674 
INDEX    TO    NORTH    AMERICAN    GEOLOGY 
Paleontology— Continued. 
Genera  and  species  described — Continued. 
Leda   minuta   Pabr.    var.    precursor   n. 
var.,  Arnold,  2. 
?  navicula  n.  sp.,  Cragin,  2. 
parilis    (Conrad),   Clark  and  Mar 
tin,  2. 
var.,  Clark  and  Martin,  2. 
parva  (Rogers),  Clark  and  Martin, 
2. 
potomacensis    n.     sp.,     Clark    and 
Martin,  2. 
rostellata    Conrad,    mut.    pygmaea 
nov.,  Loomis,  4. 
saccata  (Win.),  Weller,  2. 
taphria  Dall,  Arnold,  2. 
tysoni  n.  sp.,  Clark  and  Martin,  2. 
sp.,  Dall,  10. 
Leiomya  A.  Adams,  Dall,  8. 
Leioclema?  sp.,  Girty,  3. 
Leiorhynchus      huronensis      Nicholson, 
Shimer  and  Grabau,  1. 
laura  Billings,  Shinier  and  Grabau, 
1. 
limitare   (Vanuxem),  Kindle,  1. 
niulticostus  Hall,  Shimer  and  Gra- 
bau, 1. 
quadricostatum     (Vanuxem),    Kin- 
dle, 1. 
Leperditella  ornata  n.  sp.,  Weller,  6. 
Leperditia  Rouault,  Grabau,  1. 
alta  (Con.),  Weller,  6. 
altoides  n.  sp.,  Weller,  G. 
balthica    Hisinger    var.    guelphica 
Jones,  Clarke  and  Ruedemann,  1. 
elongata  n.  sp.,  Weller,  6. 
fabulites   Conrad   sp.,    Ruedemann, 
fabulites  (Con.),  Weller,  C>. 
gigantea  n.  sp.,  Weller,  6. 
limatula  n.  sp.,  Raymond   (P.  E.), 
7. 
resplendens  n.  sp.,  Ruedemann,  2. 
?  rugosa,  Matthew  (G.  F.),  20. 
??  rugosa  n.  sp.,  Matthew  (G.  F.), 
13. 
scalaris  Jones,  Grabau,  1. 
sp.,  Girty,  3. 
Lepidechinus  Hall,  Klem,  1. 
imbricatus  Hall,  Klem,  1. 
rarispinus  Hall,  Klem,  1. 
Lepidesthes  Meek  and  Worthen,  Klem, 
1. 
colletti  White,  Klem,  1. 
coreyi  Meek  and  Worthen,  Klem,  1. 
formosus  Miller,  Klem,  1. 
spectabilis     Worthen    and     Miller, 
Klem,  1. 
wortheni  Jackson,  Klem,  1." 
Lepidocardia  Dall,  Dall,  8. 
Lepidocidaris  Meek  and  Worthen,  Klem, 
1. 
squamosus     Meek     and     Worthen, 
Klem,  1. 
Lepidocoleus  jamesi  Hall  and  Whitfield 
sp.,  Ruedemann,  2. 
Paleontology— Continued. 
Genera  and  species  described — Continued. 
Lepidocystis    inquisitus    D.    W.,    White 
(D.),  18. 
siliqua    (Dn.)    D.   W.,   White    (D.), 
18. 
Lepidodendron    keyesi    n.    sp.,    Herrick 
(C.  L.),  3. 
socorroense  n.  sp.,  Herrick  (C.  L.), 
3. 
thwaitesi  n.  sp.,  Herrick  (C.  L.),  3. 
thwaitesi    var.    striolatum    n.    var., 
Herrick  (C.  L.),  3. 
sp.?,  Herrick  (C.  L.),  3. 
Lepidodiscus  alleganius  n.   sp.,   Clarke, 
3. 
Lepidostrobus,  Smith,  1. 
?  globosus  Dn.,  White  (D.),  18. 
Lepidotus  haydeni  Leidy,   Stanton  and 
Hatcher,  1. 
Lepidotus  occidentalis  Leidy,  Lambe,  3. 
occidentalis     Leidy,     Stanton    and 
Hatcher,  1. 
Lepocrinites  Conrad,  Scbuchert,  11. 
gebbardii  Conrad,  Scbuchert,  11. 
manlius  n.  sp.,  Schuchert,  11. 
Lepralia  labiosa  n.  sp.,  Ulrich,  2. 
maculata   n.   sp.,  Ulrich  and  Bass- 
ler,  4. 
marylandica     n.     sp.,     Ulrich     and 
Bassler,  4. 
montifera  n.  sp.,  Ulrich  and  Bass- 
ler, 4. 
?  reversa  n.  sp.,  Ulrich  and  Bass- 
ler, 4. 
subplana  n.  sp.,  Ulrich,  2. 
Leptama  Dalman,  Grabau,  1. 
minnesotensis  n.  sp.,  Sardeson,  9. 
pra*cosis  n.  sp.,  Sardeson,  9. 
recedens  n.  sp.,  Sardeson,  9. 
rhomboidalis     (Wahlenberg) ,    Gra- 
bau, 1. 
saxea  n.  sp.,  Sardeson,  9. 
rhomboidalis        Wilckens,        1769, 
Beecher,  1. 
rhomboidalis     (Wilckens),    Kindle, 
1. 
rhomboidalis       Wilckens,       Ruede- 
mann,-2. 
rhomboidalis   (Wilck.),  Weller,  2. 
rhomboidalis  Wilckens,  Kindle  and 
Breger,  1. 
rhomboidalis  Wilck.,  Weller,  6. 
rhomboidalis  (Wilck.),  var.  ventri- 
cosa  (Hall),  Weller,  6. 
Leptaxinus  Verrill  and  Bush,   Dall,   8. 
Leptesthes  Meek,  Dall,  8. 
Leptictida?,  Matthew  (W.  D.),  19. 
Leptichthys,  Stewart,  1. 
agilis  n.  sp.,  Stewart,  1. 
Leptobolus  Hall,  Matthew   (G.  F.),  20. 
atavus  n.  sp.,  Matthew   (G.  F.),  2, 
20. 
atavus  mut.   insulse  n.   mut.,   Mat- 
thew (G.  F.),  20. 
atavus  mut.  tritavus  n.  mut.,  Mat- 
thew (G.  F.),  20. 
