New and Little Known American Paleozoic Ostracoda. 185 
which Beyrichiella, Jones and Kirkby, has been established, and I 
do not doubt that with more material and the new forms that are 
being continually brought to light, the present difficulty of picking 
out the really diagnostic characters will gradually be overcome. 
Provisionally, I propose to place two species as Haliella, one 
m@ecembead in Part I of this paper (p. 136, pl. VIII, fig. 6) as 
Primitia (?) sculpitlis, the second the form next to be described. Of 
other species I would suggest that Primitia seminulum, Jones and 
Holl, may belong here. Perhaps also Bollia (?) auricularts, J., of 
which Prof. Jones writes in a letter to me, ‘‘it is not a good Bolha. 
Your. sculptiles is nearer to it than any other known to me.”’ 
As to the relations of Haliella, I should say in the first place 
that they are with Primitia on the one hand and Ctenoboltina on 
the other, differing from the latter in this, that the posterior lobe is 
not bulbous. 
HALLIELLA RETIFERA, MSD: 
TIHOUGV A 1105.) 5. GOs. 0, e, 
| Right valve; length, 1.38 mm.; height, 0.95 mm.; thickness, 0.5. 
Left valve ; x Mei7aNe 10 ae, [OXO Jets a 0.52: 
Valves slightly oblique, short, subovate, hinge-line straight, 
cardinal angles obtuse; ends slightly unequal, the anterior most 
prominent in the upper half, the posterior in the lower. <A 
depressed, concave, smooth marginal rim, widest in the postero- 
dorsal region. Sulcus oblique, sharply impressed, situated behind 
the center, extending from the dorsal edge about one-third across 
the valve. Surface rising gradually in passing around the sulcus 
from the narrow upper portion of the posterior lobe to the point of 
greatest convexity in the anterior half of the valves. The broad 
dorsal end of the ventricose anterior lobe often divided by a faint 
mesial impression. Surface of lobes rather coarsely reticulated. 
Contact edges of valves bevelled; hinge thick, apparently with a 
small anterior tooth. (See fig. 5.) 
Several reticulated species are associated with this, but as 
they are all quite distinct in other respects, they are not likely to 
be confounded. 
Position and locality: Devonian Bryozoa bed, Falls of the Ohio. 
Size: 
