. Maryland geological survey. er distad and also smaller at the base ofthe new shoots. Width 3 mm. to 4 mm. Texture coriaceous. Themidrib is broad and flat occupying about 1/17 of the diameter of the ^ Engelh. and Kink., Abh. Senckenb. Naturf. Gesell., Bd. xxix, Hft. iii, 1908,p. 194, pi. xxiii, figs. 9, 13. 378 Systematic Paleontology leaf. The epidermal cells are arranged in rows; they are small in sizeand thick-walled, quadrangular or slightly hexagonal in outline, rang-ing from proportions but slightly longer than wide to those in whichthe length is about 3 times the width. On the lower su
. Maryland geological survey. er distad and also smaller at the base ofthe new shoots. Width 3 mm. to 4 mm. Texture coriaceous. Themidrib is broad and flat occupying about 1/17 of the diameter of the ^ Engelh. and Kink., Abh. Senckenb. Naturf. Gesell., Bd. xxix, Hft. iii, 1908,p. 194, pi. xxiii, figs. 9, 13. 378 Systematic Paleontology leaf. The epidermal cells are arranged in rows; they are small in sizeand thick-walled, quadrangular or slightly hexagonal in outline, rang-ing from proportions but slightly longer than wide to those in whichthe length is about 3 times the width. On the lower surface of theleaf on either side of the midrib, commencing one-fifth of the distanceto the margin and occupying a width of one-fourth the distance to themargin are the stomatal grooves. They are deeply sunken and appearto have been floored with thin walled cells not well preserved. Thereis some evidence of the occurrence of a woolly scurf in these groovesbut the preservation is such that this cannot be positively asserted. The. Fig. 13.—^View showing the whole midrib and the cuticle of one-half thelamina of Cephalotaxopsis magnifolia, X 110. stomata were comparatively large and irregularly scattered in the floorof the groove. They are without definite arrangement or orientationas the accompanying figure well shows. The guard cells are two in num-ber, long, much curved and slender. This species is exceedingly common in the Patuxent formation ofVirginia to which it appears to be confined in the coastal plain. Althoughit has not yet been reported from the Kootanie formation of the Mon-tana area, it is present in both the Lakota and Puson formations of theBlack Hills Eim and in both the Upper Knoxville and Horsetown bedsof the Shasta of California. At no localities, however, is it as abundant Maryland Geological Survey 379 as in the Icwest Potomac of Virginia. It is strikingly like the modemCephalotaxus in appearance and may also be compared with various fos-sil species of Taxites
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectpaleont, bookyear1901
