CAMBRIAN FAUNAS. nally’ 
PTYCHOPARIA NEWTONENSIS 0. Sp. 
Plate III., Fig. 10. 
Description.—Glabella tumid, subquadrangular in outline, the lat- 
eral margins parallel, broadly rounded anteriorly, slightly contracted 
posteriorly just in front of the occipital furrow; marked by two 
pairs of lateral furrows, of which the anterior pair is near the centre 
of the glabella; all the furrows curve backward as they approach 
the median line of the glabella, and extend about one-third of the 
distance across it. Occipital furrow well defined; occipital segment 
with parallel margins, a little narrower than the width of the glabella, 
Fixed cheeks broad behind, becoming much narrower in front. Pal- 
pebral lobes situated at about the middle of the total length of the 
head. Anterior border not preserved, but apparently rather broad, 
connecting the fixed cheeks around the front of the glabella. Free 
cheeks, thorax and pygidium unknown. 
The approximate dimensions of the type specimen are: length, 3.5 
mm.; width, 4.75 mm. 
PTYCHOPARIA CALCIFERA Walcott. ? 
Plate I., Fig. 14. 
1879. Conocephahtes calciferus Walc., 82d Rep. N. Y. State Mus. 
Nat. eigt pe dli29: 
1886. Ptychoparia calcifera Wale., Bull. U. S. Geol. Surv., No. 30, 
Daa. 
Among the specimens from near Blairstown is a single, fragmentary 
individual, which may belong to Ptychoparia calcifera Walec., origi- 
nally described from the upper Cambrian of Saratoga county, New 
York. Nothing is preserved except the occipital segment of the head, 
which is produced into a long spine as in that species. 
