298 BULLETIN 92, UNITED STATES NATIONAL MUSEUM. 



Ctenobolbina clliata Continued. 



Ctenobolbina ciliata Ulrich, Jour. Cincinnati Soc. Nat. Hist., 13, 1890, p. 108, 

 pi. 7, figs, la, b Ruedemann, Bull. New York State Mus., 42, Pal., 8, 1901, 

 p. 575, pi. 2, figs. 8, 9. Ulrich and Bassler, Proc. U. S. Nat. Mus., 35, 1908, p. 

 282, fig. 7, pi. 40, figs. 1, 2. Grabau and Shimer, N. A. Index Fossils, 2, 

 1910, p. 353, fig. 1660, t, t'. Bassler, Zittel-Eastman Textb. Pal., 1913, p. 

 738, fig. 1425e. 



Beyrichia tumifrons Hall, Desc. n. sp. Fossils, Cincinnati, Ohio, 1871, p. 7, pi. 

 4, fig. 11; 24th Rep. New York State Mus. Nat. Hist., 1872, p. 231, pi. 8, 

 fig. 11. Miller, Cincinnati Quart. Jour. Sci., 1, 1874, p. 119. Hall and Whit- 

 field, Geol. Surv. Ohio, Pal., 2, 1875, p. 102, pi. 4, fig. 8. 



Eden: Cincinnati, Ohio, and vicinity. 



Trenton (Snake Hill): Green Island, Albany County, New York. 



Plesiotypes.Ca.t. No. 41492, U.S.N.M. 



Ctenobolbina ciliata cornuta Ruedemann. 



Ctenobolbina ciliata cornuta Ruedemann, Bull. New York State Mus., 42, Pal., 



1901, p. 575, pi. 2, figs. 5-7. 

 Trenton (Snake Hill): Mechanicsville, Saratoga County, and Green Island, 



Albany County, New York. 



CTENOBOLBINA CILIATA var. CURTA Ulrich. See Ctenobolbina curta. 

 CTENOBOLBINA CILIATA var. EMACIATA Ulrich. See Ctenobolbina emaciata. 

 CTENOBOLBINA CILIATA var. HAMMELLI Cumings. See Ctenobolbina hammelli. 



Ctenobolbina crassa (Ulrich). 



Jonesella crassa Ulrich, Jour. Cincinnati Soc. Nat. Hist., 13, 1890, p. 123, pi. 7, 



figs, lla-c. 

 Ctenobolbina crassa Ulrich, Geol. Minnesota, 3, pt. 2, 1894, p. 675, pi. 44, figs. 



12-16. Ulrich and Bassler, Proc. U. S. Nat. Mus., 35, 1908, pi. 40, figs. 15, 16. 

 Black River (Decorah): Minneapolis, Cannon Falls, etc., Minnesota. 

 Cotypes.Cat. No. 41497, U.S.N.M. 



Ctenobolbina curta (Ulrich). 



Ctenobolbina ciliata var. curta Ulrich, Jour. Cincinnati Soc. Nat. Hist., 13, 1890, 



p. 109, pi. 7, fig. 2. 



Ctenobolbina curta Ulrich and Bassler, Proc. U. S. Nat. Mus., 35, 1908, p. 310. 

 Eden (McMicken): Cincinnati, Ohio, and vicinity. 



Ctenobolbina denticula Ulrich and Bassler. 



Ctenobolbina? denticula Ulrich and Bassler, Maryland Geol. Surv., Low. Dev., 



1913, p. 524, pi. 96, figs. 6-9. 

 Helderbergian (Keyser): Cumberland, Maryland. 

 Holotype.Czt. No. 43307, U.S.N.M. 



Ctenobolbina? dubia Ulrich and Bassler. 



Ctenobolbina? dubia Ulrich and Bassler, Maryland Geol. Surv., Low. Dev., 1913, 



p. 525, pi. 96, figs. 10-12. 



Helderbergian (Keyser): Cumberland, Maryland. 

 Holotype.Gsit. No. 53277, U.S.N.M. 



Ctenobolbina duryi (Miller). 



Beyrichia duryi Miller, Cincinnati Quart. Jour. Sci., 1, 1874, p. 232, figs. 24, 25. 



Miller, N. A. Geol. Pal., 1889, p. 534, figs. 976, 977. 



Ctenobolbina duryi Ulrich, Jour. Cincinnati Soc. Nat. Hist., 13, 1890, p. 108. 

 Maysville (McMillan): Cincinnati, Ohio, and vicinity. 



