230 Heviews — Tornqiiisfs Trilohite Fmina. 



the division ■with Actinocamax ventricosus in the Kristianstad district. 

 Fifty-five species and varieties are enumerated in the accompanying 

 list, of which only a small proportion appears to be common to our 

 English Chalk. The genera represented are Crania (13 sp.) ; Bhyn- 

 cho7iella (10 STp.) ; Terebratula (12 sy>-)', Terebratitlina {& s^p.) ; Theci- 

 dium (3 sp.) ; and Lingul a, Waldheimia, Trigonosema and TerebrnteUa, 

 each vpith a single species. Lundgren acknowledges that he has 

 defined the species in a more limited sense than Davidson, and it is 

 quite possible that our great English authority would not entirely 

 indorse the specific value assigned to all the forms here described ; 

 still the characters assigned to the species and varieties are very care- 

 fully and fully enumerated, and as all the forms are thoroughly and 

 of necessity faithfully illustrated in the accompanying photographed 

 plates, the work will prove of great value in comparing the Creta- 

 ceous Brachiopoda of Sweden with those of our own and other 

 countries. Q. J. H. 



HI. — Undersokningar ofver Siljansomradets Trilobitsfauna aF 

 Sv. Leonh. Tornquist. Med tre Taflor. 



An Examination op the Trilobite Fauna of the District op 

 SiLjAN. By Sv. Leon Tornquist. With three Plates. 4to. 

 pp. 101. 



THIS monograph contains the results of a detailed examination of 

 the Trilobites discovered in the Silurian basin of Siljan in 

 Dalecarlia. In all 113 species and varieties are enumerated, includ- 

 ing many new forms, belonging for the most part to very minute 

 types, which have hitherto escaped notice, probably on account of 

 their small dimensions. As a general rule the Trilobites are very 

 fragmentary, and the descriptions mainly rest on their detached heads 

 and pygidia. A tabulated list shows their respective stratigraphical 

 distribution in the series of beds which range from the Phyllograptus- 

 shales up to the Leptaena-Kalk, which the author believes to be 

 relatively slightly older than the Wenlock Shale. The new species 

 are all figured, and the careful manner in which the various forms 

 are described renders this work of special value for comparison to 

 students of this group, as it well illustrates the distribution of the 

 Trilobites in a particular limited area. Gr. J. H. 



IV. — Contributions to the Tertiary Geology and Paleontology 

 OP THE United States. By Angelo Heilprin. 4to. pp. 1-4 

 (unnumbered) and 1-117. One Plate. (Philadelphia, the 

 Author, 1884.) 



THE volume is a prefaced reprint of several independent treatises, 

 viz. — " I. The Tertiary Geology of the Eastern and Southern 

 United States" (Journ. Acad. Nat. Sci. Phil. 1884, 2nd ser. vol. ix. 

 pp. 115-154) ; "11. On the Relative Ages and Classification of the 

 Post-Eocene Tertiary Deposits of the Atlantic Slope " (Proc. Acad. 

 Nat. Sci. Phil. 1882, vol. xxxiv. pp. 150-186) ; " III. On the Strati- 

 graphical Evidence afibrded by the Tertiary Fossils of the Peninsula 



