76 FLORA OF SOUTHERN NEW YORK AND NEW ENGLAND. 



Persea Leconteana (Lesquereux) Lesquereux. 



PI. XXXI, fig. 1. 



Persea Leconteana (Lesq.) Lesq., Cret. FL, 1874, p. 75, pi. 28, fig. 1. 



Sassafras Leconteanum Lesq., Trans. Am. Philos. Soc, vol. 13, 1869, p. 431, pi. 23, fig. 1. 



Although this is the only specimen of the species thus far reported from the 

 Cretaceous of eastern North America, its identity seems to be quite satisfactory. 

 The change in the generic name from Sassafras to Persea, by Lesquereux, is certainly 

 to be commended. 



Locality: Gay Head, Marthas Vineyard. Collected by David White. Specimen 



in U. S. Nat. Mus. 



Persea valida n. sp. 



PI. XXIX, figs. 8, 9. 



Leaves about 1 decimeter long by 3 centimeters wide in the middle, linear-lanceolate in outline, tapering 

 to a wedge-shaped base and rather abruptly to an acute apex; margins entire and irregularly wavy; midrib 

 curved and flexuous above, straight or nearly so below; secondary nerves numerous, irregularly disposed and 

 forming varying, mostly acute angles, with the midrib, especially below, curving upward and anastomosing 

 near the margin. 



These beautiful and well-defined leaves are hardly distinguishable from many of 

 the leaf forms of the living Persea pubescens (Pursh) Sarg. ; and if found in one of the 

 more recent geological horizons would probably be regarded as identical with that 



species. 



Locality: Glen Cove, Long Island. Collected by David White. Specimens in 



U. S. Nat. Mus. 



OCOTEA NASSAUENSIS n. Sp. 



PI. XXVII, fig. 8. 



Leaf about 5.5 centimeters long, entire, obovate, constricted above to a narrow apex; nervation campto- 

 drome; secondary nerves alternately disposed, about four on each side, diverging from the midrib at varying 

 acute angles and curving upward along the margin. 



This leaf is apparently different from any heretofore described, although it has 

 some resemblance to the figure described as a terminal leaflet of Sapindus diversi- 

 folius Lesq. a The specific name is from Nassau, an old name for Long Island. 



Locality: Glen Cove, Long Island. Collected by David White. Specimen in 



U. S. Nat. Mus. 



Nectandra imperfecta n. sp. 



PI. XXVII, figs. 13, 14. 



Leaves linear-ovate to linear-lanceolate in outline, entire, narrowed below to a wedge-shaped base; sec- 

 ondary nerves few, irregularly disposed, the lower ones extending upward at acute angles, the upper ones 

 diverging from the midrib at more obtuse angles and connecting with the former through the short tertiary 

 cross nervation in the upper part of the leaf. 



It is unfortunate that these specimens are both imperfect, as they apparently 

 represent a new and well-defined species in the Lauracese ; but without the apex it 

 is not possible to form a satisfactory idea of exactly what the leaves were like, 



aMon. U. S. Geol. Survey, vol. 17 (Fl. Dak. Gr.), 1892, p. 158, pi. 64, fig. 18 in part. 



