New and Little Known American Paleozot Ostracoda. Ln 
BOLLIA PUMILA, N. sp. 
Feely UES NG, U0: 
Valves oblong-subelliptical, the anterior end somewhat narrower 
than the posterior, and with the point of greatest extension near 
the antero-dorsal angle; from here the edge curves backward into 
the uniformly convex ventral portion; posterior end rounded, 
nearly vertical, forming an obtuse angle where it joins the dorsal 
margin; the latter is never quite straight, but protrudes more or 
less in the central third of its length. A narrow ridge runs nearly 
parallel with the free edges, the abruptness with which it rises 
above them varying slightly. The ends of the inner or horse-shoe 
shaped ridge characterizing the genus, are bulbous and project a 
little beyond the dorsal margin; the curved portion thin, generally 
a little oblique, and well separated from the marginal ridge. 
Sizes Heneth, o.86-mm.; height, o.52 mm. 
This species is smaller than usual in this genus. Its chief pecul- 
larity is the bulbous enlargement of the ends of the horse-shoe 
ridge. It is too clearly distinct from B. persulcata, Ulr., to require 
comparisons. 
Position and locality: Upper beds of the Cincinnati Group, 
near Weisburg, Ind., and other localities in Indiana and ‘Ohio 
where equivalent strata are exposed. 
DEPRANELLA, Nn. gen. 
Carapace small, averaging 2.5 mm. long by 1.5 mm. high; sub- 
elliptical in outline; dorsal border straight, terminating abruptly at 
each end; ventral border nearly straight or gently convex, round- 
ing almost evenly into the ends. 
Running nearly parallel with the posterior and ventral edges, 
a sharply-elevated sickle-shaped ridge, often produced spine-like 
beyond the postero-dorsal border. Dorsal slope with two or 
more strong tubercles or ridges. At the ventral edge the two 
valves meet equally. 
Type, D. CRASSINODA, N. sp. 
The nodes on the dorsal slope and the greater size of the species 
referred to this genus distinguishes them from /onesella. 
Of described species, I know of only one having the characters 
of Depranella. This is the Beyrichia richardsont, S. A. Miller, 
occurring in the upper beds of the Cincinnati Group. It has two 
