FAGALES. 



189 



prominent, numerous and miequally spaced; 

 some of those in the upper part of the leaf 

 enter marginal teeth hi a craspetlodrome man- 

 ner, others send short branches hito the to.cth, 

 but the intennediate ones and those in the 

 lower half of the leaf arc camjitodromc. 

 Tertiaiy system well marked ami (hii)licating 

 the characters found in recent species of M\Tica, 

 namely, that stout, more or less flexuous terti- 

 aries between and sul)j>arallcl with the secondti- 

 ries send out oblique branches and form a 

 coarse and stout Tertiaiy areolation, connected 

 with a finer isodiametric ultimate areolation. 

 The fossil leaves, which have considerable sub- 

 stance preserved as a thui feniiginous sheet of 

 lignite, show munistakable evidence of a punc- 

 tate character, exactly comparable with that 

 which obtams hi recent species of the genus. 



This species, though not abundant, is espe- 

 cially well marked and readily distinguishable 

 from the other meml)ers of the Wilcox flora. 

 It is almost identical with a number of existing 

 species, as for example Myrica ccrifera Linne, 

 which ranges along the Atlantic coast from Cape 

 May, N. J., to Texas and is also fomid on the 

 Beniiuda and Bahama islands and several of 

 the AntUles. Myrica crnfcra is most common 

 and vigorous in sandy swamps along the South 

 Atlantio and Gulf coasts, and its habitat may 

 be legituuately compared with that of Myrica 

 vyilcoxensis. It is also close to the existuig 

 Eurasiatic Myrica gale Lmne. A large number 

 of ft)ssil species arc closely comparable with the 

 present form, esp(>ciaUy those rather numerous 

 species of the upper Eocene and lower Oligoccne 

 of Mediterranean Europe. Among American 

 fossil species it shows considerable resemblance 

 to Myrica. nigricans Lesquereux of the Claiborne 

 gi-oup in the embayment area and may be an 

 ancestor of that form. 



Occurrence. — Grenada formation, Grenada, 

 Grenada County, Miss, (collected by E. N. Lowe 

 and E. W. Berry). 



Collection. — -U. S. National Museum. 



Order FAGALES. 



Family FAGACE^;. 



Genus DRYOPHYLLUM Debey. 



Leaves broad and long pointed witli prominent LU(uiliiio- 

 serrate teeth Dri/ophi/llum ainplum. 



Leaves broad and nhort pointed (elliijliral-ianceolate) 

 with shallow regular serrate teeth. . .DryophyUum moorii. 



Leaves nan'ow and elongated (linear-lanreolate), more or 

 le.-is prominently toothed : 



Petiole .short, secondaiie.s thin and irregularly s])ared. 



DryophyUum anomulum. 

 Petiole long, secondaries stout, more closely and regu- 

 larly spaced : 

 Alternate secondaries camptodrome, teeth irregu- 

 larly spaced Dryophyllun purymrensis. 



Secondaries closer, craspedodrorae, teeth closer 

 and more regularly spaced. 



DryophyUti m Itn ncsseeihiis. 



DRYOp:iYLi.rM AXOMALVM Bcrrv. n. sp. 



riate XXI W tigures ■> and :i. 



DescHption. — Leav(>s of mediinii or large 

 size, elongate, and oblong-lanceolate in out- 

 line, the apex narrowed and extended, acu- 

 minate, and the base narrowly cuneate and 

 decurrent. Length ranges from 15 to 25 cen- 

 tunetei-s. Maximum width, at or below the 

 middle, ranges from 2.5 to 3 centimeters. 

 Margins entire l>elow, somewhat mululate and 

 revolute, variously toothed for the upper tliree- 

 fourths of their length. Teeth remote, irregu- 

 larly spaced, serrate, ranging from forms in 

 wliich they are greatly reduced, like the smaller 

 figured specimen, to forms like the larger 

 figured specimen in wliich they are very promi- 

 nent, directed outward, incurved or recurved 

 and separated by rounded inequilateral sinuses. 

 Leaf substance very tliick and coriaceous.- 

 Petiole short and stout, tumid proximad, about 

 1.25 centimeters in length, the narrowly decur- 

 rent leaf margins reaching nearly to the base. 

 Midrib very stout, prominent on the lower sur- 

 face of the leaf. Secondaries very tliin and 

 immersed in the leaf substance, remote and 

 irregularly spaced, alternate, invariably camp- 

 todrome. They diverge from the mich-ib at 

 wide angles, curve upward in different degrees, 

 are accentuated in the marginal re^gion, ami 

 send a thin tertiary outward to each marginal 

 tooth. Tertiaries mostly obsolete ; where seen 

 they are percurrent. 



This species is distinguishable from all the 

 other Wilcox species of DryophyUum by its 

 thin camptodrome venation. In outline and 

 general appearance it is very similar to the 

 larger forms oi Dniopliyllum puryearensis Berry. 

 The specimens sliow marked textural differ- 

 ences, however, and Dryophyllum puryear- 

 ensis has rather regular stout craspedodrome 

 secondaries. 



