14 UNDETERMINED CROCODILES. 
IT have not had the opportunity of inspecting other fossil remains which may 
positively be referred to the Bottosawrus Harlani. 
Among the fossils from the New Jersey Green Sand, described by Mr. Owen, in 
the Journal of the Geological Society, Vol. V. p. 380, before mentioned, there was 
a cervical vertebra of a crocodilian different from that upon which he proposed the 
name of Crocodilus basifissus. 'This second vertebra, from its having the inferior 
apophysis of the body, or the hypapophysis, short and flattened, he views as indi- 
cating a species, for which he has proposed the name of Crocodilus basitruncatus. 
The vertebra, supposed to characterize the latter, is of a size which relates to that 
of the individual to which the jaw fragments above described belong, and probably 
also appertained tq Harlan’s Crocodile. 
Since writing the above there have been presented to the Academy, by Horatio 
C. Wood, a number of small fragments of the lower jaw of Bottosaurus Harlani, 
from Burlington County, N. J. The specimens, however, present nce further char- 
acters in relation to the species. Accompanying them there is a tooth, represented 
in Fig. 14, Plate X VIII, which is a reduced one of the sameform as that already 
described. . 
I have also recently received for examination, from the Burlington Co. Lyceum 
of Natural History, several small fragments of a jaw, two teeth, and a large costal 
rib, probably belonging to the same species. | 
The fragments of a jaw are uncharacteristic. One of the teeth has a quadri- 
lateral fang two and a half inches in circumference. The crown is quadrate mam- 
miliform, but has lost the greater part of its enamel. ‘The other tooth is represented 
in Fig. 18, Plate XVIII. It has a compressed cylindrical fang a little less in cir- 
cumference than the preceding. The crown is compressed mammiliform, strongly 
rugose, and has its inner and outer faces defined by prominent carina-like ridges. 
It measures cight and a half lines long, ten lines wide at base, and seven and a half 
lines from without inwardly. 
Undetermined Species of Crocodiles. 
Of other remains of Crocodiles, with vertebre constructed on the same plan as 
the living representatives of the family, I have seen a number of specimens from 
the Green-sand of New Jersey apparently indicating several species different from 
the preceding. Among these is a collection of bones belonging to the same indi- 
vidual, from Timber Creek, Gloucester County, N, J., presented to the Academy 
by W. P. Foulke. They consist of two cervical, a dorsal, the sacral, and two caudal 
vertebrie, and portions of both humeri. The vertebre indicate an adult animal, as 
the arches are completely united with their respective bodies, and those of the 
sacrum are firmly coosified. Their comparatively small size renders it improbable 
that they should belong to either of the species previously indicated. 
The bones are black, heavy, and firm, but unfortunately the vertebrae have had 
most of their processes broken off since their discovery. 
The least mutilated of the cervical vertebra, apparently the sixth, represented in 
Fig. 12; Plate III, is rather less than two inches in length, independent of the 
