650 
INDEX    TO    NORTH    AMERICAN    GEOLOGY 
Paleontology— Continued. 
Genera  and  species  described — Continued. 
Crassatellites     (Scambula)     marylandi- 
cus  Conrad,  Dall,  8. 
marylandicus  (Conrad),  Glenn,  6. 
raelinus  (Conrad),  Glenn,  0. 
(Scambula)    melinus    Conrad    var. 
ineridionalis  Dall,  Dall,  8. 
(Micromeris)      minutissimus     Lea, 
Dall,  8. 
(Cuna)  parvus  Lea,  Dall,  8. 
(Scambula)       psychopterus      Dall, 
Dall,  8. 
(Crassinella)    tanicus  n.  sp.,  Dall, 
8. 
turgidulus  (Conrad),  Glenn.  6. 
(Crassinella)    triangularis    n.    sp., 
Dall,  8. 
undulatus    var.    cyclopterus    Dall, 
Dall,  8. 
sp.,  Clark  and  Martin,  2. 
Crataegus   flavescens   Newb.,   Knowlum. 
14. 
imparilis  n.  sp.,  Knowlton,  14. 
Crenella  gubernatoria  n.  sp.,  Glenn,  6. 
virida  n.  sp.,  Glenn,  G. 
Crenimargo,  Cossmann,  Dall,  8. 
Crenipecten  ballanus  Walcott,  Girty,  3. 
Creodonta,  Mattbew  (W.  D. ),  10. 
Creosaurus,  Osborn,  18. 
Creosaurus  Marsh,  Williston,  2. 
Crepidophyllum  Nicholson  and  Thomp- 
son, Lambe,  2. 
archiaci  Billings  (sp.),  Lambe,  2. 
colligatum    Billings    (sp.t.    Lambe. 
2. 
Crepidula  Lamarck,  Arnold,  2. 
aculeata  Gmelin,  Arnold,  2. 
adunca  Sowerby,  Arnold,  2. 
dorsata  Broderip,  Arnold,  2. 
fornicata  (Linne),  Martin,  5. 
grandis  Middendorff,  Arnold,  2. 
navicelloides  Nuttall,  Arnold,  2. 
onyx  Sowerby,  Arnold,  2. 
plana  Say,  Martin,  5. 
preerupta  Conrad,  Anderson,  7. 
precursor  n.  sp.,  Dall,  10. 
rugosa  Nuttall,  Arnold,  2. 
ungana  n.  sp.,  Dall,  10. 
Crepipora  venusta  (Ulrich),  Nickles,  6. 
Cribrilina  crassula  n.  sp.,  Ulrich,  2. 
modesta  n.  sp.,  Ulrich,  2. 
Cribroblastus,  Hambach,  1. 
incisus  n.  sp.,  Hambach,  1. 
schucherti  n.  sp.,  Hambach,  1. 
tenuis  n.  sp.,  Hambach,  1. 
tenuistriatus  n.  sp.,  Hambach,  1. 
verrucosus  n.  sp.,  Hambach,  1. 
Cricotillus  brachydens  n.  sp.,  Case,  3. 
Cricotus,  Broili,  2. 
Crisina   striatopora  n.   sp.,   Ulrich   and 
Bassler,  4. 
Cristellaria  Lamarck,  Bagg,  6. 
aculeata,  Guppy,  4. 
articulata  (Reuss),  Bagg,  9. 
cassis  (Fiehtel  and  Moll),  Bagg.  0. 
Paleontology — Continued. 
Genera  and  species  described — Continued. 
Cristellaria      crepidula      (Fiehtel     and 
Moll),  Bagg,  9. 
crepidula   (F.  and  M.)  var.  gladius 
Philippi,  Bagg,  9. 
cultrata   (Montfort),  Bagg,  6. 
(Robulina)     gerlandi    A  n  d  r  e  a  e, 
Bagg,  9. 
gibba    (d'Orbigny),   Bagg,   1,   9. 
radiata   (Bornemann),  Bagg,  1. 
rotulata  (Lamarck),  Bagg,  1,  9. 
rotulata,  Guppy,  4. 
wetherellii  Jones,  Bagg,  6. 
Crocodilus  humilis  Leidy,  Lambe.   3. 
humilis    Leidy.    Stanton    and    Hat- 
cher, 1. 
prenasalis  n.  sp..  Loomis,  5. 
Crossotelos  annulatus  n.  gen.  and  sp., 
Case,  3. 
Crossotheca  sagittata,  Sellards,  3. 
trisecta  n.  sp.,  Sellards,  3. 
Crotalocrinus  cora   (Hall),  Weller,  5. 
Crucibulum  Schumacher,  Arnold,  2. 
constrictum   Conrad,   Martin,   5. 
costatum   (Say),  Martin,  5. 
costatum     var.     pileolum     (H.     C. 
Lea),  Martin,  5. 
multilineatum   Conrad,   Martin.   5. 
"spinosum,   Sowerby,  Arnold,   2. 
Cryphaeus  boothi  var.  calliteles   Green. 
Loomis,   4. 
Cryptobium  cinctum  n.  sp.,  Scudder,  1. 
detectum  n.  sp.,  Scudder,  1. 
Cryptoblastus  melo  O.  and  S..  Rowley, 
4. 
Cryptocbiton  Midd.  and  Gray,  Arnold. 
2. 
stelleri  Middendorff,  Arnold,  2. 
Cryptodon  cfr.  unicarinatus  Nyst.   sp., 
Ravn,  1. 
Cryptomya  Conrad,  Arnold,  2. 
californica  Conrad,  Arnold,  2. 
Cryptonatica  Dall,  Arnold,  2. 
Cryptonella  lens  Hall,  Kindle,  1. 
ovalis  Miller,  Kindle,  1. 
Cryptozoon?  perkinsi  n.  sp.,  Seely,  5. 
Ctenacanthus,  Eastman,  6. 
amblyxiphias    Cope,    Eastman,    10. 
coxianus    St.    John    and    Worthen, 
Eastman,  6. 
decussatus  n.  sp.,  Eastman,  6. 
gracillimus   N.    and   W.,   Eastman, 
6. 
longinodosus  n.  sp..  Eastman,  0. 
lucasi  n.  sp.,  Eastman,  6. 
semicostatus  St.  John  and  Worth- 
en,  Eastman,  0. 
solidus  n.  sp.,  Eastman,  6. 
spectabilis  St.  John  and  Worthen, 
Eastman,   6. 
varians    St.    John    and    Worthen, 
Eastman,  6. 
venustus  n.  sp.,  Eastman,  6. 
sp.  indet.,  Eastman,  6. 
Ctenichnites    bisulcatus    n.    sp.,     Mat- 
tbew (G.  F.),  20. 
