346  BIBLIOGRAPHY    OF    NORTH    AMERICAN    GEOLOGY 
Walcott  (Charles  D. ) — Continued. 
5.  Outlook  of  the  geologist  in  America. 
Geol.  Soc.  Am.,  Bull.,  vol.  13,  pp.  99-118,  1902. 
Reviews  the  geologic  investigations  that  have  been  undertaken  in  North  America,  by  organi- 
zations and  individuals,  broadly  outlines  the  problems  that  are  being  studied,  and  dismisses 
the  future  prospects  of  geologists. 
6.  Cambrian  brachiopoda:  Acrotreta;  Linnarssonella;  Obolus;  with  descriptions  of 
new  species. 
U.  S.  Nat.  Mus.,  Proc,  vol.  25,  pp.  577-612,  1902. 
7.  Twenty-third  Annual  Report  of  the  Director  of  the  U.  S.  <  let  (logical  Survey  to  the 
Secretary  of  the  Interior. 
Washington,  Government  Printing  Office,  1902.    217  pp.,  26  pis. 
Gives  an  account  of  the  work  of  the  U.  S.  Geological  Survey  for  the  year  1901-2. 
8.  New  term  for  the  Upper  Cambrian  series. 
Jour.  Geol.,  vol.  11,  pp.  318-319,  1903. 
Proposes  the  term  Saratogian  for  Upper  Cambrian,  and  gives  a  list  of  formations  referred  to  it. 
9.  John  Wesley  Powell. 
Wash.  Acad.  Sci.,  Proc,  vol.  5,  pp.  99-130,  1  pi.  (por.),  1903. 
10.  Twenty -fourth  annual  report  of  the  Director  of  the  United  States  Geological  Sur- 
vey to  the  Secretary  of  the  Interior,  1902-3. 
Washington,  Government  Printing  Office,  1903.    302  pp.,  26  pis. 
Gives  an  account  of  the  work  of  the  U!  S.  Geological  Survey  for  the  year  1902-3.     Includes  a 
biographical  sketch  of  J.  W.  Powell. 
The  rules  governing  the  nomenclature  and  classification  of  geologic  formations  promulgated 
in  the  Tenth  Annual  Report,  pp.  63-79,  have  been  recently  revised  and,  as  re\  ised,  are  given 
in  this  report  on  pp.  21-27. 
11.  Twenty-fifth  Annual  Report  of  the  Director  of  the  United  States  Geological  Sur- 
vey to  the  Secretary  of  the  interior,  1903-4. 
Washington,  Government  Printing  Office,  1904.    388  pp.,  25  pis.  and  2  figs. 
Gives  an  account  of  the  work  of  the  U.  S.  Geological  Survey  during  the  fiscal  year  1903-4. 
12.  Cambrian  Brachiopoda  with  descriptions  of  new  genera  and  species. 
U.  S.  Nat.  Mus.,  Proc,  vol.  28,  pp.  227-337,  1905. 
13.  Twenty-sixth  Annual  Report  of  the  Director  of  the  United  States  Geological  Sur- 
vey to  the  Secretary  of  the  Interior,  1904-5. 
Washington,  Government  Printing  Office,  1905.    322  pp.,  25  pis.,  1  (i^. 
Outlines  the  operations  of  the  U.  S.  Geological  Survey  for  the  fiscal  year  ending  June  30,  1905. 
Waldo  (C.  A.). 
1.  Dikes  in  the  Oklahoma  Panhandle. 
Abstract:  Eng.cfc  Mg.  Jour.,  vol.  75,  p.  153,  1903;  Science,  new  ser.,  vol.  17,  p.  220,  1903;  Sci.  Am. 
Suppl.,  vol.  55,  p.  22647,  1903. 
Walker  (B.  E.). 
1.  List  of  the  published  writings  of  Elkanah  Billings. 
Can.  Rec.  Sci.,  vol.  8,  pp.  366-388, 1901. 
Walker  (Bryant). 
1.  On  the  shells  of  marls. 
Mich.  Geol.  Surv.,  vol.  8,  pt.  3,  pp.  97-102,  1903. 
Describes  the  occurrence  of  gastropodous  shells  in  Michigan  marl  deposits. 
Walker  (T.  L.). 
1.  The  Geological  Survey  of  Canada  as  an  educational  institution. 
Can.  Mg.  Inst.,  Jour.,  vol.  7,  pp.  435-449,  1904. 
Wallace  (E.  C),  Richardson  (Clifford)  and. 
1.  Petroleum  from  the  Beaumont,  Texas,  field. 
See  Richardson  (Clifford)  and  'Wallace  (E.  C),  1. 
