226 THE POTOMAC OR YOUNGEE MESOZOIC FLOKA, 



AMENT of CONIPER (c), SI). ? 

 Plate CXXXVI, Fig. 4. 



Aments globose or broadly oblong, very small and varying in size, 

 the largest being five by three millimeters ; scales arranged as in species (a) 

 and (h), thin, subacute at their tips, closely appressed, minute, narrowly 

 elliptical in shape, numerous, and spirally arranged, somewhat imbricated. 



Locality : 72d mile-post, near Brooke. 



They occur on a few pieces of shale in considerable numbers crowded 

 together ; seem to be different from species («) and (&) in the smaller and 

 more variable size and the more rounded form and in the narrowly elliptic 

 shape of the scales. 



Ament of Conifer (d), sp. ? 



Plate CXXXVI, Fig. 5. 



Aments mostly ovate, sometimes elliptical, varying somewhat in size, 

 averaging five by thi-ee millimeters, broadest at base and narrowed above to 

 an acute tip ; scales in number and arrangement as in the preceding species, 

 in shape broadly elliptical to ovate, prolonged at the summit to a very 

 short acute tip. 



Locality: On the railroad near Cherry Hill Station. 



This station is on the Alexandria and Fredericksburg portion of the 

 Atlantic Coast Line Railroad, midway between Quantico and Powell's 

 Creeks. The aments are found in the shale in a cut a little north of the 

 station. They occur crowded in considerable numbers on the surface of a 

 few specimens of the rock. No prolonged search was made here, as there 

 did not seem to be any prospect of finding good material. With these 

 were found a few obscure imprints of some conifer with acicular leaves. 



Ament of conifer (e), sp.? 



Plate CXXXV, Fig. 7. 



An ament, elongate-oblong in form, very narrow in proportion to its 

 length, with numerous chaffy scales imbricated on a slender axis, in- 

 curved and spoon-shaped. 



