New American Paleozoic Ostracoda. 



185 



Though falling readily enough within the limits of the 

 genus Kirkbya, as now understood, none of the species here- 

 tofore described seem to be enough like K. cymbula to require 

 comparisons. The next described species, K. ger?nana, is 

 nearer than any other known to me. 



Formation and Locality. — From the Devonian bryozoa bed, 

 Falls of the Ohio. 



Kirkbya germana, n. sp. 

 Plate VIII, Figs. 19-22. 



Size: Right valve: length, 1.10 mm.; hight, 0.60 mm.; 

 thickness, 0.23 mm. Left valve: length, 1.20 mm.; hight, 

 0.60 mm. ; thickness, 0.25 mm. 



This species, evidently, is closely related to K. cymbula, with 

 which it is also associated. On close comparison we find that 

 the outline is not exactly the same, the anterior extremity of 

 the hinge line being less prominent and angular. The mar- 

 ginal rim is set a little further from the edge, and in the 

 anterior part does not follow the outline of the valve, but 

 bends downward from above, the junction with the lower 

 portion forming an obtuse angle a little above the midnight. 

 The space included within the marginal rim also is convex, 

 instead of flat, while the longitudinally arranged ribs and 

 pits are much larger, and, therefore, fewer, there being but 

 six where K. cymbula has ten or eleven. 



Formation and Locality, — Same as the preceding. 



7 



