OF DENISON UNIVERSITY. 
in almost every important characteristic ; nevertheless in some respects 
it seemed to me to be as closely related to this genus as to any other, 
and until further study may lead me to a more definite result, I con- 
cluded to leave it here.- 
Glabella very convex towards the anterior margin, which is rounded ; 
less convex laterally ; separated from the cheeks by almost straight fur- 
rows, converging behind to about four sevenths the width of the gla- 
bella at its broadest part. At about half the length of the glabella, 
on each side, are two grooves. The middle pair are broadly crescent 
shaped, the points directed downward, distant from one another about 
two fifths the width of the glabella at that point, their general direction 
being lateral; they do not quite reach the lateral margins, however. 
From the ends of these, a second pair of crescent shaped grooves ex- 
tend forward and laterally, reaching the furrows which define the later- 
al sides of the glabella. The second pair does not merge into the 
first at their adjacent extremities. Behind these grooves a third pair, 
distant from each other about two fifths the width of the glabella at 
that point, cut off about one third of the lower half of the glabella; 
they are directed obliquely backwards, at an angle of about sixty de- 
grees with a line extending lengthwise along the glabella; their curva- 
ture is first a little backwards, then more laterally, then a little back- 
wards again, making a gracefully undulated curve which does not quite 
reach the lateral margin of the glabella ; a fourth pair of grooves, cut- 
ting off the last third of the lower half of the glabella, is similar to this pair. 
The occipital furrow is scarcely preserved but seems to have been regu- 
larly curved, the middle of the curve being directed forward. 
Fixed cheeks, at least as far as preserved, highest anteriorly, where 
their convexity is also the greatest. The front margin beginning just 
behind the first pair of grooves on the glabella is curved postero-later- 
ally, then backward and slightly inward, lastly, again postero-laterally 
to the postero- lateral corner of the cheek. The occipital furrow ex- 
tends laterally along the posterior border of the cheek near the mar- 
gin as a deep furrow. Surface smooth. 
Length of the glabella, 4. i mm. ; width at the broadest part, 4. i 
mm.; at the narrowed posterior extremity, 2.4 mm.; width of that 
part of the head included between the postero-lateral corners of the 
fixed cheeks, 5.4 mm.; length of the fixed cheeks, 2.2 mm. 
Locality and position. Soldiers’ Flome Quarry, Clinton Group. 
