682 
INDEX    TO    NORTH    AMERICAN    GEOLOGY 
Paleontology — Continue  d. 
Genera  and  species  described — Continued. 
Mesohippus    westoni,     Cope,     Matthew 
(W.  D.),  9. 
westoni   (Cope),  Lambe,  14. 
westoni  Cope,  Lambe,  16. 
Mesonychidae,  Matthew  (W.  D.),  19. 
Mesonyx  obtusidens  Cope,  Wortman,  9. 
Mesostoma?  intermedium  n.  sp.,  Whit- 
eaves,  12. 
?  newcombii  n.  sp.,  Whiteaves,  12. 
suciense  n.  sp.,  Whiteaves,  12. 
Mesotrypa  angularis  n.  sp.,  Ulrieh  and 
Bassler,  2. 
echinata  n.  sp.,  Ulrieh  and  Bassler, 
2 
Metablastus   bipyramidalis   Hall,    Row- 
ley, 4. 
bipyramidalis       V      Hall,      Rowley, 
Gi-eene,  5. 
bipyramidalis         Hall,         Rowley, 
Greene,   11. 
lineatus  Shumard,  Rowley,  4. 
nitidnlus     M.      and     G.,      Rowley, 
Greene,   1. 
Metaeheiromys  marshi  n.  gen.  and  sp., 
Wortman,  13. 
Metamynodon?,' Douglass,  8. 
Metaplasia  plicata  n.  sp.,  Weller,  6. 
pyxidata  (Hall),  Weller,  6. 
Metasigaloceras  n.  gen.,  Hyatt,  1. 
Metaeheiromys  Wortman,  Osborn,  30. 
dasypus  n.  sp.,  Osborn,  30. 
tatnsia  n.  sp.,  Osborn,  30. 
Metatirolites    Mojsisovies,     Hyatt    and 
Smith.  1. 
Metatissotia  n.  gen.,  Hyatt,  1. 
Metengonoeeras  n.  gen.,  Hyatt,  1. 
acutum  n.  sp.,  Hyatt,  1. 
ambiguum  n.  sp.,  Hyatt,  1. 
dumbli  (Cragin),  Hyatt,  1. 
inscriptum  n.  sp..  Hyatt,  1. 
inscriptum  var.  ?,  Hyatt,  1. 
Metis  H.  and  A.,  Adams,  Arnold,  2. 
alta  Conrad,  Arnold,  2. 
biplicata  Conrad,   Glenn,  6. 
Metoieoceras  n.  gen.,  Hyatt,  1. 
acceleratum  n.  sp.,  Hyatt,  1. 
gibbosum  n.  sp.,  Hyatt,  1. 
swallovi    (Shumard),  Hyatt,  1. 
whitei  n.  sp.,  Hyatt,  1. 
Metopocetus  Cope,  Case,  9. 
durinasus  Cope,  Case,  9. 
Metopoma   explanata  n.   sp.,   Sardeson, 
9. 
Metoposaurus  fraasi   n.  sp.,  Lucas    (F. 
A.),  19. 
fraasi  Lucas,  Branson,  2. 
Metoptoma   amii   n.   sp.,    Matthew    (G 
F.),  19. 
Metula  fastidiosa  n.  sp.,  Casey,  4. 
fragilis  n.  sp.,  Casey,  4. 
marylandica  n.  sp.,  Clark  and  Mar- 
tin, 2. 
Myeria?  harveyi  Woodward,  Whiteaves, 
12. 
Paleontology— Continued. 
Genera  and  species  described — Continued. 
Michelinia  convexa  D'Orbigny,  Beecher, 
1. 
eugeneae  White,  Beede,  1. 
eugenese    var.    princetonensis,    Ul- 
rieh, 8. 
subramosa  n.  sp.,  Ulrieh,  8. 
wardi  n.  sp.,  Greene,  8. 
Microdiscus?  sp.  undet.  Weller,  6. 
Microdon    leptogaster    (Win.),    Weller, 
o. 
Microdrillia  n.  gen.,  Casey,  4. 
aldrichiella  n.  sp.,  Casey,  4. 
biplicatula  n.  sp.,  Casey,  4. 
(Pleurotoma)      cossmani,      Meyer, 
Casey,  4. 
elongatula  n.  sp.,  Casey,  4. 
(Glyphostoma)  harrisi  Aid,,  Casey, 
4. 
(Pleurotoma)  infans  Meyer,  Casey, 
4. 
(Pleurotoma)    lerchi   Vgn.,    Casey, 
4. 
minutissima  n.  sp.,  Casey,  4. 
robustula  n.  sp.,  Casey,  4. 
rostratula  n.  sp.,  Casey,  4. 
solidula  n.  sp.,  Casey,  4. 
vicksburgella  n.  sp.,  Casey,  4. 
Microcyclus  Meek  and  Worthen,  Lambe, 
2. 
discus  Meek  and  Worthen,  Lambe, 
2. 
Micromeris  Conrad,  Dall,  8. 
Microporella    ?  bifoliata  n.   sp.,  Ulrieh 
and  Bassler,  4. 
inflata  n.  sp.,  Ulrieh  and  Bassler,  4. 
prseciliata  n.  sp.,  Ulrieh  and  Bass- 
ler, 4. 
Micropternodus  borealis  n.  gen.  and  sp,, 
Matthew  (W.  D.),  9. 
Microstagon  Cossmann,  Dall,  8. 
Microsurcula  n.  gen.,  Casey,  5. 
bellula  n.  sp.,  Casey,  5. 
nucleola  n.  sp.,  Casey,  5. 
Microsyops  Leidy,  Wortman,  13. 
annectens  Marsh,  Wortman,  13. 
(Bathrodon)  annectens  Marsh,  Os- 
born, 11. 
elegans  Marsh,  Wortman,  13. 
gracilis,  Osborn,  11. 
gracilis  Leidy,  Wortman,  13. 
schlosseri  n.  sp.,  Wortman,  13. 
scottianus  Cope,  Osborn,  11. 
(Mesacodon)   speciosus  Marsh,  Os- 
born, 11. 
(Bathrodon)  typus  Marsh,  Osborn, 
11. 
uintensis  Osborn,  Osborn,  11. 
Microzamia  ?  dubia  n.  sp.,  Berry,  6. 
Milleroceras   parrishi   Miller   and   Gur- 
ley,  Smith  (J.  P.),  3. 
Milneria  Dall,  Dall,  8. 
Miltha  H.  and  A.  Adams,  Dall,  8. 
Mimulus  waldronensis  Miller  and  Dyer 
1878,  Beecher,  1. 
