Foerste.] 
286 
[May 1, 
at the end of the annulations. The connecting tube of the siphon 
has a diameter somewhere near 2 mm. 
From 0. Youngi this species is readily distinguished the much 
smaller apical angle. 
Orthoceras (Actinoceras) Daytonensis, sp. nov. 
(PLATE VIII, FIG 6.) 
The type specimen was found at the Soldiers’ Home, near Day- 
ton, Ohio. It is 24 mm. long and has in that length eight cham- 
bers and nine septa. The diameter of the shell at the smaller end 
is 22.2 mm., ht the larger extremity 26 mm. The septa are about 
3 mm. distant from each other where the diameter of the shell is 
23 mm. The septa are moderately concave, forming an arc of about 
108°. The siphon is almost central, the annulations between the 
septa being 5.5 mm. wide where the diameter of the shell is 23mm. 
The height of the annula is about 2.5 mm. the siphons continuing 
for the remaining .5 mm. between the septa, as an abruptly nar- 
rowed tube, 1.4 mm. in diameter. The surface of the shell is un- 
known. 
Orthoceras (Discosorus) conoideus, Hall. 
Forms essentially like those figured from New York are not un- 
common in the Clinton group, at Todd’s Fork, near Wilmington, 
Ohio. All specimens seen are from the cabinet of Dr. L. B. Welch 
of Wilmington, Ohio. 
Orthoceras (peculiar type) inceptum, Foerste. 
Since this species was published nothing new has been added to 
our knowledge of this form. The position of the siphon where it 
passes through the septa is correctly described, but its character 
between the septa, I have now reason to believe was incorrectly 
identified and still remains to be determined. The structure along 
one side of the casts of the interior of the shell, suggests relation- 
ship with Bathmoceras ; the position of the siphon is however more 
central than I have seen in that genus and I have not had any 
opportunity for several years to collect more material. 
Conularia Niagarensis, Hall. 
(PLATE V, FIG. 16.) 
A single specimen was found at Todd’s Fork, near Wilming- 
