40 CRETACEOUS GROUP 
monite. If it be not identical with the preceding species, I 
propose the name of A. petechialis. 
Variety C. Pl. xix. fig. 4. 
Elongated like a scaphite, the whorls being more distinct, 
and less in diameter, than in any one of the preceding varieties. 
At first I pronounced it a Scaphite, but it appears to 
glide by degrees into the A. Conradi. If it be not the 
same, it may be called A. navicularis. That it is not 
a Scaphite, but an accidentally elongated Ammonite, I 
am entirely certain. I have one fragment of A. Conradi, 
which must have been upwards of four inches in dia- 
meter. 
6...A. syrialis. (S. G. M.) PL xiv. fig. av. 
Specific Character. Shell much compressed, but widening 
rapidly towards the aperture; two series of nodes, one on the 
umbilical margin, the other near the periphery; nodes but 
little elevated, except on the umbilical margin, near the aper- 
ture, where they are profoundly elevated: periphery with two 
series of pyramidal nodules, giving it a dentated appearance ; 
septe distant, sigmoidal. Greatest diameter about three inches. 
From the older cretaceous deposits of Greene county, 
Alabama. 
7, A. wesperiinus. (S..G. M.) Pl. xvi. tes 1. 
Specific Character. Volutions uncertain; each whorl fur- 
nished with profoundly elevated transverse ridges, with three 
slight nodes on each; that on the margin most prominent. 
Length of the fragment 1384 inches. 
My friend Dr. Z. Pitcher, of the United States’ army, | 
has presented me with several large fragments of this Am- 
monite, from the plains of Kiamesha, in Arkansaw.; where 
