li, r'n ,r ,,f lin; ,,t ( i ,<>l iXi'tcll I /itrfiif ,i ,; . ol»7 
Mini v;iiii)us stiigcs ill tlic clfvitriticatioii and decoiupusitioii ol an- 
•Jesitic lavas are represciitt'd. There are now no active volcanoes, 
neither are there any kaown records ol the occnrrence of earth- 
"juakes. The only inanifestation of the present activity of tiie inter- 
nal forces consists in the warm springs occurrini; in various parts of 
the })eninsula. There is a uotaMe lack of mineral wealth in tlie south- 
■ern part of Korea. 
Dixniiitiiui of ii niiiiirl.iilili mir (iiims uml .^jur/'is nf llrnrh tnpml ; lly 
Di. 1*. AViiiTKrEiJ}. (Trans. Amer. Ins. ^F. E. vol. \r\. pp. 1(14-107, [tlnte.) 
Snip/u'orn'l/ii holiriiiiKi>< lien, et sp. nov. Whitfield. This new brachio- 
l)od was collected by Dr. Arthur F. Wendtfrom the Devonian of Bolivia. 
Snipliiociilid beloniis to tlie Terebratulid.c. IJoth valves are |)licated, the 
Aeiitntl being strongly convex, the dorsal sulcatod, longitudinally aud 
angularly. The intfrnal ventral has a strong, deep triangular byssal 
•opening and muscular scar: ilorsal strong crui'al jirocesses: the looj) 
is unknown. Shell structure strongly fibrous, without any piuicta- 
under a liand magnifier. The type is three and a half inches long and 
two inches wide. 
I'hi I'li/iisi. /iiih'rt'ii, S//i(r //(.strirf : l\y Anvwvu F. Wknki. (Trans. 
Amer. Ins. M. E. vol. \ix, pp. t4-104.) 
This jiaper is an exhaustive rr-port on the nuniiig, metallurgy, geol 
•<'>gy. etc.. of this famous silver district, Tlie city of Potosi is built on 
the very terminus of the glacial drift where it covers the Jurassic. The 
principal mines near the city are in a dyke of rhyolite, which is perhaps 
•I mile wide and lioun<ied on the east and west by the Tertiary. The 
northern ends of the veins strike into the Jurassic rocks. The author is 
of the opinion that the.se veins are very modern ami were still in course 
of deposition during the glacial period of IJolivia. Further, he "would 
not be surprised if, on further careful study, it should be determined 
that the age of many silver deposits of the Xorth aud Soiitli American 
<-()ntineuts is as modern as the .-idvent of man." 
h\,ssil lioliinn : \\\ II.(;i:ai- /.i Soui s-Laiiiai ii. Kiiglish translation 
by IlENiiV K. F. (lAKiisKV. Revised l)y Isaac li. l»Ar,t-»iri!. Oxford. Clar 
^-ndoii Press, IHltl. pp. VFl and 401. ( New York: Macmillan cV Co.) 
Had it l)een tlie intention of the authors of this l)ook to have it used 
-as a text i)0ok, we should feel obliged to «-ondemn any smii use. on ac- 
<-oiint of tlie lack of sulHcieiit illustrations, so essential now-a-days to 
the successful use of a text iiook. " Fossil IJotany '' contains less than 
fifty illustrations, wiiereas a text liook should liave »-/ /(•<.•< inimber than 
oue-half its number of jiages. However, tlie aufiioi>- make no such 
<laiiii, their object being to make it an " Introduction to pal.cophytology, 
from the standpoint of tlie botanist" It is sup|)osed to meet the re 
<piirements of the botanist. This work on pala-obotany seems to be the 
first so far issued in which the bittanist finds himself superior to the 
paheoliotanist, and although a "' Fossil IJot.iiiy," |ial.eoliotaiiy in it be- 
•'•omes a secondarv consideration. 
