399 



30. DEY0PHYLLU3I (QUERCUS) SALICIFOLIU^I, S}). nOV. 



Leaf liuear-lauceolate, rounded and narrowed to the base (broken), 

 slightly curved to one side; borders acntel}" denticulate, with small 

 teeth turned outward in the lower part and upward in the upper part of 

 the leaf; substance rather membranaceous than coreaceous ; lateral veins 

 close, twelve pairs in a space less than five centimeters, slightly curv- 

 ing in passing up to the borders in an angle of divergence of forty de- 

 grees, either entering the teeth by their end, and branching under the 

 teeth, the divisions following theborders, or curving in festoons along the 

 borders, especially in the upper part of the leaf, and sending up a short 

 branch into each tooth. 



The ramification is that of this genus ; the areolation is not distinct ; in 

 the upper part only the nervilles, in right angle to the veins, appear 

 ramified in the same way, ending in square or polygonal areoliTe. 



Of the species of Dryoijliyllum published as yet, the only one compar- 

 able to this, and indeed closely allied, at least by its smallest leaves, is 

 D. suicretaceum, Sap., of the Lower Eocene flora of Sezane. 



31. Ilex strangulata, sp. nov. 



Leaf thick, coriaceous, with a rugose surface, narrow, panduriform, 

 or strangled in the middle to a large tooth or small acute lobe, attenu- 

 ated, entire, and rounded to the petiole ; upper part enlarged, oval- 

 pointed, with borders irregularly and distantly denticulate ; secondary 

 veins open, nearly at a right angle, but irregular in direction, angle of 

 divergence, and distribution ; curving close and along theborders, which 

 they follow in double festoons, entering the teeth by branchlets ; areo- 

 lation small, square or polygonal. 



The thick texture of this leaf is marked by its rugose surface obliter- 

 ating the areolation, except in some places where the epidermis is 

 destroyed. By its peculiar form this leaf is without distinct affinity with 

 any species known to me ; but the mode of irregular division, the thick 

 texture, and the nervation in all its details refer it to the genus Ilex. 

 Even oui; common Holly [Ilex opaca) has often deformed leaves, which 

 present peculiar deviations of the original type. 



These two species, without any positive relation of character with 

 any described species of the Cretaceous or of the Tertiary, seem rather 

 referable to Cretaceous age by a kind of general affinity with the leaves 

 of the upper stage of the Cretaceous of New Jersey. Indeed, the two 

 groups which have till now been explored in this State for fossil leaves 

 present, by the lithology and the station, a striking likeness with what 

 is seen in the stratification, the composition and the plants of the forma- 

 tions referred above and reported by Mr. Holmes. The lower group of New 

 Jersey has coarse, sandy, white, or reddish shale as compounds of the 

 beds, wherein the plants are embedded in profusion. These represent, 

 always in fragmentary specimens, species either analogous or identical 

 to those of the Dakota group. Magnolia alternans especially is in the 

 collection of the Geological Survey of New Jersey upon a large number 

 of specimens.* The upper group, on the contrary, has but a single 

 species identical with those of the lower group, though the intervening 

 space is not more than one hundred feet. All the types of this upper group 

 are without analogy with those of the lower, and the specimens also are 

 of a soft clay, where the characters of the leaves are far better preserved. 



* By the kindness of Dr. George H. Cook, the director of the Geological Survey of New 

 Jersey, I had the privilege of a full and comparative examination of the numerous 

 specimens of this collection. 



