HOLDEN—RAY TRACHEIDS 
EXPLANATION OF PLATES I AND II 
. I1.— Sequoia gigantea; X 250. 
. 2,—Same; 
00. 
4Sauele biesicac leas age: X 200. 
4.—Same; 
5.—Sciadopitys; aco, 
. 6.—Sam 600. 
- 7.—Chamaecy paris osiaindiale: X 700. 
- 8.—Cupressus guadalupensis; 600 
11.—Tetraclinus articulata; 600. 
. 12.—Thuja occidentalis; X 200. 
. 13.—Same; X 700. 
. 14.—Juniperus californica; X 600. 
. 15.—Libocedrus decurrens; X 200. 
. 16.—Same; X7oo. 
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