Bui. 1074, U. S. Dept. of Agriculture. 



PLATE LIV. 



A 



§ 



B 



tt»«v 



Alaska 'A >. 



Titanic <B). 



I :/<■ glumes from lo« er, central, and upper portion i oi 3plke, natural size; 

 three po Itiona and In transvei e ectlon, magnified 3 diameters. 



