Vol. 58.] PHYLLOCARIDA FROM PENNSYLVANIA. . 443 
Ecurnocaris Ranpatuit, sp. nov. (Pl. XVIII, fig. 8.) 
Three right valves represent this species in the present collection. 
Two are preserved in a fine-grained sandstone, while a third is from 
an arenaceous and micaceous shale. One of the sandstone-specimens 
is taken as the type. The valve is broadly ovate, widest in front, 
moderately convex, width more than half the length. Hinge-line 
about equal to the width of the valve. The nuchal furrow starts 
near the middle of the hinge-line, curving outward and forward to 
the margin. Cephalic area marked by a node (the maxillar ?) 
adjacent | to the hinge, with triangular base, a much larger lobe (the 
mandibular), about four times the size of the smaller one, occupying 
the remainder of the area. One of the specimens has two minute 
lobes (the antennal) in front, at the inner extremity of the mandi- 
bular lobe. 
The thoracic region has two subequal transverse lobes adjacent 
to the nuchal furrow, between the hinge and the carina. The 
carina starts near the anterior ventral angle and makes a sigmoid 
curve, extending along the ventral border; then, following parallel 
to the posterior -margin, it turns forward over the middle of the 
valve, and becomes obsolete before reaching the lobes. 
The surface of the cephalic and thoracic lobes is marked by minute 
pustules, and the summit of the carina has one or two rows of similar 
pustules. The border of the valve is somewhat thickened and 
reflexed, but is apparently without ornamentation. 
Abdomen and postabdomen unknown. 
The type-specimen, consisting of a right valve, has a length of 
13 millimetres and a width of 9 mm. 
Distribution.—In the sandstones and shales of the Waverly 
Group of the Lower Carboniferous, near Warren (Pennsylvania). 
This species much resembles the Devonian £. socialis, but may be 
readily distinguished by the form and arrangement of the nodes and 
carina, and by its less highly ornamented surface. ‘The specific 
name is given in honour of the veteran geologist of py onren County, 
Mr. F. A. Randall. 
Ecurnocaris Ciarkil, sp. nov. (Pl. XVIII, fig. 9.) 
The only specimen of this species thus far obtained is a nearly 
complete individual, with the carapace, abdomen, and postabdomen 
connected. The valves seem to have been quite tenuous, except 
along the margin, and have suffered from compression, so that the 
precise number and form of the nodes cannot be determined. 
The valves are nearly elliptical in outline, with the margins 
considerably thickened, reflexed, and angulated. The outer margin 
is denticulate around the entire free edges of the valves, and there 
are also minute nodes along the angulation in the posterior and 
anterior regions. A nodose carina extends nearly parallel to the 
ventral border, and a row of granulesis present in the mid-thoracic 
area. 
