184 The Aiuei'ica)i Geologist. September, i8«ii 
on the crystalline schists b\- Hunt, Heim, Lor}% Lehmann, L<5vv, Lawson,. 
Powell, Irving, Chamberlin, Van Hise, Becker, Dutton, Lossen, and 
Reusch, followed by synopsis of the discussion on the same by many of 
the attending geologists. Following these are miscellaneous discussions 
of the classification of the Cambrian-Silurian-Taconic, or primordial 
rocks of the world, and of the Tertiary and Quaternary. Part IV em- 
braces extended papers on the geology of the different portions of the 
British islands by Hicks, Marr and Tiddeman, Strahan and Reid, 
Fox-Strangways and Lamplugh, and Reid, and shorter notes 
by Topley, Drew, Goodchild, Blake, Woodward and Winward — 
all grouped under the general title " Explication des Excursions." 
Appendix A consists of the report of the American Committee on classi- 
fication and nomenclature, the reporters being Frazer, Winchell, Wil- 
liams, Stevenson, Cook, Smith, Cope and Hitchcock. Appendix B is the 
report of the British sub-committees made to the third session of the 
Congress at Berlin in 188."), distribiited at that time separately, but 
omitted from the Compte rendu of the session. It now appears as a 
" second edition," with an explanatory " review of the ])osition " by T. 
McKenny Hughes, the separate reporters being Woodward, Reid, Gard- 
ner, .Jukes-Browne, Topley, Huddleston, Blake, Irving, Morton, Strahan 
and Marr. Appendix C is the report of Prof. Dewalque, secretary of the 
international committee on unification of nomenclature, in which he says 
that no national committee, except that of the United States, had rendered 
any report to the general committee. He calls attention specially, and fa- 
vorably, to the recommendation of the American committee respecting the 
nomeuclature of the lower paleozoic, viz: Tucoair for the primordial, 
Ciiinhri'ia for the second fauna, and ,Sllni"i((/i. for the third fauna. At 
another time (in the discussion of the classification of the Cambrian- 
Silurian-Taconic, p. 227,) Prof. Dewalque commends the conclusions of 
the American committee in the following terms: 
Les riiunions pr<^c(?dentes du congr&s et de la commission de nomeucla- 
ture ont montr*'- qu' uue tr&s-grande majorit(i de g^ologues est favorable 
il une division en trois parties; on constate le meme fait aujourd'hui. 
Pour ces parties on a propos<'' les noms Cambrien, Ordovicen et Silurien. 
L'orateur ne pent etre consider*^ comme hostile t"i TOrdovicen car il a 
eu Thonneur de le patronner dans la commission, (jui I'a admis. Toute 
fois, dans son rapport pour le congr^s de Berlin, il a cru devoir 
tenir compte des revendications produites en Am^rique au sujet du 
Taconique de M. Emmons. Les controverses qui se sout produites 
depuis lors aux Etats-Unis auraient pu faire hesiter vm g(^ologue comme 
l'orateur, qui n' a jamais vu ce pays; mais la lecture du rapport du 
comity- Amt'ricain sufiit, ;i ses yeux, pour lever tous les doutes, et le nom 
de Taconique a pour lui la priority et a droit il d(''signer la division in- 
f<?rieure. La division moyenne est le Cambrienne, la sup(''rieure reste 
Silurienne. Cela contrariera quelques usages, mais cela a d'autres 
mi'rites sur lesquels l'orateur n'insiste pas. 
L'honorable M. Walcott aconibattucette division, propos<?e par ses com- 
patriotes; mais son argumentation ne parait pas irr<?futable. L'orateur- 
