BULL. MUS. COMP. ZOOL. 
‘ Kunda Baltishport 
. Wesenberg Hapsal 
Wesenberg 
mm 
limestone 
MS 
Chasmops 
limestone 
a a 
ey 
Reval 
Se 
Reval 
AM 
| Kunda 
Walchow 
Ancistroceras 
limestone 
Chiron 
limestone 
Platyurus 
limestone 
Gigas 
limestone 
}Expansus Is. _| Is. 
Ordovician 
‘yaaoe oy Eze 
Tetragraptus 
zone 
W taupe 
| Packerort 
Lower 
Ceratopyge ls. 
Glauconite ss. 
Obolus 
conglomerate 
| Packerort | 
Roa 
EXPED. TO BALTIC PROVINCES. PLATE 8 
| 
| 
| 
, Ottawa Central 
al 
Frankfort 
Stewartville 
eae | Upper Picton | 
f Prosse 
Prasopora Prasopora 
zone zone 
Hull Glens Falls 
Decorah 
ve | eee Feb 
iil 
HY 
Little Falls 
| Phere | 
ye 
jaime | 
S| I 
cal a hoe ees 
