OSTRACODA. 



Family LEPERDITIDiE. 

 Genus LEPERDITIA, Rouault. 1851. 



Leper ditia ITudsofiica, Hall. 1859. 

 Palaeontology of New York, vol. iii, p. 375. 

 Quarterly Journal of the Geological Society, vol. xlvi, pi. 1, figs. 5, 

 a, b, c. 



Lower Helderberg group (Shaly limestone). Becraft's Mountain, 



N. Y. 



Leperditia alta, Conrad (sp.). 1843. 



In Vanuxem's Report on the Third Geological District of New York, p. 112. 



Quarterly Journal of the Geological Society, vol. xlvi, pi. 1, figs. 6, 



a, b. 



Lower Helderberg group (Tentaculite limestone). Herkimer county, 



N. Y. 



Genus BEYBICHIA, McCoy. 1844. 



Beyrichia trisulcata, Hall. 1859. 



Palaeontology of New York, vol. iii, p. 381. 



Quarterly Journal of the Geological Society, vol. xlvi, pi. 1, fig. 2. 



Lower Helderberg group (Tentaculite limestone). Herkimer county, 



^N. Y. J. Gebhard purchase. 



Beyrichia granulata, Hall. 1859. 

 Palaeontology of New York, vol. iii, p. 377. 

 Quarterly Journal of the Geological Society, vol. xlvi, pi. i, fig. 3. 

 Lower Helderberg group (Pentamerus limestone). Schoharie county, 

 ~N. Y. . J. Gebhard purchase. 



Beyrichia oculina, Hall. 1859. 

 Palaeontology of New York, vol. iii, p. 378. 

 Quarterly Journal of the Geological Society, vol. xlvi, pi. 1, fig. 4. 

 Lower Helderberg group (Pentamerus limestone). Schoharie county, 

 ^N. Y. J. Gebhard purchase. 



1891. ±S 



