370 Systematic Paleontology 



Cycadeospeemum spatulatum Fontaine 



Cycadeospermum spatulatum Fontaine, 1890, Mon. U. S. Geol. Survey, vol. 



XV, 1889, p. 271, pi. cxxxv, figs. 11, 21. 

 Cycadeospermum elUpticum Fontaine, 1890, IMd., fig. 19. 

 Cycadeospermum elUpticum Fontaine, 1906, in Ward, Mon. U. S. Geol. 



Survey, vol. xlviii, 1905, p. 520. 



Description. — Seeds of considerable size, 15 mm. to 17 mm. in length 

 by 12 mm. to 13 mm. in longest lateral diameter, nearly orbicular in 

 outline, sometimes slightly truncated at one end and bluntly pointed 

 at the other. Surface smooth and glossy. Apparently of a firm and 

 durable consistency. 



This species is based on a number of specimens from near Dutch 

 Gap Canal on the James River, Virginia, and upon rare occurrences of 

 similar objects at Fredericksburg, and near Potomac Run, in the same 

 State, and two specimens from Langdon, in the District of Columbia. 



Occurrence.— Patuxent Formation. Fredericksburg, Dutch Gap, 

 Potomac Run, Virginia. Arundel Formation. Langdon, District of 

 Columbia. 



Collection. — U. S. Rational Museum. 



Class GYMNOSPERMAE 



Order GINKGOALES 



Family GINKGOACEAE 



Genus BAIERA Fr Braun 

 [Flora, Neue Reilie, Jalirg. 24, 1841, p. 33] 



This genus was defined by Braun as follows: "Venae primarise 

 frondis pluries dichotomse; vense secundaria ae venulge in areas hexa- 

 gonales elongatas irregulariter confluentes; Sporocarpia capsulseformia, 

 ovalia pedunculata, ternata vel biternata.'^ (1843, p. 20.) 



The type was Baiera dichotoma from the Rhaetic of Strullendorf, 

 Bavaria. In Braun's contribution to Miinsters Beitrage zur Petrefacten- 

 kunde, which is often cited as the original place of publication, as for 

 example in Seward's Jurassic Flora, five species are referred to this 



