jowlton.] DESCRIPTION OF SPECIES. 69 
Both of the specimens figured by Lesquereux as the American types 
f this species are preserved in the United States National .Museum 
Sos. 355, 356). They are both somewhat fragmentary, yet are suf- 
ciently preserved to show their general character. Both come from 
le andesitic beds at Golden, Colorado, and are like a number of more 
r less fragmentary specimens obtained at the same place in recent 
ears. 
The specimen obtained at Point of Rocks, Wyoming, by Professor 
Pard, is fortunate in having the base and petiole preserved. It appears 
) agree closely with the specimen figured by Lesquereux, except that 
has a thicker petiole, and the nervilles are not strictly at right 
Qgles to the midrib. 
As Lesquereux has pointed out, and as further emphasized by the 
uestion mark placed by him after the species, there is some doubt as 
> the correctness of the specific determination. They are much larger 
lan the European specimens, and differ in having the nerves branched 
3ar the borders. According to Schenk l there is also doubt as to the 
3neric reference of certain of the leaves described as Cornus, especially 
. Studeri. The American specimens appear to be closely allied to 
aves from the same beds that have been called Ficus. Thus they may 
3 compared with certain leaves of F. spectabilis Lx., 2 F. irregularis Lx., :J 
. uncata Lx., 4 and F. artocarpoides Lx. 5 From the latter they differ, 
)wever, in being wedge-shaped instead of heart shaped at base. The 
M'vation and outside branching of the nerves Mear the margin are 
lite similar in both. 
The thick petiole mentioned above in connection with the Point of 
ocks specimen is a further argument for referring them to Ficus. 
le leaves from Golden are also suggestive of certain large examples 
Rhamnus Cleburni Lx., ,; which, however, may possibly have to be 
ferred to Ficus also. 
Taking everything into consideration, it would probably be best to 
►andon Cornus Studeri as an American plant, and either refer the 
i&rious specimens to some known species of Ficus, or possibly create 
new species for them. But I have hesitated to make this change, 
I nothing certain has been discovered since the original work of 
isquereux. 
Professor Ward's collection from Point of Rocks contains also 
other fine leaf which I refer to this species. It is narrower than the 
■ e shown in fig. 3, but has the same arrangement of secondaries as 
isquereux's. 
Habitat. — Golden, Colorado. Point of Rocks, Wyoming. 
1 Die Fossilen Pflanzenreste, p. 236. 
s T.rl. I']., PI. XXXII, fig. 4. 
3 Ibid., PI. XXXIV, fig. 4. 
4 Ibid., PI. XXXIV, fig. 2. 
6 Cret. and Tert. PI., ]>. 227. PL XL VI I. figs. 1-5. 
«Tert. FL, PL L1II. figs. 1-3. 
