AHT.23 THE ESMEEALDA FOKMATION" BEERY 15 



of sedimentation from higher levels, since it is both tiny and cori- 

 aceous. The genus has not before been found in the later Tertiary 

 of western North America, although it occurs in the Pleistocene of 

 that region, as well as in the existing flora of the Pacific slope from 

 Alaska southward. The modern species are shrubs or small trees, 

 about 125 in number, and holarctic in their distribution, occurring 

 also in the Southern Hemisphere, and from their present distribu- 

 tion obviously of ancient lineage, although their geological history is 

 very imperfectly known. The present species is not 'unlike some of 

 the leaves of the wide-ranging existing VacciniuTn uliginosum 

 Linnaeus and Vaccinium vitis-idaea Linnaeus. 



Occuirence. — Coal prospect 4 miles southeast of Morgan Eanch 

 and 15 miles west of Hawthorne, Mineral County, Nev. 



Holotype.— Cat No. 37308, U.S.N.M. 



VACCINIUM VACCINIFOLIA (Knowlton) Berry 



Salix vaccmifoUa Knowlton, U. S. Geol. Surv. 21st Ann. Rept, pt. 2, 

 p. 212, pi. 30, figs. 8, 20, 1901. 



These small, entire, subcoriaceous leaves are not those of a willow, 

 and I have therefore transferred them to the genus Vaccinium, which 

 they resemble in size, texture, margins, and venation. 



EXPLANATION OF PLATES 

 Plate 1 



Fig. 1. Castalia (?) sp. seed, X2. 



2-4. Ceratophyllum fossilium Berry, natural size. 

 5-8. Potamogeton Jcnowltoni Berry. 



Figs. 5, 6. Leaves, natural size. 

 7,8. Fruits X5. 

 9, 10. Amolla tertiaria Berry. 



Fig. 9. Plant natural size. 

 10. Same X6. 

 11, 12. Leaves referred to Ceratophyllum. 



Fig. 11, X2; Fig. 12, X3. 

 13-15. Rhizomes referred to Typha. 



Figs. 13, 14, natural size; Fig. 15, X2. 



Plate 2 

 Fig. 1. Saliip Jcnowltoni Berry, 



2, Sapindus lancifoUus Lesquereux. 



3, Quercus simulata truncata Berry, 



4, Vaccinium ellipticum Berry, X2, 

 5,6, Trapa americana Knowlton, X2. 



7. An alga, FontinaUs or submerged foliage, X2. 



o 



