warman.]  BULLETINS.  45 
134.  The  Cambrian  rocks  of  Pennsylvania,  by  Charles  Doolittle  Walcott.  1896. 
43  pp.,  15  pis.     Price,  5  cents. 
135.  Bibliography  and  index  of  North  American  geology,  paleontology,  petrol- 
ogy, and  mineralogy  for  the  year  1894,  by  Fred  Boughton  Weeks.  1896.  141  pp. 
Price,  15  cents. 
136.  The  ancient  volcanic  rocks  of  South  Mountain,  Pennsylvania,  by  Flor- 
ence Bascom.     1896.     124  pp.,  28  pis.  and  maps.     Price,  15  cents. 
137.  The  geology  of  the  Fort  Riley  military  reservation  and  vicinity,  Kansas, 
by  Robert  Hay.     1896.     35  pp.,  8  pis.     Price,  5  cents. 
138.  Artesian  well  prospects  in  the  Atlantic  Coastal  Plain  region,  by  Nelson 
I  b (ratio  Darton.     1896.     232  pp.,  19  pis.  and  maps.     Price,  20  cents. 
139.  Geology  of  the  Castle  Mountain  mining  district,  Montana,  by  Walter  Har- 
vey Weed  and  Louis  Valentine  Pirsson.  1896.  164  pp.,  17  pis.  and  maps.  Price, 
15  cents. 
L40.  Report  of  progress  of  the  division  of  hydrography  for  the  calendar  year 
L895,  by  Frederick  Haynes  Newell,  hydrographer  in  charge.  1896.  356  pp. 
Price,  25  cents. 
141.  The  Eocene  deposits  of  the  Middle  Atlantic  slope  in  Delaware,  Maryland, 
and  Virginia,  by  William  Bullock  Clark.  1896.  167  pp.,  40  pis.  Price,  15 
cents. 
142.  A  brief  contribution  to  the  geology  and  paleontology  of  northwestern 
Louisiana,  by  T.  Wayland  Vaughan.     1896.     65  pp.,  4  pis.     Price,  10  cents. 
143.  Bibliography  of  clays  and  the  ceramic  arts,  by  John  Casper  Branner. 
L896.     114  pp.      Price,  15  cents. 
144.  The  moraines  of  the  Missouri  Coteau  and  their  attendant  deposits,  by 
James  Edward  Todd.     L896.     71pp.,  21  pis.     Price,  10  cents. 
145.  The  Potomac  formation  in  Virginia,  by  William  Morris  Fontaine.  1896. 
I  19  pp.,  2  pis.      Price,   15  cents. 
1  Hi.  Bibliography  and  index  of  North  American  geology,  paleontology,  petrol- 
ogy, and  mineralogy  for  the  year  1895,  by  Fred  Boughton  Weeks.  1896.  130  pp. 
Price,  15  cents. 
1  17.  Earthquakes  in  California  in  1895,  by  Charles  D.  Perrine,  assistant  astron- 
omer in  charge  of  earthquake  observations  at  the  Lick  Observatory.  1896.  23 
pp.     Price,  5  cents. 
148.  Analyses  of  rocks,  with  a  chapter  on  analytical  methods,  laboratory  of 
the  United  States  Geological  Survey,  L880-1896,  by  F.  W.  Clarke  and  W.  F. 
Hillebrand.     L897.     306  pp.     Price,  20  cents.     (Out  of  stock.) 
L49.  Bibliography  and  index  of  North  American  geology,  paleontology,  petrol- 
ogy, and  mineralogy  for  the  year  1896,  by  Fred  Boughton  Weeks.  1897.  152 
pp.     Price,  15  cents. 
150.  The  educational  series  of  rock  specimens  collected  and  distributed  by  the 
United  States  ( Geological  Survey,  by  Joseph  Silas  Diller.  1898.  400  pp.,  47  pis. 
Price,  25  cents.      (Out  of  stock.) 
151.  The  Lower  Cretaceous  gryphseas  of  the  Texas  region,  by  Robert  Thomas 
Hill  and  Thomas  Wayland  Vaughan.     1898.     139  pp.,  35  pis.     Price,  15  cents. 
152.  A  catalogue  of  the  Cretaceous  and  Tertiary  plants  of  North  America,  by 
Frank  Hall  Knowiton.     1898.     247  pp.     Price,  20  cents. 
153.  A  bibliographic  index  of  North  American  Carboniferous  invertebrates,  by 
Stuart  Weller.     1898.     653  pp.     Price,  35  cents. 
154.  A  gazetteer  of  Kansas,  by  Henry  Gannett.  1898.  246  pp.,  6  pis.  Price, 
20  cents. 
155.  Earthquakes  in  California  in  1896  and  1897,  by  Charles  D.  Perrine,  assist- 
ant astronomer  in  charge  of  earthquake  observations  at  the  Lick  Observatory. 
1898.     47  pp.     Price,  5  cents. 
