696 
INDEX    TO    NORTH    AMERICAN    GEOLOGY 
Paleontology— Continued. 
Genera  and  species  described — Continued. 
Pectunculus   veatchii    Gabb   sp.,    Whit- 
eaves,  12. 
Pelycodus  Cope,  Osborn,  11. 
frugivorus  Cope,  Osborn.  11. 
jarrovii  Cope,  Osborn,  11. 
tutus  Cope,  Osborn,   11. 
Pelecorapis  Cope,  Cragin,  1. 
microlepis  n.  sp.,  Cragin,  1. 
varius  Cope,  Cragin,  1. 
Pelycosauria,  Case,  2. 
Pelecyora  Dall,  Dall,  8. 
Pentacrinus   sp.    cf.    andrese   de   Loriol, 
Madsen,  1. 
Pentagonaster    browni    n.    sp.,    Weller, 
8. 
Pentagonia  unisulcata    (Conrad),   Kin- 
dle, 1. 
Pentamerella  arata    (Conrad),   Kindle, 
1. 
pavilonens"is  Hall,   Kindle,   1. 
thusnelda  Nettleroth,  Kindle,   1. 
Pentamerus  Sowerby,  Grabau,  1. 
circularis  n.  sp.,   Weller,   6. 
oblongus   Sowerby,   Grabau,   1. 
oblongus    v;ir.    compressa    n.    var., 
Kindle  and  Breger,   1. 
oblongus  var.  cylindricus  Hall  and 
Whitfield,  Kindle  and  Breger,  1. 
Pentrernites  Say,  Hambach,  1. 
abbreviatus    Hambach,    Hambach, 
1. 
altus  n.   sp.    (Rowley),   Greene,   2. 
angustus  n.  sp.,  Hambach,  1. 
bradleyi  Meek,  Hambach,   1. 
calycinus    Lyon,  Rowley,  Greene,  7. 
cavus  n.  sp.,  Ulrich,  8. 
cherokeus?      Troost,      Rowley, 
Greene,  7. 
chesterensis,      Hambach,     Rowley, 
Greene,  7. 
conoideus  Hall,   Hambach,   1. 
conoideus  Hall,  Rowley,  Greene,  7. 
conoideus   Hall,   Rowley,   4. 
conoideus  Hall,  Ulrich,  8. 
Pentrernites  conoideus  Hall,  Row- 
ley. Greene,  5. 
conoideus    var.     ampins    n.     var., 
Rowley,  Greene,  5. 
conoideus   var.    perlongus   n.    var., 
Rowley,  Greene,  5. 
florealis  v.   Schlotheim,   Hambach, 
1. 
florealis  Schlotheim,  Ulrich,  8. 
fohsi  n.  sp.,  Ulrich,  8. 
fohsi  var.  marionensis  n.  var.,  Ul- 
rich, 8. 
godoni  De  France,   Ulrich,  8. 
godoni  Defrance,   Rowley,   Greene, 
5. 
godoni    De  France,  Rowley,  Greene, 
7. 
kirki  n.  sp.,  Hambach,  1. 
koninckanus  Hall,  Rowley,  Greene, 
5. 
Paleontology — Continued . 
Genera  and  species  described — Continued. 
Pentrernites  koninckanus  Hall,  Rowley, 
Greene,  14. 
koninckanus  Hall,  Rowley,  Greene, 
7. 
leda  Hall,  Loomis,  4. 
obesus  Lyon,  Ulrich,  8. 
obesus  Lyon,  Rowley,  Greene,  7. 
obtusus  n.  sp.,  Hambach,  1. 
pyramidatus  n.  sp.,  Ulrich,  8. 
pyriformis  Say,  Ulrich,  8. 
pyriformis  Say,  Rowley,  Greene,  5. 
pyriformis  Say,  Hambach,  1. 
pyriformis  Say,  Rowley,  Greene,  7. 
robustus  Lyon,  Rowley,  Greene,  7. 
rusticus  n.  sp.,  Hambach,  1. 
serratus  n.  sp.,  Hambach,  1. 
sulcatus  Roemer,  Hambach,   1. 
sulcatus?  Roemer,  Rowley,  Greene, 
7. 
tulipaformis  n.  sp.,  Hambach,  1. 
turbinatus  n.  sp.,   Hambach,  1. 
sp.  ?,  Rowley,  Greene,  7. 
Tentremitidea   ( ?)    approximata  n.  sp., 
Rowley,  Greene,  5. 
?  dubia  n.  sp.,  Rowley,  Greene,  5. 
leda  ?  var.  magna  n.  var.,  Rowley, 
Greene,  5. 
Peraceras    superciliosus    Cope,    Osborn, 
34. 
Peratherium  titanelix  n.  sp.,  Matthew 
(W.  D.),  9. 
Pericyclus  Mojsisovics,   Smith    (J.  P.), 
3. 
blairi  Miller  and  Gurley,  Smith  (J. 
P.),  3. 
?  princeps  de  Koninck,  Smith   (J. 
P.),  3. 
Periploma  Schumacher,  Arnold,  2. 
Periploma  Schumacher,  Dall,  8. 
angulifera  Philippi,  Dall,  8. 
argentaria  Conrad,  Arnold,  2. 
collardi  Harris,  Dall,  8. 
peralta  Conrad,  Dall,  8. 
peralta  Conrad,  Glenn,  6. 
Peripristis     semicircularis     (Newb.     & 
W.),  Eastman,  5,  10. 
Perischodomus  M'Coy,  Klem,  1. 
illinoiensis    Worthen    and    Miller, 
Klem,  1. 
Perisphinctes   aguilerai   n.   sp.,   Cragin, 
-     2. 
clarki  n.  sp.,  Cragin,  2. 
felixi   Castillo  and   Aguilera,   Cra- 
gin, 2. 
potosinus    Castillo    and    Aguilera, 
Cragin,  2. 
schucherti  n.  sp.,  Cragin,  2. 
sp.  cf.  uanderi  d'Orbigny,  Madsen, 
1. 
Perissolax  tricarnatus   n.  sp.,   Weaver, 
1. 
Pernopecten     cooperensis     (Shumard), 
Weller,  2. 
Peromyscus  parvus  n.  sp.,  Sinclair,  0. 
