724 
INDEX    TO    NORTH    AMERICAN    GEOLOGY 
Paleontology— Continued. 
Genera  and  species  described — Continued. 
Tricarpellites   pringlei   n.   sp.,   Perkins, 
13. 
rostratus  n.  sp.,  Perkins,  13. 
rugosus  n.  sp.,  Perkins,  13. 
seelyi  n.  sp.,  Perkins,  13. 
Triceratops,  Beasley,  2. 
brevicornus  n.  sp.,  Hatcher,  22. 
prorsus,  Gilmore,  4. 
prorsus,  Schuchert,  14. 
serratus  Marsh,  Lull,  1. 
Tricheehus  giganteus  ?  (De  Kay),  Case, 
9. 
Tricoelocrinus  woodrnani  M.  &  G.,  Row- 
ley. .1. 
Tridonta  Schumacher,  Dall,  8. 
Triforis  Deshayes,  Arnold.  2. 
adversa  Montagu,  Arnold,  2. 
Trigenicus    socialis    n.    gen.    and    sp., 
Douglass,  8. 
Trigeria  ?  curriei  n.  sp.,  Rowley,  1. 
lepida  Hall,  Raymond  (P.  E.),  3.  4. 
lepida     Hall,    mut.    pygmsea    now, 
mis,  4. 
Trigonia  calderoni   (Castillo  and  Agui- 
lera),  Cragin,  2. 
conferticostata  n.  sp.,  Cragin,  2. 
emoryi  Conrad,  Tones  (A.  W. ).  2. 
Trigonia  emoryi  Conrad,  Shattuck,  8. 
evansana  Meek,  Whiteaves.  12. 
goodellii  Cragin,  Cragin,  2. 
munita  n.  sp.,  Cragin,  2. 
praestriata  n.  sp..  Cragin,  2. 
proscabra  n.  sp.,  Cragin,  2. 
rudicostata  n.  sp..  Cragin,  2. 
undulata  Fromherz,  Madsen.  1. 
vyschetzkii  Cragin,  Cragin,  2. 
Trigonias  osborni  n.  sp.,  Lucas  (!•'.  A.), 
1. 
osborni  Lucas.  Hatcher,  3. 
Trigonoarca      decisa      i  Conrad)      var., 
Clark  and  Martin.  2. 
Trigonograptus  Nicholson.  Ruedemann, 
8. 
ensiformis  Hall  sp.,  Ruedemann,  8. 
Trihamus  E.  Hitchcock,  Lull,  2. 
elegans  E.  Hitchcock.  Lull,  2. 
magnus  C.  H.   Hitchcock.  Lull,  2. 
Triisodon    heilprianus    Cope,    Matthew 
(W.  D.),  1. 
Trimerella  boreaiis  n.  sp.,  Whiteaves,  3. 
equanensis  n.  sp.,  Whiteaves,  •">. 
si).  Kindle  and  Breger,  1. 
Trimeroceras  gilberti  n.  sp.,  Kindle  and 
Breger,  1. 
Triraeroeystis  n.  gen.,  Schuchert,  11. 
peculiaris  n.  sp..  Schuchert,  11. 
Trimerorhachis  Cope,  Broili,  2. 
insi.miis  Cope.  Broili.  2. 
insignis  i  ?)  Cope,  Case,  3. 
leptorhynchus  n.  sp..  Case,  3. 
Trinacromerum  Cragin,  Williston,  14. 
Trinucleus,  Beecher,  1. 
concent  ricus   (Eaton),  Weller,  0. 
Tilonyx  cellulosus  Cope,  Case,  9. 
Paleontology— Continued. 
Genera  <///</  species  described — Continued. 
Trionyx    foveatus    Leidy,    Stanton    and 
Hatcher,  1. 
foveatus  Leidy,  Lambe,  3,  5. 
vagans  Cope,  Lambe,  3,  5. 
vagans  Cope,   Stanton   and   Hatch- 
er, 1. 
Virginia  Clark,  Case,  1. 
sp..   Case.  !>. 
Triplecia  gracilis  n.   sp.,   Raymond    (1'. 
i:.).  l. 
Tripleurocrinus  n.  gen.,  Wood  (Elvria), 
levis  n.  sp.,  Wood   (Elvira),  3. 
Tristylotus  n.  gen.,  Parks,  <>. 
hexagonus  n.  sp..  Parks,  <*>. 
rhomboideus  n.  sp..  Parks,  6. 
Triticites  n.  gen.,  Girty,  9. 
secalicus  Say,  Girty,  9. 
Tritonium  Link,  Arnold,  2. 
centrosum  (Conrad),  Martin,  5. 
cerrillosensis   n.    sp.,    Johnson    (D. 
W.),  6. 
eocenicum  n.  sp..  Weaver,  1. 
gibbosus  Brodcrip,  Arnold.  L'. 
impressum  n.  sp.,  Weaver,  1. 
kanabense    Stanton,    Johnson     (  1  >. 
W.),  5. 
(Priene)    oregonensis  Redfield,  Ar- 
nold, 2. 
pulchrum  n.  sp..  Weaver.  1. 
showalteri     (Conrad),    Clark    and 
Martin,  2. 
Trivia  Gray.  Arnold,  2. 
californica  Gray,  Arnold,  2. 
solandri  Gray,  Arnold,  2. 
Trochactaeon      semicostatus      n.       sp., 
Whiteaves,  12. 
Trochita  alaskana  n.  sp.,  Dall,  10. 
Trochoceras  Hall,  Grabau,  1. 
costatum  Hall,  Clarke  and   Ruede- 
mann, 1. 
desplainense     McChesney,     Clarke 
and  Ruedemann,  1. 
(Sphyradoceras)    cf.    desplainense, 
McChesney  V,  Kindle  and  Breger, 
1. 
gebhardi  Hall.  Grabau,  1. 
Trochocyathus      clarkeanus      Vaughan, 
Vaughan,  1. 
Trocholites  Conrad,  Whiteaves,  13. 
ammonius  Conrad,  Whiteaves,  13. 
canadensis    Hyatt,    Whiteaves,    13. 
planorbiformis  Conrad.  Whiteaves, 
13. 
Trochonema    dispar    n.    sp..    Raymond 
(P.  E.),  7. 
emacerata    Hall    and    Whitf..    Kin- 
dle, 1. 
cf.  fatuum  Hall.  Clarke  and  Ruede- 
mann, 1. 
rectilatera     Hall     and     Whitfield, 
Kindle,  1. 
umbilicatum  Hall  sp.,  Ruedemann, 
2. 
