868 PALEONTOLOGY OF NEW YORK. 



Family JiETZTTD^. 



Rhtnchospira, Hall, 1859. Retzia, King, 1850. 



HoMCEOSPiRA, Hall, 1893. Uncinella, Waagen, 1883. 



Pttchospira, Hall, 1893. Eumetria, Hall, 1864. 



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



Parazyga, Hall, 1893. Hustedia, Hall, 1893. 



Faiult UNCITID^ Waaohn. 



Uncites, Defrance, 1825. 



Family MBRISTELLIDJR. Waaqbn. 



Mebista, Suess, 1851. Charionella, Billings, 1861. 



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

 DicAMARA, Hall, 1893. Goniocalia, Hall, 1861. 



Meristella, Hall, 1860. 



Family ATHTRID^ Waaqbn. 



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



Whitfieldia, Davidson, 1882. Actinoconchus, McCoy, 1844 



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



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



Sptrtgera, d'Orbigny, 1847. Kayseeia, Davidson, 1882. 



INCERTJE 8EDIS. 



EiCHWALDiA, Billings, 1858. Aulacorhynchus, Dittmar, 1871. 



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



