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Fi(is.l,2. PiTVOXVLON' AMETHYSTixtM 11. sji. Speciuieu Kidge 764 



3,4. PiTYoxvLOx ALiJEHsoNi 11. .sp. Specimen Ridge 763 



5. QUEKCINIIM LAiiAUEXSF. II. sp. Specimen Ridye 771 



6,7. RiiAMNACiN'H'M UAiiiA'i'UM Felix. Specimen Rifliie 769 



1. l\'adi:il section x 90 iliami-ters. Sliows wood cells with single row of pits, and 



spring and fall wood; also mednllary rays. 



2. Tangential section x 91) diameters. Shows the long wood cells and short mednllary 



rays. 



3. Radial section X 90 diameters. Shows wood cells with a single row of pits. 



4. Transverse section through annual ring, x 90 diameters. 



r>. Transverse section X 320 diameters. Shows the fall and spring wood. 



6. Transverse section X 90 diameters. Shows mednllary rays of short lells, thin- walled 



wood cells, and scries of ducts. 



7. Tangential section X 90 diameters. Shows wood cells, iiieilnllary rays, and dotted 



ducts. 



876 



