Foerste.] 
274 
[May 1 , 
CORNULITES DISTANS, Hall. 
(PLATE Y, FIG. 7 ; PLATE VI, FIGS. 11, 19.) 
Tentaculites distans , Hall, has later been identified by the same 
author as a species of Cornulites. It is found in the Clinton of 
New York. 
In the Cumberland Gap, Tennessee, collections, this species oc- 
curs in moderate numbers, the largest specimen observed attaining 
a length of 16 mm. and a width of 3 mm. Their form is inverted 
conical, tapering equally throughout. The cone is externally marked 
by annulations which are sharply defined on the side towards the 
apex, but usually less distinctly defined towards the opposite ex- 
tremity, although specimens occur in which these annulations are 
fairly distinct also on the oral side, when the subimbricated struct- 
ure gives way to a rather more annulated type, and they have more 
the appearance of Tentaculites. 
With growth the annulations become more distant, so that seven 
may occur in a length of 5 mm. in specimens 11 mm. long ; six to- 
wards the mouth of specimens 16 mm. long; and in fragments 
which represent perhaps an original length of 20 mm. five and one- 
fifth annulations occur in a length of 5 mm. 
At Collinsville, Alabama, the same species occurs. A very typ- 
ical specimen is 15.5 mm. long, 3 mm. broad at the oral extremity, 
with four and one-half annulations in a length of 4 mm. The an- 
nulations are sharply defined towards the pointed extremity and 
slope gradually towards the oral extremity, presenting a sort of 
subimbricate appearance. 
Cornulites serpularius, Schlotheim, var. clintoni, Hall. 
(PLATE V, FIG. 8; PLATE VII, FIG. 8.) 
Cornulites flexuosus, Hall, from the Clinton of New York, is now 
placed by the same author under Cornulites Clintoni , Hall, the other 
name having been preoccupied by a Lower Silurian species. 
Cornulites Clintoni is represented by a single specimen in the 
Cumberland Gap, Tennessee, collections, a cast of the interior. It 
is 11.3 mm. long, 4 mm. wide at one end and 6 mm. at the oppo- 
site extremity. This fragment consists of five segments, separated 
from each other by constrictions ; the different segments increase 
moderately in width towards the aboral extremity, then bending 
