Reviews — Geological Surre;/ of Canada. 139 



representing the genera Terehratula and Ehynclionella, one is a 

 Crustacean (Homolopsis), and the rest are MoUusca. The Cephalo- 

 poda are much more numerous, both in species and individuals, than 

 the Gasteropoda, and the Ammonites are specially abundant. The 

 latter seem to be remarkable for the presence of several species of 

 Desmoceras (inclusive of Puzozia), and for the absence of Baculites, 

 and of the numerous species of Pachydiscus which are so character- 

 istic of the Vancouver Cretaceous. The number of species ot 

 Pelecypoda appears to be much larger even than that of the 

 Cephalopoda. 



The Canadian species have been in many instances compared 

 with the original types contained in museums in the United States 

 and in Europe. Thus every effort seems to have been made to 

 ensure the utmost degree of accuracy in the identification of the 

 fossils described in this work, which, it may be mentioned, appears 

 fourteen years after the previous (third) part. The new species are 

 well illustrated in the seven lithographic plates by Mr. L. M. Lambe. 



3. — Genekal Index to the Eeports op Progress, 1863 to 1884. 

 Compiled by D. B. Dowling, B.A.Sc. Svo ; pp. 475. (Geological 

 Survey of Canada, Ottawa : S. E. Dawson, 1900.) 



THOSE who have researches to undertake in any subject having 

 a voluminous literature know well the value of that time-saving 

 adjunct, a good index. The arrangement of the one before us is as 

 follows : — Part I (pp. 5-20) contains the Eeports, so classified that 

 any country or district in a province can be found in its chronological 

 order, the counties being set alphabetically under their respective 

 provinces. The reports indexed date from 1863 (a summary from 

 the commencement of the Survey) to 1884. 



Part 11 (pp. 21-34) contains an alphabetical list of the " special 

 examinations " of ores, minerals, or fossils that have been subjected 

 to assay, analysis, microscopical examination, or scientific description. 



Part III (pp. 35-475) forms the great bulk of the volume, and 

 is termed "General Index to Reports, 1863-84." The arrangement 

 in this part under reference to a place is usually chronological, 

 commencing with the earliest, while under a subject the references 

 are alphabetical, or in the case of substances of frequent occurrence, 

 as gold, iron-ores, coal, etc., the localities may be grouped under 

 provinces. 



Special publications on palfeontology and botany, which are issued 

 by the Survey from time to time, are not included in this Index, 

 but the " List of Publications " brought out at intervals supplies 

 this deficiency. 



We doubt not that the present Index will prove of great use to 

 all who require to consult the publications of the Geological Survey 

 of Canada, and they will not be chary of their commendation of the 

 compiler whose zeal and industry made its completion possible. 

 May his example be followed by many ! 



Arthur H. Fookd. 



