798 SYSTEMATIC PALEOXTOLOGY 



from the Jurassic of the east coast of Greenland under the name of Pliyllo- 

 cladoxylon. The present species has not heretofore been recorded in the 

 Coastal Plain south of the Xew Jersey area, although it is apparently 

 represented by fragmentary material in the Magothy formation of Mary- 

 land and the Tuscaloosa formation of Alabama. 



Occurrence. MAGOTHY FORMATIOX. Grove Point, Cecil County. 



Collection. Maryland Geological Survey. 



PROTOPHYLLOCLADUS LOBATUS Berry 



Thinnfeldia sp. nov. Berry, 1907, Johns Hopkins Univ. Circ., n. s., No. 7, 



p. 81. 

 Protophyllocladus lobatus Berry, 1911, Bull. Torrey Bot. Club, vol. xxxviii, 



p. 403. 

 Protophyllocladus lobatus Berry, 1914, Prof. Paper U. S. Geol. Survey, No. 



84, p. 17, pi. ii, figs. 9-13. 



Description. Leaves (phylloclads) of large size, lanceolate or oval in 

 general outline, either entire with crenate margins, rounded apex and 

 narrowly cuneate base or compound through the development of opposite 

 lateral lobes. Axial vascular strand very stout below, becoming very 

 thin and finally disappearing apically. When lobate, subordinate opposite 

 vascular strands form the axis of the lobes, and these are usually but not 

 always lost before reaching the tips of the lobes by giving off innumerable 

 secondary branches. Margins in all cases are rather remotely undulate- 

 crenate and the tips are all rounded. Secondaries numerous* and thin, 

 diverging from the main axis of the phylloclad on the axis of the lobes at 

 very acute angles, curving outward, either simple, more often dichoto- 

 mously forked, and occasionally several times forked. Lobes when present 

 separated by cuneate narrowly rounded sinuses which terminate some dis- 

 tance from the main axis. The largest specimen, which is still incomplete 

 at both the apex and the base, measures 8 cm. in length and 5 cm. from tip 

 to tip of the l@wer lobes, the upper entire portion measuring about 1.5 cm. 

 in width. 



These remains are superficially like fern fronds, especially in specimens 

 that are compound, and were it not for the presence in the Cretaceous of 

 other Phyttocladus-l\ke remains with a demonstrated gymnospermous 



