400  INDEX    TO    PUBLICATIONS    OF    U.    S.   GEOL.    SURVEY,      [bull.  177. 
Intermediate  series  of  Colorado GF  57,  pp  5,  8, 1 4 
International  Congress  of  Geologists,,  fifth  triennial  session,  at  Washington,  in 
August,  1891 Ann  13,  i,  p  128 
In  informational  shale  conglomerate  of  Connecticut Ann  21,  in,  pp  60-63 
Intrusion  in  Black  Hills,  history  of Ann  21,  in,  pp  282-283 
Intrusion  and  erosion,  experiments  illustrating Ann  21,  in,  pp  291-303 
Intrusive  rock,  analysis  of,  from  Montana,  near  East  Gallatin  River Bull  110,  p  52 
analysis  of,  from  Yellowstone  Park,  Electric  Peak Ann  12, 
i,  p.  627;  Mon  xxxn,  n,  p  83 
from  Yellowstone  Park,  various  localities Mon  xxxn,  n,  p  426 
Intrusive  rocks,  contact  metamorphism  not  marked  about Mon  xn,  p  308 
force  of  intrusion,  discussion  of Mon  xn,  pp  298-300 
of  Alaska Ann  21,  n,  pp  360-362,  370 
of  Black  Hills Ann  21,  in,  pp  163-303 
of  California,  Sonora  area Ann  17,  i,  p  663 
of  Colorado,  Aspen  district Mon  xxxi,  pp  45-53 
La  Plata  Mountains GF  60,  pp  8-10 
relation  of,  to  dome  structure  in  Rico  Mountains Ann  21,  n,  pp  24-25 
Mosquito  Range  and  Leadville  district  . .  .Ann  2,  p  226;  Mon  xn,  pp  295-306 
Rico  Mountains Ann  21,  n,  pp  29-32 
Telluride  quadrangle GF  57,  pp  6-7 
of  Michigan,  Crystal  Fallsdistrict Ann  19,  in,  pp  81-83;  Mon  xxxvi,  pp  187-265 
northern  complex Mon  xxvin,  pp  178-186 
of  Montana,  Fort  Benton  quadrangle GF  55,  p  4 
Little  Belt  Mountains Ann  20,  in,  pp  302-303,  313-316,  342-343,  349-360 
of  New  Jersey Bull  67 
of  Rocky  Mountains Mon  xn,  p  305 
of  Sierra  Nevada Ann  14,  n,  pp  470-483 
of  Wyoming,  Absaroka  district GF  52,  pp  5-6 
of  Yellowstone  Park,  Electric  Peak Ann  12,  i,  pp  582-632 
Gallatin  Mountains,  Bunsen  Peak  and  Mount  Everts Mon  xxxn, 
ii,  pp  80-88 
traps  of  New  Jersey Bull  67 
(See,  also,  Laccoliths.) 
Inundated  lands  in  the  several  States,  approximate  areas  of Ann  10,  i,  p  311 
Invertebrates,  fossil;  Aphidse,  American  Tertiary Ann  13,  n,  pp  341-366 
Aucella  of  California,  remarks  on  the  genus Mon  xm,  pp  226-232 
beetles,  Pleistocene,  of  Massachusetts,  Fort  River Mon  xxix,  pp  740-746 
Brachiopoda,  American,  synopsis  of,  including  bibliography  and  syn- 
onymy     Bull  87 
Brachiopoda  and  Lamellibranchiata  of  Raritan  clays  and  greensand  marls 
of  New  Jersey Mon  ix 
Bryozoa,  synopsis  of  American  fossil,  including  bibliography  and  syn- 
onymy  Bull  173 
butterflies  of  Colorado,  Florissant Ann  8,  i,  pp  433-474 
Cephalopoda  and  Gasteropoda  of  Raritan  clays  and  greensand  marls  of 
New  Jersey Mon  xvm 
cockroaches,  fossil,  North  American,  revision  of Bull  124 
Coleoptera,  adephagous  and  clavicorn,  from  the  Tertiary  deposits  at  Floris- 
sant, Colorado,  with  descriptions  of  a  few  other  forms 
and  a  systematic  list  of  nonrhynchophorous  Tertiary 
Coleoptera  of  North  America Mon  xl 
Coleoptera,  rhynchophorous,  Tertiary,  of  United  States Mon  xxi 
coral  faunas,  Eocene  and  Lower  Oligocene,  of  United  States,  with  descrip- 
tions of  a  few  doubtfully  Cretaceous  species Mon  xxxix 
