30 BULLETIN 92, UNITED STATES NATIONAL MUSEUM. 



Ambonyehia bellistriata Hall. 



Ambonychia bellistriata Hall, Pal. New York, 1, 1847, p. 163, pi. 36, figs. 4a-d. 



Rogers, Geol. Pennsylvania, 2, pt. 2, 1858, p. 819, fig. 605. Zittel, Handb. 



Pal., 2, Munich, 1881, p. 35, fig. 42a. Lesley, Geol. Surv. Pennsylvania, 



Rep., P. 4, 1889, p. 22, fig. Ulrich, Geol. Minnesota, 3, pt. 2, 1894, p. 492, 



pi. 35, figs. 1 and 2. Grabau and Shimer, N. A. Index Fossils, 1, 1909, p. 430, 



fig. 561a, b. 

 Posidonomya bellistriata Emmons, Amer. Geology, 1, pt. 2, 1855, p. 176, pi. 13, 



figs. 5, 6. 

 Trenton: Middleville and Trenton Falls, New York; near Wykoff, Minnesota 



(Prosser). 

 Plesiotype.-CaL No. 46084, U.S.N.M. 



AMBONYCHIA BELLISTRIATA Miller. See Byssonychia vera. 



AMBONYCHIA CARINATA Hall. See Byssonychia carinata. 



AMBONYCHIA (MEGAPTERA) CASEI Meek and Worthen. See Opisthoptera casei. 



AMBONYCHIA (MEGAPTERA) CASEI? Meek. See Opisthoptera fissicosta. 



AMBONYCHIA CINCINNATIENSIS Miller and Faber. See Byesonychia vera. 



AMBONYCHIA COSTATA James. See Anomalodonta costata. 



Ambonychia? curvata Raymond. 



Ambonychia? curvata Raymond, Amer. Jour. Sci., 20, 1905, p. 373. 

 Chazyan (Day Point, Crown Point): Chazy, Valcour and Sloop Islands, New 

 York. 



AMBONYCHIA E RECTA Hall. See Olionychia erecta. 

 AMBONYCHIA EXCAVATA Miller. See Clionychia excavata. 



Ambonychia illinoisensis Worthen. 



Ambonychia Illinoisensis Worthen, Geol. Surv. Illinois, 6, 1875, p. 495, pi. 23, 



figs. 4a-b. 

 Richmond (Maquoketa): Savannah County, Illinois. 



AMBONYCHIA INTERMEDIA Meek and Worthen. See Byssonychia intermedia. 

 AMBONYCHIA JAMESI Miller. See Allonychia jamesi. 

 AMBONYCHIA LAMELLOSA of authors. See Clionychia lamellosa. 



AMBONYCHIA MAXIMA Safford. 



Ambonychia maxima Safford, Geol. Tennessee, 1869, p. 287 (not defined). 

 Middle Nashville: Central Tennessee. 



AMBONYCHIA MYTILOIDES Hall. See Clionychia mytiloides. 

 AMBONYCHIA NEGLECTA McChesney. See Amphico?lia neglecta. 

 AMBONYCHIA NITIDA Billings. See Mytilarca nitida. 

 AMBONYCHIA OBESA Miller. See Byssonychia obesa. 

 AMBONYCHIA OBTUSA Hall. See Cyrtodonta obtusa, 



Ambonychia orbicularis (Emmons). 



Pterinea orbicularis Emmons, Nat. Hist. New York, Geol., 2, 1842, pp. 395, 397, 

 fig. 3. Owen, Amer. Jour. Sci. and Arts, 47, 1844, pp. 368, 369, fig. 3. 



