194 THE AMERICAN NATURALIST [Vov. XL 
It was not until many years after Hitchcock’s description was 
published that any further discovery of similar remains was made, 
or at least recorded, and to Professor Oswald Heer belongs the 
credit of first recognizing their affinities with the living Coniferous 
genus Dammara, in his description of specimens identical with 
those from Gay Head, under the name D. borealis,’ from the 
Cretaceous of Greenland, in his discussion of which he says (p. 55): 
“Es haben diese Schuppen so grosse Aehnlichkeit mit derjenigen 
von Dammara (Agathis), dass wir sie derselben Gattung zutheil- 
en diirfen.”” For purposes of comparison a figure of this species, 
representing a specimen collected at Gay Head, is shown on Plate 
1, Fig. 1. 
Two other so called species were also described and figured 
by the same author, viz.: D. microlepis? and D. macrosperma.* 
A specimen of the former, collected at the Gay Head locality, is 
shown on Plate 1, Fig. 2, which, by comparison, may be seen to 
differ from D. borealis merely in size. D. macrosperma has not 
been recognized in any collection of material except that from 
Greenland, and it is doubtful if it should be regarded as speci- 
fically distinct from the other two. In other words all three of 
these so called species might very well be included under D. 
borealis. 
Heer was evidently in considerable doubt in regard to the 
identity of some of his specimens and also with regard to their 
botanical relationships. In his discussion of D. microlepis for 
example he says (p. 55, loc. cit.): “Hat einige Aehnlichkeit mit 
den Bliithenknospen des Eucalyptus Geinitzi,” and a comparison 
with the figures of the objects which he refers to the fruit of that 
species * shows them to be so closely similar in appearance to his 
Dammara scales as to be practically indistinguishable from them. 
Krasser, Beyer, and Velenovsky subsequently described and 
figured similar remains from the Cretaceous of Europe, with vary- 
ing opinions as to their probable botanical affinities. The last 
b%  , PhO fi 6, N82. 
. 11, 1883. 
45, ‘figs. 4-9, 1882. 
