ag = : 4g —. 
A 
Geology. 423 
verse pair of lobes, of which the outer one is trihedral and the inner 
one is smaller and conical. These premolars undoubtedly belong to 
the permanent dentition, and if they are not the second and third of 
the series, they are certainly the latter and the fourth. In either case, 
they confirm an opinion formerly expressed (Anc. Fauna of Nebraska, 
p- 45,) that the teeth represented by Prof. Owen, as the third and fourth 
© measurements of some of the molar teeth of Hyopolamus amer- 
tanus are as follows: 
Antero-posterior diameter of the superior last true molar, externally, 134 lines. 
‘Transvers * * “" anteriorly, 15“ 
Antero-posterior diameter of the superior third premolar, * 
“ “ 
Transverse as 8% “ 
Antero-posterior diameter of the superior second premolar, 105. * 
Transyerse “ “ “ 8 4 
3. Second Annual Report of the Geological Survey of the State of 
New Jersey, for the year 1855. 248 pp., 8v renton: 1856.— 
72 scm 
Cook, Assistant Geologist. A good beginning has been made towards 
developing the structure and beds of the Cretaceous formation, a brief 
shell marl, sand, clay and gravel which make up the southeastern part 
of the State. 
Evidences of wear and subsidence along the New Jersey coast are 
mentioned on pages 78—81, which merit a full investigation. We cite 
the following paragraphs :— 
During t 
; and this 
was thought there must be some general cause for them; an 
onuee Si to be, the slow but continued settling or subsidence of 
the land, 
At the th of Dennis creek, in Cape May county, and for several 
miles a Se Sp = side of it, according to the local 
