196 



E. W. Berry— A 'Petrified Palm. 



Palm oxy Ion Cliffwooclensis, sp. nov. 



Diagnosis. — Fibro vascular bundles numerous ; small, rounded 

 in transverse outline internally, becoming radially elliptical 

 toward the periphery of the stem, about '5 mm in minimum 

 diameter by l-0 mm in maximum diameter, somewhat variable 

 in size, form and relative position, about the distance of their 

 diameters from one another, as numerous and closely spaced at 

 five centimeters from the periphery as at the outside. No 

 auxiliary (accessory) sclerenchyma bundles present. Stem 

 parenchyma without intercellular spaces ; cells very variable in 

 size and outline, usually elongated and in general radiating 

 from the bundles as viewed in transverse section, maximum 

 diameter about •25 mm , minimum diameter about - 035 mm . The 

 vessels are small and elliptical in cross section and are few in 

 number (3 or 4) ; they are usually seen only in bundles that are 

 dividing preparatory to bending out into the petioles. The 

 pisolitic character of the limonite filling makes sectioning very 

 difficult and usually a part of each fibrovascular bundle is 

 represented by a hole in the section, and even if present the 

 limonite spherules mask the plant structures. Bast fibers 

 rounded in cross section, about '036 mm in diameter, their walls 

 much lignified, making up the bulk of the bundles.... 

 figs. 1-1. 



The Cliff wood species has been compared with the descrip- 

 tions and figures of the following species, an enumeration of 

 which with their occurrences will also serve as a census of the 

 . known species based on the petrified wood heretofore known 

 from the Upper Cretaceous : 



P. anchorus Stevens Monmouth formation, Seabright, 



N.J. 



P. Ligerinum Crie ) 



P. Andegavense Crie >• Turonian or Senonian of France 



P. Guillieri Crie ) 



P. Boxbergae (Geinitz) Stenzel Turonian of France 



P. Zitteli Schenk Campanian of the Libyan Desert 



P. cellulosum Knowlton 1 f-o ■, , ,. ,r TT n *. 



p c , { Kecorded irom the Upper Cretaceous 



P* astren verum Stenzel I I of Tlacolula > Oaxaca, Mexico, but 



J. . cLiSvl \JU V CI LI LJ1 kJLCIJZjCI /"_--- ^\ _T ~l 1j.pi 1 1 11 



P astron radicatum Stenzel I ° f doubtful and Probably younger 

 P. angiorhizon Stenzel J I 



f Found in the Oligocene Phosphorit- 



P. variabile Vater ") lager of Brunswick, Germany, and 



P. parvifasciculosum Vater ! J believed to have been reworked 



P. radiatum Vater f ; from the Emscherian Cretaceous, 



P. scleroticum Vater J but original occurrence not con- 



(^ clusively established. 



P. Cottae liby cum Stenzel Fayum, Egypt (probably Tertiary 



in age). 



