64 
UPPER TRIAS; OR 
Closely allied to Amm. coangustatus, Hauer (Sitz. Bericlite; 
vol. xli.; t. 5; fig. 1). But that species is less compressed; 
has a less number of whorls; and the last whorl increases less 
rapidly than ours. 
A . Morloti, Hauer; -Naturw. Abh.; vol. iii.; pi. 2, has a 
steeper umbilicus. 
AMMONITES. 
Plate 6; fig. 3. 
A fragment of another smooth discoid ammonite; with very 
simple foliated sutures. It can hardly be A. Neojurensis, Quenstedt 
(A. clebilis, Yon II.); a species with more rapidly increas¬ 
ing whorls and complicated sutures. But I see no other 
species to compare it with; and Prof. Suess suggested this one. 
It is a little like A. Morloti, Y. Hauer. 
AMMONITES.— 
Plate 6; fig. 4. 
Another fragment of a large discoid shell, with simple 
scrratodentate lobes; much like those of other triassic ammo¬ 
nites. 
The simplicity of the sutures recalls those of the lias 
ammonites figured by Quenstedt as A. Conybeari, A. Turneri , 
&C.; &C. 
Locality .—Gunesgunga. 
Pig. 4; pi. 8; is the young of some one of the foregoing 
Ammonites. 
AMMONITES DIFFISSUS.-I/awer. 
Plate 7; fig. 3 (fig. 1 ?). 
Von Hauer. Sitzung-Berichte, Ivais. Akad., vol. xli., t. 4, f. 11-13. 
Little need be added to Von Hauer’s description and figure 
of this curiously-deformed ammonite ; one of a group not at all 
