No. 385.] FORESTRY AND GEOLOGY. 9 
of Pinus rigida and Diospyros Virginiana, although both 
species are conspicuous by their absence elsewhere in the 
vicinity. 
In the neighborhood of Freehold some of the species which 
were sparsely represented before become more prominent, and 
then a marked change occurs as soon as the border of the main 
marl belt is passed. In place of the almost exclusively decidu- 
ous vegetation, patches of Pinus rigida become prominent; and 
these continue until the marl area at Farmingdale is reached, 
when the pines disappear and are not again met with until the 
area is crossed. By this route it may be seen that the entire 
- width of the tension zone is crossed where the relations of the 
two floras are the most complicated. 
Another interesting locality is the vicinity of Perth Amboy, 
where the terminal moraine extends beyond the Triassic border 
and encroaches for a short distance on the Cretaceous. Here 
the typical deciduous flora, which elsewhere is coterminous 
with the border of the Triassic, is in existence beyond, follow- 
ing the edge of the moraine, where it is in sharp contrast with 
the tension zone representatives of the coniferous flora, which 
here reach their most northern limit in the state. 
At many other localities the same or similar facts may be 
noted, but the above instances are probably sufficient to illus- 
trate the general facts of distribution. 
In order to illustrate some facts of specific distribution, the 
following examples are taken : 
Tsuga Canadensis. — More or less abundant in the deciduous 
zone, especially in hilly and rocky regions along the borders of 
streams. Not recorded south of the tension zone, except indef- 
initely as very rare, in Ocean and Monmouth Counties. The 
only exact localities known to me south of the Triassic border 
are New Egypt, Vincenttown, and Burlington, all within the 
tension zone. 
Rhododendron maximum. — Abundant in the deciduous zone, 
often forming dense thickets along streams and lake borders. 
Recorded from but one locality south of the tension zone, at 
Sicklerville, and from two within the zone, at Burlington and 
Kinkora. 
