646 
DR. J. W. DAWSON ON ERECT TREES CONTAINING- ANIMAL 
Labyrinthodontia. 
10. Dendrerpeton Acadian fan . 9 specimens. Trees No. 1, 2, 5, 8, 12, 13, 19, 24. 
11. D. Omni .4 „ „ 8, 16, 19. 
Incertce Sedis. 
12. Sparodus , sp. (?).... 1 specimen. Tree No. 10. 
* Total individuals, 53. 
The negative result that, under the exceptionally favourable conditions presented 
by these erect trees, no remains of any animals of higher rank than the Microsanrict 
and Labyrinthodontia have been found deserves notice here. It seems to show that 
no small quadrupeds of higher grade inhabited the forests of Nova Scotia at the 
period in question. This is perhaps confirmed by the remarkably Lacertilian cha¬ 
racters assumed by the Microscturia of the period, which seem to have occupied the 
place now taken by the smaller true reptiles. That there were larger Labyrintho- 
donts than those found in the erect trees we know from the Baphetes planiceps of 
the Pictou coal,'"" and from the remarkable footprints of Sauropus Sydnensis t and 
Sauropus ungiiifer. j It is to be observed also that as some of the amphibian animals 
found in the erect trees are represented only by single specimens, there may have 
been still rarer species, which may be discovered should other trees be exposed. Nor 
must we forget that the fauna of those swamps and low-lying plains of the carbonife¬ 
rous period, to which our knowledge is at present limited, may not fully represent 
that of the uplands of the period. 
With reference to the probability of the discovery of additional remains in the beds 
to which this paper relates, I may state that new trees will no doubt be exposed from 
time to time by the gradual wasting of the cliff. Otherwise additional specimens can 
be procured only by regular mining operations canted on in the 6-inch coal and its 
roof. These -would of course be costly, and the small amount of coal afforded by the 
6-inch seam would contribute very little towards defraying the expense. 
* Journal of Geological Society, vols. x. and xi.; ‘ Air-breathers of the Coal Period ;’ ‘ Acad, Geology,’ 
p. 359. 
f £ Acadian Geology,’ p. 358. 
4 ‘ Geological Magazine,' vol. ix. 
