FOR    THE    YEARS    1001-1905,  INCLUSIVE. 
729 
Paleontology— Continued. 
Genera  and  species  described — Continued. 
Xenaspis  Waagen,  Hyatt  and  Smith,  1. 
marcoui  n.  sp.,  Hyatt  and  Smith,  1. 
Xenodiscus  Waagen,  Hyatt  and  Smith, 
1. 
hittneri  n.  sp.,  Hyatt  and  Smith,  1. 
Xenophora      conchyliophora       (Born), 
Martin  (G.  C),  5. 
Xenotherium   unicum    n.    gen.    and    sp., 
Douglass,  0. 
Xiphaetinus  Leidy,  Stewart,   1. 
audax    (Cope),  Stewart,   1. 
hrachygnathus     Stewart,     Stewart, 
1. 
lowii   Stewart,   Stewart.   1. 
Xiphias?  radiata   (Clark),  Eastman,  1. 
Xiphopeza  E.  Hitchcock,   Lull,   2. 
triplex  E.  Hitchcock,  Lull,  2. 
Xylophomya  n.  gen.,  Whitfield,  4. 
laramiensis  n.   sp.,   WThitfield.   4. 
Yoldia  Moller,  Arnold,  2. 
breweri  n.  sp.,  Dall,  10. 
cooper i  Gabb,  Arnold,  2. 
diminutiva  n.  sp.,  Whiteaves       12. 
emersonii  n.   sp.,  Dall,   10. 
glabra  Beede  and  Rogers,  Beede,  1. 
lsevis  (Say),  Glenn,  6. 
knoxensis  (McChesney)  ?,  Beede,  1. 
palachei  n.  sp.,  Dall,  10. 
scissurata  Dall,  Arnold,  2. 
subscitula     (Meek     and     Hayden ) . 
Beede,  1. 
Yuccites     hettagensis     Saporta?,     Fon- 
taine,  1. 
Zacanthoides  (Olenoides)  spinosus  Wal- 
cott,    Woodward    (H.),    1. 
Zamia  washingtoniana  Ward,  Fontaine, 
5. 
Zamiopsis  insignis  Fontaine,   Fontaine, 
5. 
Zamites  arcticus  GSppert,  Fontaine,  3, 
4. 
tenuinervis  Fontaine,   Fontaine,  3. 
Zaphrentis   Rafinesque,   Grabau,   1. 
Zaphrentis     Rafinesque     and     Clifford, 
Lambe,  2. 
affinis  Billings,  Lambe,  2. 
albacornis  n.   sp.,   Greene,   13. 
albus  n.  sp.,  Greene,  1. 
alveola tus  n.  sp.,  Greene,  13. 
amplexiformis  n.   sp.,  Greene,  5. 
caliculus  n.  sp.,  Greene,  15. 
callosus  n.  sp.,  Greene,  15. 
cassedayi  Milne  Edwards,   Greene, 
13. 
cingulosa   Billings,    Lambe,   2. 
clinatus  n.  sp.,  Greene,  14. 
compressa  Milne  Edwards,  Greene, 
13. 
curtus  n.  sp.,  Greene,  1. 
gibsoni  White,  Girty,  3. 
gigantea  Lesueur   (sp.),  Lambe,  2. 
halli  E.  &.  H.,  Greene,  13. 
incondita  Billings,  Lambe,  2. 
infiexus  n.  sp.,  Greene,  1. 
insolens  n.  sp.,  Greene,  1. 
Paleontology— Continued . 
Genera  and  species  described — Continued. 
Zaphrentis  intortus  n.   sp.,   Greene.    13. 
invaginatus  n.  sp.,  Greene,   13. 
lamasteri   n.  sp.,   Greene,   1. 
minas  Dawson,  Lambe,  2. 
mirabilis  Billings   (sp.).   Lambe,  2. 
neptun   n.   sp.,   Herzer,   5. 
obcurus  n.  sp.,  Greene,  2. 
patens  Billings.   Lambe,  2. 
prolixus  n.  sp.,  Greene,  11. 
pusillus  n.  sp.,  Greene,  1. 
cf.     racinensis     Whitfield,     Clarke 
and    Ruedemann,    1. 
roemeri  E.  &  H.?,  Weller,  <l. 
shumardi      Milne      Edwards      and 
Haime    (sp.),   Lambe,   2. 
stokesi  Milne  Edwards  and  Haime. 
Lambe,  2. 
strigatus  n.  sp..  Greene.  13. 
subcentralis  n.  sp.,  Greene.   1  !. 
tantilla  Miller,  Girty,  3. 
trisinuatus  n.  sp.,  Greene,  8. 
turbinati     (Hall),    Grabau.    1. 
weberi  n.   sp..   Greene,   7. 
sp.,  Girty.   3. 
sp.   undet..   Weller,   6. 
Zaphsalis    abradus    Cope,    Stanton    and 
Hatcher,   1. 
Zarhachis  flagellator  Cope.  Case,  9. 
tysonii   Cope,  Case,  9. 
Zatrachis,  Broili,  2. 
Zatrachys  crucifer  n.  sp..  Case.  5. 
Zeacrinus    commaticus    Miller,    Grabau, 
8. 
?  robustus  Beede,  Beede,   1. 
Zeuglodon     (Basilosaurus) ,     Lucas     (F. 
A.),    20. 
Ziphacodon    rugatus    Marsh,    Wortman, 
4. 
Zirphaea  Leach,  Arnold,  2. 
gabbii  Tryon,  Arnold,  2. 
Zizyphus  elegans  Hollick,  Hollick,  11. 
Zonitoides  bristoli   n.   sp..   Gulick,    1. 
Zygospira,   Beecher,   1. 
aquila  n.  sp.,  Sardeson,  9. 
nicolleti   (W.  &  S.),  Weller,  6. 
recurvirostra    (Hall),   Weller,  6. 
recurvirostris  Hall,  Ruedemann,  2. 
Panama. 
Current  notes  on  physiography,  Davis 
(W.  M.),  33. 
Geology  of  Isthmus  of  Panama,  Ed- 
wards  (H.  W.),  1. 
Geology  of  the  Isthmus  of  Panama, 
Hershey,  5. 
Manganese  industry  of  Panama,  Wil- 
liams   (E.   G.),   1. 
Pleistocene  Foraminifera  from  Panama, 
Cushman,   2. 
Pennsylvania. 
Accounting  for  the  depth  of  the  Wyom- 
ing buried  valley,  Lyman,  1. 
Age  of  the  coals  at  Tipton,  White  (D.), 
