HALLSTADT BEDS. 
65 
uncommon in the trias beds. One of the most remarkable of 
them—with long spout-like contracted mouth, and thick 
varices—is the A. delphinocephalits, Y. Hauer ; A. bicornis and 
A. semiglobosus are other forms of the like character. Some of 
them have been made into a distinct; genus, Clydonites , by 
Yon Hauer. 
The simple septa made us at first believe we had the young 
of a larger species. The striated coat is an epidermis, and does 
not belong to the actual shell. 
Our largest specimens are a good half-inch wide, and seven- 
tenths across the mouth. 
AMMONITES AUSSEEANUS.-F Hauer ? 
Young. Plate 7, fig. 2. 
V. Hauer. Naturwiss. Abhandl., vol. i., pi. 8, f. 6-8. 
If this be a correct reference, it can only be the young state 
with the usual Goniatite-lobes. The adult state is a globular 
mass, some inches across. 
AMMONITES--^. 
Plate 7, fig. 4, and plate 8, fig. 1. 
It must be the young state of one of the following species. 
AMMONITES GAYTANI.-A^sto. 
Plate 7, figs. 7, 8. 
Klipstein, Geol. Ost. Alp., t. 5, f. 4. F. Von Hauer, Naturw. Abli., 
vol. iii., t. 4, f. 13, 14. 
It is possible that one of these may be the A. Johannh- 
Austrice, Klipst. But I think not, the lobes are too simple, 
and ours are not very young shells. 
The striation of the surface is hardly distinct enough to 
judge by. But it is stronger than is figured in A. Gaytani, 
VOL. II. k. 
