672 BULLETIN 92, UNITED STATES NATIONAL MUSEUM. 



IsocHiLiNA AMiANA Ulrich. See Isochilia gregaria. 



IsocHiLiNA AMIANA var. IN8IQNI8 Uliich. See iBochilina cristata. 



Isochlllna aniii Jones. 



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



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

 Trenton: Jyorette, Quebec. 



Isochilina ainpla Ub-ich. 



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



pi. 11, figs. 8a-d. 

 Trenton (Catbeys): Nashville, Tenncdsee. 

 Cotypes.—C&t. No. 41291, U.S.N.M. 



Isuchillna 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. 

 Plesiotype. — Cat. No. 43155, U.S.N.M. (Holotype of I. kentuckiensis.) 



Isochilina armata pygmsea Ruedemann. 



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



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

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



Isochilina? cla^lgera (Jones). 



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



65, pi. 11, fig. 7. 

 Isochilina? cla\dgera Ulrich and Batsler, Proc. U. S. Nat. Mus., 35, 1908, p. 282, 



fig. 3. 

 Stones River (Pamelia): Aylmcr, Quebec. 

 Plesiotype.— <iait. No. 41653, U.S.N.M. 



I^ocliIIIna clavigera clavifracta (Jones). 



Beyricliia 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 (WTiitfield). 



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



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

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



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

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



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

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



Ottawa, Ontario. 

 Plesiotype.— C'&t. No. 41290, U.S.N.M. (Holotj'pe 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. 



