PACKARD.] PHYLLOPODS OF NORTH AMERICA. 309 
Six specimens from Dubuque, Iowa, collected by Rev. A. B. Kendig. 
Six specimens from “Grindstone Creek, half way from Fort Pierre to 
the Bad Lands, Dakota,” collected by Dr. F. V. Hayden, and received 
from the Chicago Academy of Science through Dr. Stimpson. 
The smallest specimen from Dakota agrees exactly with the Iowa ex- 
amples in being long, ovate; the others are considerably larger and 
with age seem to grow broader, more wedge-shaped. The following are 
the dimensions of the most Wwedge- shaped examples; length, 14™™; 
height, 10.5™™. 
Differs from any of the preceding species by the full globose higher 
shell, with more prominent and central beaks, and the shorter oviger. 
ESTHERIA BELFRAGEI Packard. 
Plate ITI, figs. 1, 2, 4,6; XXIV, fig. 1 
Estheria belfragei Packard, Amer. Journ. Sc., II, Aug., 1871. 
Hayden’s U. S. Geol. Surv. Terr. for 1873, 619, Pl. ILI, fig. 8, 1874. 
Shell (Fig. 11 in text) or carapace valves with the beak situated be- 
tween the anterior third and the middle of the shell; dorsal edge straight 
for a very short distance behind the beak, slightly serrate, bent rather 
suddenly downward at two-thirds of the distance 
from the beak to the posterior end, the end being 
very full and rounded; the anterior dorsal edge 
slopes down rapidly from the beak, and the an- 
terior end is fulland convex. Beak very full and 
prominent, more so than in any other species ex- 
cept H. jonesii, but they are not oblique. About 
twenty-four lines of growth, between which the ,, : 
1G. 11.—Estheria belfragei, 
shell is coarsely punctate; from 5-8 dots (when enlargedabout four times. Em: 
placed in a straight line) between the lines of ¢tton del. 
growth in central part of the shell; these punctures are reduced to a 
single row on the edge. In a piece taken from the edge of the shell and 
highly magnified (Plate XXIV, fig. 1) there are seen to be two rows of 
setee, one very short and thickset, the row of larger ones very long and 
slender arising at some distance from the edge of the shell. The pune- 
tiform markings are seen to be large with scattered masses of denser 
tissue than that inclosing them. Second antenne with 14 joints in the 
upper, and 15 joints in the lower ramus of the flagellum. In the two 
anterior pairs of legs of the male, the lower division of the flabellum is 
rather broad and short, while the gill is moderaten in size and rather 
short; the hands are rather small, of the general shape of H. mexicana, 
but the claw is a little shorter. There are along the back seventeen 
pairs of dorsal spines exclusive of those on the telson, which are fifteen 
in number (in H. mexicana they are much more numerous), and the mid- 
dle one is much larger than those near it. Caudal appendages longer 
and slenderer than in H. mexicana, and the terminal spine is longer and. 
slenderer. 
Length of shell, 7.5™™; height, 6"; transverse diameter, ‘+ 3.8"". 
Six specimens, Waco, Tex. > April (G. W. Belfrage). 
This fine species differs from Li. morsei, its nearest ally, in having a 
much shorter and higher shell with the larger beaks nearer the anterior 
end. 
