FOR   THE    YEARS    1901-1905,  INCLUSIVE. 
691 
Paleontology— Continued. 
Genera  and  species  described — Continued. 
Orthis  tricenaria  Conrad,  Weller,  G. 
tricenaria  Conrad,  Ruedemann,  2. 
See  also  Plectorthis. 
Orthisina     alberta     Walcott,     Matthew 
(G.   F.),   10. 
Orthoceras  Breyn,  Grabau,  1. 
Orthoceras  Breyn,  Hyatt  and  Smith,  1. 
algomense  n.  sp.,  Parks,  5. 
annulatum  Sowerby,  Grabau,  1. 
(Kionoeeras)    angulatum    Wahlen- 
berg,  Kindle  and  Breger,  1. 
(Dawsonocera#s)       cf.      annulatum 
Sowerby,  Kindle  and  Breger,  1. 
(Dawsonoceras)     annulatum     var. 
americauum    Foord,    Kindle   and 
Breger,  1. 
caldwellensis    Miller    and    Gurley, 
Kindle,  1. 
crebescens  Hall,  Clarke  and  Ruede 
mann,  1. 
(Kionoeeras)     delphiensis     n.     sp., 
Kindle  and  Breger,  1. 
ekwanense  n.   sp.,   Whiteaves,   17. 
extremum  n.  sp.,  Parks,  5. 
indianense  Hall,  Weller,  2. 
(Kionoeeras)   kentlandensis  n.  sp.. 
Kindle  and  Breger,  1. 
mareellense    Vanuxem,    Wood    (El- 
vira), 1. 
medullare  Hall,  Grabau,  1. 
medullare  Hall,  Kindle  and  Breger, 
1. 
minnesotense  n.  sp.,  Sardeson,  1. 
multiseptum  Hall,  Grabau,  1. 
(Geisonoceras)      niagarense     Hall, 
Kindle  and  Breger,  1. 
nuntium  Hall,  Loomis,  4. 
(Kionoeeras)     orus     Hall,     Kindle 
and  Breger,  1. 
primigenium  Vanuxem,  Cleland,  3. 
pulcher  n.  sp.,  Parks,  5. 
rectum       Worthen,       Clarke       and 
Ruedemann,  1. 
scintilla   Hall    (?),   mut.   mephisto 
Clarke,  Loomis,  4. 
shastense  n.  sp.,  Hyatt  and  Smith. 
1. 
subulatum     Hall,     mut.     pygmaeum 
nov.,  Loomis,  4. 
tenuistriatum   (Hall),  Weller,  6. 
tenuitextum   (Hall),  Weller,  6. 
thoas  Hall,  Kindle,  1. 
trusitum  n.  sp.,  Clarke  and  Ruede- 
mann,   1. 
sp.,  Parks,  5. 
sp.,  Kindle,   1. 
sp.  undet.,  Sardeson,  1. 
sp.  undet.,  Weller,  G. 
Orthodactylus  E.  Hitchcock,  Lull,  2. 
iioriferus  E.  Hitchcock,  Lull,  2. 
introvergens  E.  Hitchcock,  Lull,  2. 
linearis  E.  Hitchcock.  Lull,  2. 
Orthodesma  canaliculatum  Ulrich,  Wel- 
ler, 6. 
Paleontology— Continued, 
Genera  and  species  described — Continued. 
Orthonychia  formosa  Keyes?,  Girty,  3. 
obtusa  n.  sp.,  Whiteaves,  17. 
Orthostropia  Hall,  Grabau,  1. 
(  ?)  fasciata  Hall,  Grabau,  1. 
strophomenoides  (Hall),  Weller,  6. 
Orthosurcula  n.  gen.,  Casey,  5. 
Orthotheca    bayonet    n.    sp.,    Matthew 
(G.  F.),  1. 
cylindrica  Grabau,  Sears,  1. 
emmonsi  Ford,  Sears,  1. 
pugio  n.  sp.,  Matthew   (G.  F.),  1. 
sica  n.  sp.,  Matthew  (G.  F.),  1. 
stilletto,  Matthew  (G.  F.),  1. 
Orthothetes  Fischer  de  Waldheim,  Gra- 
bau', 1. 
•bellulus  Clarke,  Raymond   (P.  E.), 
3,  4. 
chemungensis     Conrad,     Raymond 
(P.  E.),  4. 
chemungensis      var.      arctistriatus 
Hall,  Raymond  (P.  E.),  3. 
chemungensis     arctistriatus     Hall, 
Kindle.    1. 
chemungensis  var.  pectinacea  Hall, 
Raymond  (P.  E.),  3. 
deckerensis  n.  sp.,  Weller,  G. 
hydraulicus  Whitfield),  Grabau,  1. 
inspqualis   (Hall),  Weller,  2. 
inflatus?   (W.  and  W.),  Weller,  2. 
inaequalis  Hall,  Girty,  3. 
interstriatus   (Hall),  Weller,  6. 
minutus  n.  sp.,  Cumings,  2. 
pandora    (Bill.),    Weller,   G. 
subplanus  Conrad,  Kindle  and  Bre- 
ger, 1. 
subplanus  Conrad  1842,  Beecher,  1. 
subplanus  (Conrad),  Grabau,  1. 
woolworthanus  Hall,  Shimer,  5. 
woolworthana   (Hall),  Weller,  6. 
sp.  undet.,  Weller,  2,  6. 
Orthotichia  schuchertensis  n.  sp.,  Girty, 
3. 
Orusia  n.  subg.  of  Orthis,  Walcott,  12. 
Orycterocetus  Leidy,  Case,  9. 
crocodilinus   (  ?)    Cope,  Case,  9. 
Oryctomya  claibornensis  Dall,  Dall,  8. 
Oscilla  A.  Adams,  Arnold,  2. 
Osmeroides  Agassiz,  Loomis,  1. 
evolutus  Cope?,  Loomis,  1. 
polymicrodus   Stewart,    Loomis,    1. 
Osmunda    montanensis    n.    sp.,    Knowl- 
ton,  18. 
Osmundites    skidegatensis    n.    sp.,    Pen- 
hallow,  3. 
skidegatensis  Penh..  Penhallow,  4. 
Osteopygis  Cope,  Wieland,  6. 
gibbi  n.  sp.,  Wieland,  6. 
Ostrea  (Linne)   Lamarck,  Arnold,  2. 
anomioides     var.     nanus     n.     var., 
Johnson  (D.  W.),  5. 
arrosis  n.  sp.,  Aldrich,  5. 
aviculiformis  n.  sp.,  Anderson,  7. 
carolinensis  Conrad,  Glenn,  6. 
compressirostra     Say,     Clark    and 
Martin,  2. 
