OLDER rUTU-MAC OK \lK(iINIA AND MAKYLAND. 571 



KO>;>iII. rl. ANTS FROM SI>UIN<;KIKI.n. 



[V\. LXXX. NO. 2(1.] 



Tlie plants now in qnostion arc (lo.si<j;natod on the labels accompany- 

 ing them as coming fi'oni Spi-ingheld, and the formation yielding them 

 is given as Patuxent. The rock material yielding the fossils is a reddish 

 brown sandstone, whidi is iiighly ferruginous, witli a cement of limonite. 

 Although there is a considerable amount of this material, not Tuaiiy of 

 the plant impressions can be determined, owing to the fact that it is 

 not favorable for their i)res(>r'vation. The fi'agments of plants are nuich 

 macerated and seem to have floated long in water. Most of the plant 

 matter is in the form of decayed bits of stems that can not be determined. 

 These spei-imens were collectetl by Mr. Bibbins in August, 1894, for 

 the nuiseum of the Woman's College of Baltimore, whose numbers are 

 on the laljels. 



The following plants have tjeen found at this locality: 



At lir()tax()j)sis oxpansa Font. '. :i specimens. 



Athrotaxopsis tenuicaulis Font .1 specimen. 



Equisetum Lyellii Mant. '. 2 specimens. 



Sequoia subulata Heer '( 2 specimens. 



Tlm-so])teris nervosa Font. ? 1 specimen. 



This list, as will be seen, is a very small one, and only one specimen, 

 Athwtdxopsis tenuicaulis, is capable of positive determination. 



These plants are not sufficient to determine the age of the strata 

 containing them, but so far as their evidence goes, it indicates that it 

 is that of the lowest portion of the Lower Potomac, the Rappahannock, 

 and the James River series of Professor Ward. 



FOSSIL PLANTS FKOll STKMMKRS KIX. 



[Pi. LXXX, No. 41.] 



Hengmehl's iron mine, Stemmers Run, furnishes one specimen 

 which can not be determined." 



in some small pocket of Pleistocene (Columbia) clay, such as that which is sometimes found in excavating 

 cellars, etc., in Washington, and which usually contains the remains of so-called cedar wood in a perfect state 

 of preservation. Such a case occurred at the "Casino" on Coimecticut avenue, and similar deposits have 

 been found in the eastern part of the city, the Potomac clnvs immediately underlyin;; the Columhia beds. — 

 L. F. W. 



« It is from this general region that the cycad, Cyaideoiika Fishent, described above (p. -170 i. was 

 obtained. — L. F. W. 



