634 
INDEX    TO    NORTH    AMERICAN    GEOLOGY 
and 
1. 
and 
Wil- 
Paleontology— Continued. 
Genera  and  species  described — Continued 
Aristolochites  dubius  n.  sp.,  Perkins,  13 
elegans  n.  sp.,  Perkins,   13,   17. 
excavatus,  n.  sp.,  Perkins,  13. 
globosus  n.  sp.,  Perkins,  13. 
irregularis  n.  sp.,  Perkins,  13. 
latisuleatus  n.  sp.,  Perkins,  13. 
majus  n.  sp.,  Perkins,  13,  17. 
ovoides  n.  sp.,  Perkins,  13. 
rugosus  n.  sp.,  Ferkins,  13. 
sulcatus  n.  sp.,  Perkins,  13,  17. 
Arpadites      Mojsisovics,      Hyatt 
Smith,  1. 
gabbi  n.  sp.,  Hyatt  and  Smith, 
Arretotherium    acutidens    n.    gen. 
sp.,  Douglass.  4. 
Arthracantha       punetobrachiata 
liams,  Wood   (Elvira).  :'.. 
Arthroclema    arruatum    Ulr.,    Sardeson, 
4. 
Arthrodendron  n.  gen.,  Ulrich,  4. 
diffusum  n.  sp.,  Ulrich,  4. 
Arthrophycus  Hall,   Grabau,  1. 
Arthr  phycus  Hall,  Sarle,  4. 
elegans  n.  sp..  Herzer,  2. 
harlani   (Conrad  i .  Grabau,  1. 
Asapbollus  homfrayi  var..  Matthew  <<;. 
P.),   1-.  20. 
(?)     planus    n.    sp.,    .Matthew     (G. 
F.),  12,  20. 
Asaphis  centenaria  (Conrad),  Glenn,  0. 
Asaphus  marginalis  Hall,  Raymond   ( 1'. 
E.),  5. 
sp.  alpha,  Raymond   (P.  E.),  .1. 
sp.  beta,  Raymond  (P.  E.),  5. 
sp.  gamma,  Raymond    (P.   E.),  5. 
Ascoceras  gibberosum  n.  sp.,  Sardeson, 
2. 
Ascodietyon   Nicholson   and   Etheridge, 
jr.,  Ulrich  and  Bassler,  1. 
floreale  n.  sp.,  Ulrich  and  Bassler, 
1. 
parvulum  n.  sp.,  Ulrich  and  Bass- 
ler, 1. 
siluriense   Vine,   Ulrich   and   Bass- 
ler, 1. 
sparsum   n.    sp.,   Ulrich   and   Bass- 
ler, 1. 
stellatum  Nicholson  and  Etheridge, 
jr.,  Ulrich  and  Bassler,  1. 
Ashmunella    thompsoniana     pecosensis 
n.   subsp.,   Cockerell,   1. 
Ashtarotha  Dall,  Dall,  8. 
Aspenites  n.  gen.,  Hyatt  and  Smith,  1. 
acutus,  n.  sp.,  Hyatt  and  Smith,  1. 
Asperipes  n.  gen.,  Matthew  (G.  F. ),  21, 
30. 
avipes  n.  sp.,  Matthew  (G.  F.),  21, 
30. 
caudifer  Dawson  sp.,  Matthew   <<;. 
P.),  30. 
flexilis  n.  sp.,  Matthew  (G.  F.),  30. 
Aspideretes  beecheri  n.  sp.,  Hay,  13. 
beecheri  Hay,  Hay,  15. 
Paleontology— Continued. 
Genera  end  species  described — Continued. 
Aspidites  Waagen,  Hyatt  and  Smith,  1. 
hooveri  n.  sp.,  Hyatt  and  Smith,  1. 
Aspidoeeras  alamitocensis  Castillo  and 
Aguilera,  Cragin,  2. 
Aspidonectes  tritor,  Hay,  16. 
Aspidosaurus    chiton    n.    gen.    and    sp., 
Broili,  2. 
Asplenium  magnum  Knowlton,  Hollick, 
subsimplex        (Lesq. 
Knowlton,  14. 
Knowlton, 
Astarte  Sowerby,  Arnold,  _. 
Astarte  Sowerby,  Dall,  8. 
section  Ashtarotha  Dall,  Dall,  8. 
section  Astarte  s.  s.,  Dall,  8. 
section       Crenimargo       Cossmann, 
Dall,  8. 
section  Digitaria  Wood,  Dall,  8. 
section  Gonilia  Stoliczka,  Dall,  8. 
section      Microstagon      Cossmann, 
Dall,  8. 
section  Neocrassina  Fischer,  Dall, 
8. 
section  Rictocyma  Dall,  Dall.  8. 
section  Tridonta  Schumacher,  Dall, 
8. 
(Goodallia?)      americana     n.     sp., 
Dall,  s. 
bayi  Lundgren,  Madsen,  1. 
(Crassinella)    branneri   n.   sp.,  Ar- 
nold, 2. 
breviacola  n.  sp.,  Cragin,  2. 
calvertensis  n.  sp.,  Glenn,  6. 
castrana  n.  sp.,  Glenn,  G. 
colieni  Conrad,  Dall,  8. 
concentrica  var.  bella  Conrad,  Dall, 
8. 
Astarte?  craticula  n.  sp.,  Cragin,  2. 
guneiformis  Conrad,  Glenn,  6. 
(Ashtarotha)    cuneiformis  Conrad, 
Dall,  S. 
(Ashtarotha)  distans  Conrad,  Dall, 
8. 
sp.  cf.  elegans  Sowerby,  Madsen.  1. 
evansi     (H.     and     M.)     Whitfield, 
Johnson  (D.  W.),  5. 
exaltata  Conrad,  Dall,  8. 
(distans     var.?)      floridana     Dall, 
Dall,  8. 
glenni  n.  sp.,  Dall,  8. 
hartzi  Lundgren,  Madsen,  1. 
isodontoides  n.  sp.,  Cragin,  2. 
laurentiana  Lyell,  Dall,  8. 
malolensis  Cragin,  Cragin,  2. 
marylandica  Clark,  Clark  and  Mar- 
tin, 2. 
meridionalis  Gabb,  Dall,  8. 
obruta  Conrad,  Glenn,  6. 
(Ashtarotha)  obruta  Conrad,  Dall, 
8. 
opulentora  n.  sp.,  Dall,  8. 
parma  Dall,  Glenn,  6. 
(Ashtarotha)  parma  n.  sp.,  Dall,  8. 
perplana  Conrad,  Glenn,  6. 
