Proceedings Nat. Mns., Vol. IX, 1886.— Boehmei. 



A. — Boat pogitions of Erwahlen, Courland. 



PLATE XVII. 



PositiorLl. 



Q S lO IS 30 35FECT. 



11 II I H 



;v.(^.: 



sMS^ik o'^^MffM^^^ 





Posillan H. 



■n '--' 



CJ 



^ 





<C^ Lvehen. 



'■•::> Coo' 



Position nr. • o C O^ O'" •• - 



•■■■■. ■— <~l^ 



<s::: 



"^c:> 



Widser. 



'^^<K::r:::a^xo<o'^ 



^"^d 



<C3 c:^ 



to 



,-xr\r7r7^cs^ PositianW. 



Oy, c^ 



b - ., - o ^ 



'''VVoQo o o<iO oNogaHen. 



B. — Sectional view. 



C. — Stone chests in Boat-positions III. 



BOAT SHAPED GROUPS IN COVRLAXD, RrS.SIA. 



