274 bulletin: museum of comparative zoology. 



River Lawa at Wassilkowa. (Measured by the writer). 



9. Thin, irregularly bedded, gray limestone and shale. 



20 ft. = 72 ft. 



8. Bright red and green variegated limestone in thin beds. 



Bi,5. (Biiia (partim) of Lamansky). 4 ft. = 52 ft. 



7. Thick-bedded light, blue-gray limestone. (B,i^). lift. = 48 ft. 



6. Thin-bedded, irregular, blue limestone with thick shaly 

 partings. (B„^). 13 ft. = 37 ft. 



5. Heavy -bedded red and green limestone with few fossils. 



(B„J. G ft. = 24 ft. 



4. Green sand and clay. (Glauconite sand). 6 ft. = 18 ft. 



Zones 4 to 8 and the lower part of 9 make up the 

 Walchow formation. The " Linsenschicht" is present in 

 9, but unfortunately I did not note its exact position. 



3. Black shale. (Dictyonema shale). 1 ft. = 12 ft. 



2. White, gray, and yellow sand, very irregularly bedded. 

 It crumbles readily at the touch and contains numerous 

 specimens of Obolus apollinis along the planes of cross- 

 bedding. Zones 2 and 3 represent the Packerort forma- 

 tion. 10 ft. = 11 ft. 



1. Very hard red sandstone, base not seen. 1 ft. = 1 ft. 



Papowka, south of Petrograd. (Measured by the wTiter). 



9. Thick-bedded, gray, fine-grained limestone with numer- 

 ous Orthoceratites. It contains two red layers, each one 



foot in thickness. 18 ft. = 57 ft. 



8. Red limestone full of Orthoceratites. 1 ft. — 39 ft. 



7. Heavy-bedded dolomitic limestone which contains cavi- 

 ties from which fossils have been dissolved. Ortho- 

 ceratites in top foot. 7 ft. = 38 ft. 



6. Shaly hmestone with "linsen." 5 in. = 31 ft. 

 Zones 6-9 represent the Kunda formation. 



5. Thin-bedded limestone with much clay and shale. 



12 ft. = 30 ft. 6 in. 



4. Thick-bedded green and red limestone. 7 ft. = 18 ft. 6 in. 



3. Green sandy shale. 1 ft. = 11 ft. 6 in. 

 Zones 3-5 represent the Walchow formation. 



2. Black shale with only microscopic fossils. 4 ft. 6 in. = 10 ft. 6 in. 



