672 BULLETIN 92, UNITED STATES NATIONAL MUSEUM. 



ISOCHILINA AMIANA Ulrich. See IsocMlia gregaria. 



ISOCHILINA AMIANA var. iNSiGNis Ulrich. See Isochilina cristata. 



Isochillna amii Jones. 



Isochilina Amii Jones, Cont. Micro-Pal., Geol. Surv. Canada, pt. 3, 1891, p. 68, 



pi. 10, figs. 14a, -b. 

 Trenton: Lorette, Quebec. 



Isochilina ampla Ulrich. 



Isochilina ampla Ulrich, Jour. Cincinnati Soc. Nat. Hist., 13, pt. 1, 1891, p. 179, 



pi. 11, figs. 8a-d. 



Trenton (Catheys) : Nashville, Tennessee. 

 Cotypes. Cat. No. 41291, U.S.N.M. 



Isochilina armata (Walcott). 



Leperditia (Isochilina) armata Walcott, 35th Rep. New York State Mus. Nat. 



Hist., 1884, p. 213, pi. 17, fig. 10 (extract, 1883, p. 7). 

 Isochilina kentuckiensis Ulrich, Jour. Cincinnati Soc. Nat. Hist., 13, 1891, p. 



179, pi. 11, figs, lla-lld. 

 Black River (Lowville): Russia, Herkimer County, New York; High Bridge and 



Frankfort, Kentucky. 

 PlesiotypeC&t. No. 43155, U.S.N.M. (Holotype of I. kentuckiensis.) 



Isochilina armata pygmaea Ruedemann. 



Isochilina armata pygmaea Ruedemann, Bull. New York State Mus., 49, 1901, p. 



72, pi. 7, figs. 19-25. 

 Mohawkian (Rysedorph): Rysedorph Hill, Rensselaer County, New York. 



Isochilina? clavigera (Jones). 



Beyrichia clavigera Jones, Geol. Surv. Canada, Cont. Micro-Pal., pt. 3, 1891, p. 



65, pi. 11, fig. 7. 

 Isochilina? clavigera Ulrich and Baesler, Proc. U. S. Nat. Mus., 35, 1908, p. 282, 



fig. 3. 



Stones River (Pamelia) : Aylmer, Quebec. 

 Plesiotype.G&t. No. 41653, U.S.N.M. 



Isochilina clayigera clavifracta (Jones). 



Beyrichia clavigera clavifracta Jones, Geol. Surv. Canada, Cont. Micro-Pal., pt. 



3', 1891, p. 65, pi. 11, fig. 8. 

 Stones River (Pamelia): Aylmer, Quebec. 



Isochilina cristata (Whitfield). 



Primitia? cristata Whitfield, Bull. Amer. Mus. Nat. Hist., 2, 1889, p. 59, pi. 13, 



figs. 1, 2. Lesley, Geol. Surv. Pennsylvania Rep. P4, 1889, p. 743, figs. 

 Isochilina cristata Jones, Quart. Jour. Geol. Soc. London, 46, 1890, p. 23, pi. 1, 



fig. 8. Seely, Vermont State Geol., Rep., 7, 1910, pi. 61, fig. 15. 

 Isochilina amiana var. insignis Ulrich, Jour. Cincinnati Soc. Nat. Histf; 13, pt. 1, 



1891, p. 181, pi. 11, fig. 13. 

 Canadian (Beekmantown): Cave Island, Ball's 'Bay, Lake Champlain; drift at 



Ottawa, Ontario. 

 Plesiotype. Cat. No. 41290, U.S.N.M. (Holotype of I. amiana insignis). 



ISOCHILINA CYLINDRICA Grabau. See Leperditia cylindrica. 



Isochilina gracilis (Jones). 



Leperditia (Isochilina) gracilis Jones, Ann. Mag. Nat. Hist. (3), 1, 1858, p. 248, 

 pi. 10, fig. 2; Geol. Surv. Canada, dec. 13, 1858, p. 98, pi. 11, fig. 15. 



