806 SYSTEMATIC PALEONTOLOGY 



resemblance is heightened by occasional specimens (Heer) showing the 

 tuft of leaves subtended proximad by a few small scale-leaves, as in the 

 short shoots of Pinus. In Czekanowski, however, unmistakable dicho- 

 tomy is frequent, and this habit has been one of the main factors in its 

 reference to the Ginkgoales which are so abundant and varied during the 

 Mesozoic. 



Occurrence. RARITAN FORMATION. Forked Creek, Severn River, 

 Anne Arundel County. 



Collection. Johns Hopkins University. 



ANGIOSPERMOPHYTA 

 CLASS MONOCOTYLEDONAE 



Genus DORYANTHITES Berry 

 [Bull. Torrey Bot. Club, vol. xxxviii, 1911, p. 406] 



DORYANTHITES CRETACEA Berry 

 Plate LVI, Fig. 6 



Doryanthites cretacea Berry, 1911, Bull. Torrey Bot. Club, vol. xxxviii, p. 



406. 

 Doryanthites cretacea Berry, 1914, Prof. Paper U. S. Geol. Survey, No. 84, 



p. 108, pi. xvii, fig. 3. 



Description. Leaves, as preserved, linear, presumably lanceolate above 

 and sheathing below, 4.5 cm. to 6 cm. in width and preserved without any 

 diminution in width for a length of 50 cm. Texture very coriaceous. 

 Margins entire. Veins simple and parallel, immersed, considerably less 

 than 1 mm. apart. Leaves alike on both surfaces. In the hollows between 

 the veins occur rows of small stomata with the guard cells all oriented in 

 a direction parallel with the veins and equally numerous on both surfaces 

 of the leaf. Leaf surfaces under the microscope appearing finely striated 

 parallel with the veins. 



These curious remains, which call to mind the leaves of the Paleozoic 

 Cordaites or some modern giant Bromeliad, are not uncommon in the 

 Upper Cretaceous. They were first discovered by the writer in the Black 

 Creek formation of North Carolina, and it is from this material that the 



