358 PALEONTOLOGY OF NEW YORK. 



FAMaT RETZIID^. 



Rhynchospira, Hall, 1859. Retzia, King, 1850. 



HoM(EOSPiRA, Hall, 1893. Uncinella, Waagen, 1883. 



Ptychospira, Hall, 1893. Eumetria, Hall, 1864. 



Trematospira, Hall, 1857. Acambona, White, 1862. 



Pabazyga, Hall, 1893. Hustedia, Hall, 1893. 



Family VNCITIDm, Waaobn. 



Uncites, Defrance, 1825. 



Family MERISTELLIBM, Waagen. 



Merista, Suess, 1851. Charionella, Billings, 1861. 



Camarium, Hall, 1859. (?) Pentagonia, Cozzens, 1846. 

 DicAMARA, Hall, 1893. Gmiocalia, Hall, 1861. 



Meristella, Hall, 1860. 



Family ATHTRID^. Waagen. 



Meristina, Hall, 1867. Cliothyris, King, 1850. 



Whitfieldia, Davidson, 1882. Actinoconchus, McCoy, 1844 



Glassina, Hall, 1893. Seminula, McCoy, 1844. 



Athyris, McCoy, 1844. Spirigerella, Waagen, 1883. 



Sptrigera, d'Orbigny, 1847. Kayseria, Davidson, 1882. 



INCERTJE SEDTS. 



EicHWALDiA, Billings, 1858. Aulacorhynchus, Dittmar, 1871. 



Didyonella, Hall, 1867. Jsogramma, Meek and Worthen,1873. 



