206 PSEUDOCERATITES OF THE CRETACEOUS. 
the venter at all ages than in P. intercalare, and the volutions are stouter in 
all specimens of the latter that approximate in their markings to this 
species. 
The sutures of syrtale at the same age as that given by Meek (Invert. 
Pal., p. 471) have the same broad first lateral saddles, but the other saddles 
are not so wide as those figured. There are, however, the same number, 
viz, 10. They are all minutely digitate except the tenth, which is entire. 
The living chamber is fully one-half of a volution in length, and part of the 
aperture preserved shows a broad, blunt lateral crest. 
This form is obviously very similar to P. intercalare and may be, if 
one chooses, considered on one side to be identical with P. sancarlosense 
and on the other with P. intercalare. From the former it can be separated 
by the venter, which is not so broad at, any stage, and by the early 
disappearance of the ventral tubercles in the gerontic stage, and the fact 
that the venter becomes rounded only in extreme age and is never flattened 
as in newberryi and its close ally, sancarlosense. 
It can also be separated from intercalare, but the characters are more 
dubious. It is certainly so close that the differences in the specimens so 
far known might be considered as due to the same causes that dwarfed the 
stature of the shells. The young, however, appear to be more compressed 
at the same age in syrtale. 
Locality: Greene County, Ala.; Fort Worth, Tex. 
Age: Probably Taylor marls or Austin limestone, Upper Cretaceous.* 
PLACENTICERAS SYRTALE var. HALEI Hyatt. 
Pl. X XVII, figs. 16, 17; Pl. XXVIII, figs. 3-6. 
This is found in the Hale collection (Boston Society Natural History, 
No. 8577), and approximates to polyopsis of Dujardin. It has, however, 
much heavier lateral nodes and costz in the gerontic stage. The young 
in the later neanic stage, judging from the fragment studied, can hardly be 
«Mr. Stanton has most obligingly written as follows: 
“Locality: ‘Fort Worth, Tex.’ It is not at all probable that the specimen came from Fort 
Worth, though it may have been found some miles east of there. 
““Age: Upper Cretaceous, probably Taylor marls or Austin limestone. 
“ Placenticeras syrtale var. halei Hyatt. 
“Tocality: Greene County, Ala. 
“Age: This specimen is probably from the Eutaw beds, which are probably very near the 
horizon of P. guadalupx, in Texas.”’ 
