620 
INDEX    TO    NORTH    AMERICAN    GEOLOGY 
Paleontology — Continued. 
Invertebrate — Continued. 
Structural  features  of  Homotrypa, 
Bassler,    1. 
Structure  and  affinities  of  Palseodiscus 
and  Agelacrinus,  Spencer  (W.  K.),  1. 
Structure  of  some  primitive  cephalopds, 
Ruedemann,  9. 
Studies   of   Gastropoda.   Grabau,    1,   11. 
Subdivisions  of  the  Ordovician  of  In- 
diana, Foerste,  9. 
Teredo-like  shell  from  Laramie  group, 
Whitfield,   1. 
Tertiary  fauna  at  Kap  Dalton,  Ravn,  1. 
Tertiary  fauna  from  Chappaquiddick 
Island,  Brown    (T.  C),  1. 
Tertiary  fauna  of  Florida.  Dall,  8. 
Texas  oil  well  fossil,  Aldrich,  1. 
Time  element  in  stratigraphy  and  cor 
relation,  Fall,  17. 
Time  element  i:i  stratigraphy  and  cor- 
relation, Ulrich,  9. 
Tobagan  fossils,  Guppy,  7. 
Torsion  of  the  lamellibranch  shell, 
Clarke  (J.  M.i,  17. 
Tracks  from  the  Knoydart  formation. 
Ami,  ::. 
Trenton  conglomerate  of  Rysedorph 
Hill.  Ruedemann,  2. 
Triassic  cep  al  pod  gene:  a,  Hyatt  and 
Smith,  1. 
Trilobite  (Dalmanites  lunatus)  from 
Littleton,  Lambert,  2. 
Trilobites  of  Chazy  limestone,  Ray- 
mond (P.  E.),  5. 
Triticites,  new  genus  of  Carboniferous 
foraminifers,  Girty,  9. 
Tropidoleptus  fauna  at  Canandaigua 
Lake.  Raymond   (P.  E.),  4. 
True  nature  of  Tamiosoma,   Dall,  7. 
Two  Carboniferous  genera,  Cockerell,  •".. 
Type  of  Avicnlipecten,  Girty,  8. 
Type  of  Avicnlipecten,   Hind,   1. 
Types  of  invertebrate  Cretaceous  fos- 
sils ia  the  collection  of  the  Academy 
of  Natural  Science,  Philadelphia, 
Johnson  (C.  W.),  2. 
Types  of  Maryland  Tertiary  mollusca 
in  British  Museum,  Newton,  1. 
Typical  species  and  generic  characters 
of  Avicnlipecten,  Girty.  7. 
Ueber  Pelecypoden-zonen  in  d  Trias 
Nord-An.erikas,  Smith  (J.  P.),  2. 
Uintacrinus,  Springer   (F.),   1. 
Uintacrinus  and  Hemiaster  in  the  Van- 
couver Cretaceous,   Whiten ves,   15. 
Upper  Permian  in  western  Texas, 
Girty.    2. 
Validity  of  Idiophyllum  rotundifolium, 
Sellards,  4. 
Variation  of  spiralia  in  Seminula  ar- 
gentia    (Shepard)    Hall,    Beede,   5,  7. 
Ventral       integuments      of      trilobites, 
Beecher,  4,  7. 
'  Worm    burrows    in    Chemung    of    New 
York,  Whitfield,  10. 
Paleontology— Continued . 
\~crt<bnitc. 
Additional      remarks      on      Diplodocus, 
Hatcher.  15. 
American  Eocene  primates,  Osborn,  11. 
American  Labyrinthodontidae,  Branson, 
2. 
American   Pelycosauria,  Case,   6. 
Ancestry  of  the  dogs,  Matthew  (W.  D.), 
13. 
Ancient  American  saurians,  Beard,  2. 
Arboreal  ancestry  of  the  Mammalia, 
Matthew  (W.  D.).  14. 
Arm  dillo  from  Middle  Ecc.ne,  Os- 
born, 30. 
Arthritis  in  the  Lansing  man,  Parker, 
1. 
Arthrodires  from  the  Cleveland  shale. 
Dean,  1. 
Astrodon  (ITeuroccelus)  in  the  Atlanto- 
saurus  beds  of  Wyoming,  Hatcher, 
10. 
Atlantosaur  and  Titanotherium  beds  of 
Wyoming,  Peck,  4. 
Bathygnathus  borealis  Leidy,  and  the 
Permian  of  Prince  Ed  ard  Island, 
Case,  13. 
Batraehian  footprints,  .Matthew  (G. 
P.).  22,  23,  30. 
Batraehian  footprints  of  Carboniferous 
system,  Matthew  (G.  F.),  21. 
Beitrag  zur  Kenntniss  von  Diplocaulus 
Cope,  Broili,  1. 
Bibliography  and  catalogue  of  fossil 
vertebrata,  Hay,  5. 
Bibliography  and  catalogue  of  fossil 
vertebrates,  Dean,  7. 
Biometric  evidence  in  problem  of  paired 
limbs  of  vertebrates,  Dean,  5. 
Bones  of  a  mastodon  found,  Gordon 
(It.),  1. 
Bones  of  forearm  in  Opisthoccelia,  Os- 
born, 37. 
I'.othriolepis,  Patten,  1. 
Braehiosaurus  altithorax,  Riggs,  6. 
Campy loprion,  a  new  form  of  Edestus- 
like  dentition,  Eastman,  3. 
Canidae  of  California,  Merriam  (J.  C), 
7. 
Carboniferous  cestraciont  and  acantho- 
dian  sharks,   Eastman,  6. 
Carboniferous  cpchliodonts,  Branson, 
1. 
Carboniferous  fish  fauna  of  Mazon 
Creek,  Eastman,  4. 
Carboniferous  fishes  from  central  West- 
ern States,  Eastman,  10. 
Ceratopsia  from  the  Laramie,  Wyo- 
ming,  Hatcher,   22. 
Ces'raciont  spine  from  Triasuc  <f 
Idaho,  Evans    (II.   M.),    1. 
Characteristic  types  of  American  dino- 
saurs, Beard,  1. 
Characters  of  Chelydosauria,  Case,  15. 
Characters  of  Mylostoma  Newberry, 
Dean,  2. 
