178 



SHORTER CONTRIBUnONS TO GENERAL GEOLOGY, 1!>21. 



Lea res small, thick, and entire, \vi(!i stout 

 petioles and inidrihs and <)l)scure secondary 

 venation whicii is inunersed in tlie thick lam- 

 ina. Length 2.5 to .5 centimeters; width 0.9 

 to 1.3 centimeters. Venation, where visible, 

 showing numerous parallel, camptodrome, 

 relatively long and thin secondaries, which 

 branch from the midrib at acute angles. 

 Though the majority of these leaves are equally 

 acuminate at both ends, there is considerable 

 variation in this respect, and a well-marked 

 tenilency is siu>^^^l in many specimens tliat are 

 relatively broader, especially in the u|)pcr lialf, 

 toward an obtusely rounded apex, the terniina- 

 tion of the midril) showing as a small nuK ronate 

 point. The base in these forms grachiaiiy nar- 

 rows to the stout petiole. The variations in 

 outline of this species are well shown in the 

 figures reproduced in Newberry's monograph. 



Typical leaves of this s])ecies are not un- 

 common at Arthurs Bluff. Tex. It was de- 

 scribed originally from specimens found in the 

 upper part of the Raritan formation of New 

 Jersey and has subse(|uently b(>en recognized 

 in the Magothy, Black Creek, and Tuscaloosa 

 formations of the southeastern Atlantic Coastal 

 Plain and in th(^ Bingen sand of Arkansas. 

 Somewhat similar obovate leaves of very 

 coriaceous texture, formerly confused with 

 this species, are soraewliat younger and have 

 recently been transferred by me to the genus 

 Etipltorhioiihi/lhim. 



It may well be questioned whether this and 

 the following species of Andromeda should be 

 referred to the Ericales. Certainly the |)resent 

 form has numerous points of contact with the 

 leaves of Eiujenin, which has been positively 

 recognized in the lower Eocene (loras of this 

 general region. 



Andromeda snowii Lesquereux. 



An/lronwla snovni TiCsquereux, U. S. (ipol. Survoy ^ton. 

 17, p. 117, pi. 17, (ic. 1'!, 18!H (IWI'-'l- 

 Herry, Torrcy Hot. t'lub Hull., vol. :VI, ]>. inr>, 1!)12. 



Leaves small, entire, coriaceous, lanceolate, 

 broadest in the middle and ec|ually acute at 

 both ends. Length 4. .5 centimeters; maximum 

 width 1.0 centimetci-s. Midrib stout. Second- 

 aries obli(|ue, regularly spaced, suhparallcl, 

 camptodrome. 



This species, <if doubtful distinctness from 

 the preceding, was descrit)r'd ongiiudly from 

 material collected in the Dakota sandstone of 



Ellsworth County, Ivans. It is represented 

 by a single specimen from .Vrthui-s Bluff, Tex. 

 It resembles the lanceolate leaves of the pre- 

 ceding species but is broader, with less numer- 

 ous and much less ascending secondaries. 



Order EBENALES. 



Family EBENACEAE. 



Genus DIOSPYROS Linnfi. 



Diospyros primaeva Heer. 



Plato XXXIX, (ifjure2. 



Diospyros priiruicia Heer, Phyllitt's cr^taci^es du Ne- 

 braska, p. 19. pi. 1, figs. fi. 7, 18H0; Flora fossilifl 

 arctica. vol. fi, Abt. 2. p. 80, pi. 18. fig. 11. 1882; 

 vol. 7. p. 31. pi. 51, figs. 5a, b. c. 1883. 



Englchardt, Natur\vis8. Gosell. Isis in Drpsden Abh. 

 7, Jahrir. ISOl. p. 98. 1892. 



I.o8(iu<'roux. The flora of the Dakota group, p. 109, 

 pi. 20. figs. 1-3. 1.892. 



Smith. On the geology of the Coastal Plain of Alabama, 

 p. :U.H. 1894. 



Newberry, The flora of the Amboy clays, p. 124. pi. 

 .30, figs. 1-5, 189G. 



Knowlton, U. S. Geol. Survey Twenty-first Ann. 

 Kept., pt. 7, p. 317, pi. 39, fig. 3, 1901. 



Berry, Torrey Hot. Club Bull., vol. 32, pi. 2. 1905; 

 vol. 34, p. 204, 1907; vol. 38, p. 417, 1911; New 

 Jersey Geol. Survey Bull. 3, p. 211, pi. 29. fig. 1, 

 1911. 



Hollick. The Cretaceous flora of southern New York 

 and New England, p. 103. pi. 42. figs, 2. 11. 190fi. 



Berry. Maryland Geol. Survey. Upper Cretaceous, 

 p. 894, pi! 90, fig. 4. 19U); U. S. Geol. Survey Prof. 

 Paper 84, p. fil, pi. 11. fig. 3; pi. 14, figs. 12. 13, 

 1914: Torrey Hot. Club Bull., vol. 43, p. :103. 1916; 

 U. S. Geol. Survey Prof. Paper 112, p. 134. pi. 30, 

 fig. .3. 1919. 



Leaves oblong-ovate, variable according to 

 age, ninging from 3 to IT) centimeters in length 

 by 1.3 to 5 cenlinieters in greatest width, wiiich 

 is in the middle part of the leaf. Ajiex acute 

 or obtu.se. Base cuneate. Margins entire. 

 Petiole rather long and very stout. Midrib 

 also stout. Secondaries iiranching from tho 

 nxidrib, generally at acute angles, subopposite 

 to alternate, parallel, canijitodrouie. Terti- 

 aries forming polygonal areoles, whose rela- 

 tive prominence is one of the features of tliis 

 species. 



This species, which is suggestive of the 

 modern niospifrns vircjiniana Linn*"', was de- 

 scrihid by lleer from specimens collected in 

 the Dakota sandstone of Xehraska over half 

 a century ago. It has jirovcd to he a funu of 

 very wide range, having been identified at liolh 

 the Atane and I'litiMit liori/.ons in (ireenlaiid. 



