sketch-map of the district. 



I. T. 



III. — The Darwin Centennial Commemoration. 



ON July 1 of last year the Linnean Society held a special meeting 

 to celebrate the fiftieth anniversary of the reading of the papers 

 on " Natural Selection " by Charles Darwin and Alfred Eussel Wallace. 



