638 
INDEX    TO    NORTH    AMERICAN    GEOLOGY 
Paleontology— Continued. 
Genera  and  species  described — Continued. 
Billingsella       exporrecta       Linnarsson, 
Walcott,  12. 
exporrecta    var.     rugosicostata    n. 
var.,  Walcott,   12. 
harlanensis  n.  sp.,  Walcott,  12. 
hicksi   (Salter)   Davidson,  Walcott, 
12. 
highlandensis  Walcott.  Walcott,  12. 
liudstromi  Linnarsson,  Walcott,  12. 
major  n.  sp.,  Walcott,  12. 
obscura  n.  sp.,  Walcott,  12. 
orientalis  Whitfield,  Walcott.  12. 
plicatella  n.  sp.,  Walcott.   12. 
pumpellyi  n.  sp.,  Walcott,  12. 
retroflexa.   Matthew    (G.   F.),  20. 
richthofeni  n.  sp.,  Walcott,  12. 
romingeri  Barr,   Walcott,  12. 
•saffordi  n.  sp.,  Walcott,   12. 
salemensis  Walcott,   Walcott,   12. 
(Otusia)    sandbergi    Winch  ell, 
Walcott,   12. 
striata  n.   sp.,   Walcott,   12. 
whitfieldi  Walcott.  Walcott,   12. 
Bilobites  varica    (Con.),  Weller,  G. 
various,  Beecher,   1. 
Bison  Smith,  McClung.   1. 
kanseusis  n.  sp.,   McClung,  1. 
Bittium  Leach.  Arnold.  2. 
asperum  Gabb,  Arnold.  2. 
californicnm     Dall     and     Bartsch, 
Arnold.   2. 
(Elachista)     californicnm     n.     sp.. 
Dall  and  Bartsch,  1. 
lilosum   Gould,   Arnold.  2. 
quadrifilatum    Carpenter,    Arnold, 
2. 
rugatum  Carpenter,  Arnold.  2. 
(Styliferina)      tenuisculpta      Car- 
penter,   Arnold.    2. 
Williamson i  n.  sp.,  Arnold,  2. 
Blastomeryx   Cope,    Matthew    (W.    D.), 
14. 
gemmifer  Cope,  Matthew   (W.  D.), 
14. 
wellsi    n.    sp..    Matthew    ( W.    D. ), 
14. 
?  sp.,   Matthew    (W.  D.),  2. 
Blothrophyllnm   Billings,    Lambe,    2. 
conifernm  n.  sp.,  Greene,   1. 
decorticatum   Billings,   Lambe,   2. 
greenei  n.  sp.   (Rowley),  Greene,  2. 
houghto'ni      (Rominger),      Greene, 
11. 
Bolivina  d'Orbigny,  Bagg,  6. 
senariensis    (Costa),    Bagg,   9. 
beyrichii      var.      alata      Segnenza. 
Bagg,   6. 
dilatata  Reuss,  Bagg.  9. 
dilatata  var.  angusta  Egger,  Bagg, 
9. 
punctata   d'Orbigny,    Bagg,   9. 
punctata     var.     substriata     Egger, 
Lag-.   9, 
textilarioides  Reuss,  Bagg,  9. 
Paleontology— Continued. 
Genera  and  species  described — Continued. 
Bollia  Jones  and  Roll,   Grabau,   1. 
cornucopia?  n.   sp.,   Ruedemann,   2. 
symmetrica    (Hall),    Grabau,   1. 
Bolporites    americanus    Billings,    Rue- 
demann, 2. 
Bordenia,  n.  gen.,   Greene,  2. 
knappi  Hall,  Greene,  6. 
zaphrentiformis   n.   sp.,   Greene,   2. 
Boreodon    matutinus   n.   sp.,   Lambe,   3. 
matutinus     Lambe,     Stanton     and 
Hatcher,   1. 
Bornia  Philippi,  Arnold,  2. 
depressa  n.  sp.,  Glenn.  6. 
mactroides    (Conrad),   Glenn,   6. 
marylandica   n.   sp.,    Glenn,    6. 
retifera  Dall,  Arnold,  2. 
triangula  Dall,  Glenn,  G. 
Borsonia   Bella rdi,   Arnold,   2. 
Bothriolepis,  Patten.  1. 
coloradensis  n.  sp.,  Eastman,  1G. 
major   (Ag. ),  Eastman,   1G. 
Bothrodendron?  n.  sp.,  White   (D.),  10. 
Botryocrinus   americanus   n.   sp.,   Row- 
ley, Greene,  13. 
Bourdotia  Dall,  Dall,  8. 
Bottosaurus    perrugosus    Cope,    Lambe, 
3. 
Bowdenia  Dall,  Dall,  8. 
Brachauchenius  lucasi  n.  gen.   and  sp.. 
Williston,   14. 
lucasi  Williston,  Lucas,  17. 
Brachiocrinus    ( Herpetocrinus?)    nodo- 
sarius   Hall.  Talbot,  2. 
Brachiopteris  pinnata  Dn.,  var.  angus- 
tipinna   D.   W.,    White    (D.).   18. 
Brachiosaurus  Riggs,  Riggs,  9. 
altithorax,   Riggs,  G,  9. 
Brachybrachium  brevipes,   n.  gen.   and 
sp.,  Williston,  23. 
Brachyphyllum     crassicaule     Fontaine, 
Fontaine,   5. 
macrocarpum    Newb.,    Hollick,    11. 
macrocarpum  Newb.,  Berry,  6. 
mamillare    Brongniart,     Fontaine, 
1. 
?  storrsii  Ward  n.  sp.,  Fontaine,  2. 
Bradoria  n.  gen.,  Matthew    (G.  F.),  2, 
20. 
?  ornata,  Matthew  (G.  F.),  13,  20. 
#  rugulosa  n.  sp.,  Matthew   (G.  F. ), 
2,    13,    20. 
scrutator  n.  sp.,  Matthew   (G.  F.), 
2,  13,  20. 
vigilans  n.  sp.,  Matthew    (G.   F. ), 
2,  13,  20. 
vigilans  mut.  obesa,  Matthew    (G. 
F.),  20. 
Bradorona,  Matthew   (G.  F.),  20. 
observator    n.    sp.,    Matthew     (G. 
F.),   13. 
Bradoria  n.  gen.,  Matthew   (G.   F.).  2, 
observator   var.    benepuncta,    Mat- 
thew  (G.  F.),  20. 
observator    mut.    lsevis,    Matthew 
(G.  F.),  20. 
