CXX1V THE PALEONTOLOGY OF MINNESOTA. 
Table showing number of species found in each of the beds, groups and periods of the 
Lower Silurian in Minnesota, number of same received from below and passing up, 
and number restricted to each. 
S Hudson River 
Trenton period. or Cincin- 
nati period. 
Stones River group. | Black River group. Trenton group. 
Utica eee 
| Vanux|Sticto-] Rhini-|C - Mi is-| Mac- |g eee 
Some emia |porella} dictya toe Lae pa ee pace pega group. 
"| bed. | bed. bed. bed. bed. | bed. | bed. | bed. 
| Number of species........... 2 | 5 5 8 3 7 6 6 2 
=| Received from below and pass-| | 
Pec Paingwp ie o cio eee OUR SUNSETS) ZI LPeS3y] SS a8 | eB) Sh] 2 IL. @ 
& | Number of species restricted 
eS ol iia) Ieee; ja GunocousbosoouDe 5 0 2 0 1 0 2 2 3 0 
s els 1 
=| 
‘= %| Number of species............ 8 u 9 2 6 
© B| Received from below and pass- 
S| Sing paneer en aetna eee 214 4|1 1|0 010} 0 |0 
&t] Number of species restricted 
Si) tO STOUPS:4 ses aastieeee ose - 4 6 8 2 6 
a| Number of species............ 7 7 39 57 8 48 36 43 0 
| Received from below and pass- 
Pilbingid peer Acer eee bese 2/4] 4/4 | 4] 19/17 | 18] 8] 5 |14 | 18/12 | 15/19] 1 | oO] 0 
.. o}| Number of species restricted 
S95] to beds:...2..-2.........-.. 3 1 16 27 0 21 10 24 0 
S = 
6 “1 Number of species.......-.-- 45 91 65 1 11 
=| Received from below and pass- 
SO RING pkaeersneee «teats cies says 2; 21 21 | 19 20]1 0|0;1/0 
&] Number of species restricted 
{El HO)PKOUPSwcan <r cmecuscceaer 24 56 45 1 10 
«| Number of species............ 14 16 13 16 7 18 | 23 30 0 
| Received from below and pass- 
ed | Sain gap he ae Nee. Hae 2111/10 | 11/11 | 9 [10] 10) 7] 5 | 9| 1010 | 10/12} 8 | O| 0 
S | Number of species restricted 
So “1 to beds....-.......:...-.... 3 1 1 2 0 5 8 14 0 
is) ‘ 
= 
= g| Number of species............ 22 28 43 15 25 
(4 =| Received from below and pass- 
Ol Pin giupeee. shen ee emcee 2] 12 11 | 12 1317 4/6 }10|0 
&] Number of species restricted 
f=!) Nowra Ci she .sSeenaqcar caddec 10 11 24 7 15 
See Niumberjof Species’ emer. 1c 14 22 3 13 43 4 13 36 4 
& | Received from below and pass- 
fea Ge TG UD wit sek ios Meroe ds ee ?]7/417/3]1] 2] 1318/2] 0/0]2|4)/4]3] 3/0 
 g|Number of species restricted 
Spal Wesinoh ost Cisce po oom acts nmaAan 7 11 0 0 23 4 7 29 1 
ES EE TEE _—eeeeeee 
= 
= 2 Number of species .......... 32 47 46 6 15 
3 =| Received from below and pass- 
Mets Pete) bl daaemnarennosadeceaacn ellen 7\2 2/0 oj;1!11/0 
+ &! Number of species restricted 
fel ly Woon loch of as gadat on adocs 25 38 44 5 14 
a4| Number of species............ 2 67 6 17 42 8 29 59 13 
| Received from below and pass- 
Ro |Piny Ups eek tees tee ?|2| 2] 22} 6111 4] 13/23/10) 1| 219] 17/24]8| 710 
s g| Number of species restricted 
125-21 Tih aalseateeneomaceoododone 0 | 445 0 1 6 Ste |e ea 
S oe eee eee ee ee ee eE—————————— 
4 4%| Number of species............ 67 50 78 7 13 
& s| Received from below and pass- 
iS) Cinta Awe ch onae cdaocptonone ?|18 12 | 12 16 | 2 1|315|0 
&] Number of species restricted 
Pel eG Os LOU PSers si yaecieeleier aie eters 49 29 61 4 8 
