New and Little Known American Paleozoic Ostracoda. 11g 
crowned with three smalleminences. This ridge extends from the 
hinge line a little more than half the height of the valve toward the’ 
postero-ventral border. Surface smooth. 
Dimensions of a complete carapace of the ordinary size: Great- 
est length, 2.55 mm.; greatest height, 1.6 mm.; greatest thickness 
of body, 0.6 mm.; thickness from summit to summit of marginal 
ridges near postero-ventral angle, 1.0 mm. 
This fine species is represented by a number of specimens 
obtained from the Birdseye limestone at High Bridge, Ky. The 
next described is probably only a more tumid variety, and occurs 
at the same locality, but is from beds 275 feet lower, supposed to 
represent the Chazy limestone of New York. 
DEPRANELLA NITIDA, Nn. Sp. OF Var. 
Bane VILL Figs. 20, 30. 
This species or variety of D. crassinoda differs from the typical 
form of that species principally in the plumpness of the valves and 
the great reduction in prominence and size of the nodes and 
ridges. The valves are so much deeper that we are forced to 
believe that there was some corresponding difference in the ani- 
mals they contained. It may be noticed further that the carapace 
is shorter and not so high, and that the ventral edge is straighter 
than in the form called D. crassinoda. A well-preserved example 
has the entire surface between the nodes covered with an irregular 
delicate reticulation. 
Position and locality: Chazy limestone, bottom of Kentucky 
River gorge at High Bridge, Ky. 
DEPRANELLA MACER, N.. sp. 
Plate VITL, Figs. 4a, b, c. 
This is another form that should perhaps be regarded as only a 
variety of D. crasstnoda. However, comparison of the figures will 
show at once that it marksa sufficiently striking departure from the 
typical form of that species to deserve description and naming. 
Its characters are briefly as follows: Valves subquadrate, about 
2.0 mm. long and 1.25 mm. high, with the body very thin and 
shallow, the thickness of the entire carapace at a point near the 
