488 MESOZOIC FLORAS OF UNITED STATES. 



that the horizon is that of the Aquia Creek series, but the matrix carry- 

 ing the plants is somewhat different from that of the two localities given 

 above. As it is on the same horizon its fossils may be noticed in this 

 place and the locality be denoted as "Hunter's unknown localitj^" 

 The following collections have been made at these localities: 



1. On November 6, 1892, a dozen or more small specimens of fossils belonging 

 to the Aquia Creek or Brooke beds were collected by Lester F. Ward and Victor 

 Mason on the Mount Vernon estate, in the bluff in which the Mount Vernon chocolate 

 clays were fii'st discovered and immediately over the principal plant bed in these 

 clays. 



2. On November 20, 1892, the same jDarty collected half a dozen specimens from 

 the original locality of Fontaine. It had suffered considerable alteration from 

 caving and sloughing, and the specimens were taken from the extreme left (south 

 end), under the roots of a tree. 



.3. On May 14, 1893, Mr. William Hunter, who had pi'eviously discovered the 

 locality, guided the party above mentioned to what has been designated "Hunter's 

 known locality," where between 30 and 40 specimens were obtained. 



4. The same party visited on the same day the Mount Vernon bluff, where 

 besides the Mount Vernon plants, of which a large collection was made, they 

 obtained one fine specimen from the immediately overlying Brooke beds. This 

 locality is the same as No. 1, above. 



5. A second smaller collection was made from the last-mentioned locality by 

 WiUiam Hunter and Lester F. Ward on August 8, 1893. 



6. Mr. Hunter made a collection of more than a dozen specimens from White 

 House Bluff' in 1895, the exact location of which was not stated on the labels. This 

 is the one designated "Hunter's unknown locality." 



The size of the collections made at the different localities varies 

 much. This difference is due to the greater effort made to collect at 

 some than at others. But little effort apparently was made to get 

 additional specimens from Fontaine's locality, as a considerable amount 

 of material had been obtained from it previously. Hence the number 

 of specimens from this spot now to be noticed is very small. The 

 specimens from Hunter's unknown locality are very few, probably 

 because but a short time was devoted to securing them. A good many 

 more were obtained from Ward's locality and from Hunter's known 

 locality. From these facts the absence of specimens found at the two 

 localities last named from the localities yielding the small collections 

 does not necessarily imply their actual absence. 



