New and Little Known American Paleozoic Ostracoda. 199 
region of the carapace in that genus finds no representation in 
Barychilina. A similar, but coarser longitudinal striation of the 
valves is found in certain subcarboniferous species that are referred, 
perhaps erroneously, to Azrbya. The XK. costata, McCoy, illus- 
trated on plate 18, figs. 2a, 26, is one of these. It would pass 
very well as a Barychilina and, if it could be shown to have 
unequal valves, I would not hesitate to place it there. 
Of other species that may belong to this genus I will mention 
Entomis rhomboidea and Primitia (?) wolcott, both lately described 
by Prof. Jones from the Hamilton group of New York and Canada. 
BARYCHILINA PUNCTO-STRIATA, Nn. Sp. 
eae eT Fes. 1 a, 0, 6, 0, ¢, 2.a,0, 6, and, var. curta, 3 a,b, ¢. 
<2, left: valve, fe Te SS wk OG Oo & O37 
66 3 right cé 6é 1.47 6é 6é 1.05 ¢ (73 0.35 (a3 
fe I, complete example, length, 1.85 mm.; height, 1.15 mm.; thickness, 0.94 mm. 
Sizer 
Right valve, subrhomboidal, with the angles rounded off; out- 
line produced in the postero-dorsal and antero-ventral regions; 
anterior portion of dorsal edge thickened and reflexed; the slit- 
like umbilical pit situated a short distance behind the center of the 
antero-dorsal fourth. Left valve more nearly oval, and narrower 
in front, with the edges, particularly the upper and lower, thick- 
ened and incurved to allow the overlap of the right valve. Edges 
of both valves smooth, the rest of the surface covered with dis- 
tinct, flexuous longitudinal striz; in each of the furrows between 
the striz a row of small punctures. 
Figs. 3 @, 4, c, are outline representations of a right valve of 
Var. CURTA, Nn. var. 
This differs from the typical form in being shorter and not 
so thick. 
Position and locality: Devonian Bryozoa bed, Falls of the Ohio. 
BARYCHILINA PULCHELLA, N. sp. 
Flate XII, Figs. 4a, b, 6, a. 
Size: Length, 1.03 mm.; height, 0.68 mm.; thickness, 0.70 mm. 
Carapace short, ventricose, and a little the highest in the poste- 
rior half. Right valve subrhomboidal, angles rounded, outline 
