BLOCK ISLAND. 61 



In referring our specimens to this protean and widely distributed 

 species I have done so provisionally, as the nervation is sparse 

 or wanting in those which exhibit the best outline, while the one 

 in which the characteristic nervation is shown is merely a frag- 

 ment. Specimens which are entirely satisfactory have, however, 

 been found in New Jersey and on Staten Island, Long Island 

 and Martha's Vineyard. 



Locality: Fig. i, near South East Point; figs. 2, 3, near 

 Black Rock Point, Block Island. 



14. Eucalyptus? nervosa Newb. 

 (PI. IV. Fig. 5b.) 



Eucalyptus? nervosa Newb. Fl. Amboy Clays, p. 112, pL 



xxxii, figs. 3-5, 8. 



In the Flora of the Amboy Clays, on the plate above quoted, 

 Dr. Newberry figures two allied species — the one to which I 

 have referred our specimen and another which he calls Eitca- 

 lyptiisf angustifolia. Our specimen lacks the tip by which it 

 could be definitely identified, but I have little hesitation in re- 

 ferring it to E. nervosa. 



The same species has also been identified from Long Island. 



Locality : near Black Rock Point, Block Island. 



15. Tricalycites papyraceus Newb. 



(PI. III. Fig. 6.) 



Tricalycites papyraceus Nevvb. Fl. Amboy Clays, p. 132, pi. 



xlvi, figs. 30-38. 



Our specimen apparently represents a central lobe of the 

 organism named as above by Dr. Newberry, from Woodbridge, 

 N.J. 



The same species has also been been found on Staten Island 

 and Long Island. 



Locality : Ball's Point, Clay Head, Block Island. 



The evidence afforded by these species is of the highest im- 

 portance, as it serves to definitely correlate the basal clays of 



