Maryland Geological Survey 219 



Cretaceous. Whether the detailed organization of the fructifications con- 

 forms to that which obtains in the modem members of the family cannot 

 be determined; presumably there were dilferences, but these were prob- 

 ably not greater than those between the existing genera referred to this 

 family. A restoration of the fossil drawn from the specimen here figured 

 is shown in text fig. 2. 



Since Baieropsis expansa was the type of Fontaine's genus Baieropsis 

 it cannot be made the type of the new genus Schizceopsis, and it is there- 

 fore referred to the older genus Acrosticltopteris, with the members of 

 which it agrees in its kno^7n characters. The single specimen from 

 Fredericksburg, which is the type of the present species and genus, and 

 which is different from Baieropsis expansa, as defined by Fontaine, must 

 therefore be renamed, a fact which was overlooked when the writer de- 

 scribed the present species. 



It is very probable that the widespread Baiera cretosa Schenk,^ recorded 

 by Heer,^ from the Kome beds of Greenland, and by Dawson ^ from the 

 Kootanie of British Columbia, both of these latter records, as well as 

 Schenk's type material from the Barremian of Austrian Silesia (Werns- 

 dorfer Schichten) being fragmentary,* is related to ScMzceopsis, as may 

 also be Jeanpaulia nervosa Dunker ° of the Wealden of Germany. The 

 evidence for considering them referable to the Ginkgoales is certainly 

 very inconclusive, in fact Schenk originally compared his specimens with 

 the modern ScMzoia elegans, and they are all very different from the true 

 Baiera of the Patuxent formation. 



Occurrence. — Patuxent Formation. Fredericksburg, Virginia. 



Collection. — U. S. National Museum. 



^ Schenk, Pal^ontograpliica, Band xix, 1869, p. 5, pi. i, fig. 7. 



^Heer, Fl. Foss. Arct., Band iii, Abth. ii, 1874, pp. 59, 124, pi. xiii, figs. 13, 

 14; pi. xvii, fig. 12; pi. xxxv, figs. 8-10 (SclerophyllinaJ : IMd., Band vi, 

 Abth. ii, 1882, p. 14 (Baiera). 



^ Dawson, Trans. Roy. Soc. Canada, vol. iii, sec. iv, 1885, p. 9, pi. ii, fig. 5 

 (Baiera longifoUa). 



*Nathorst (Kungl. Svenska Veten. Akad. Handl. Band xxx, 1897, No. 1, 

 p. 33), considers the specimens from Spitzbergen which Heer referred to 

 this species in 1877 (lac. cit., Band iv, p. 49) to be fragments of fern stems. 



^ Dunker, Mon. Norddeutsch. Wealdenbildung, 1846, p. 12, pi. v, fig. 3. 



