232 BULLETIN 92, UNITED STATES NATIONAL MUSEUM. 



Clidophorus brazilianus Clarke. 



Clidophorus brazilianus Clarke, Archives Mus. Nac. Rio de Janeiro, 10, author's 



Engl. ed., 1900, p. 18, pi. 2, figs. 17-19. 

 Silurian: Rio Trombetas, Brazil. 



Clidophorus chicagoensis (Miller). 



Clidophorus chicagoensis Miller, Jour. Cincinnati Soc. Nat. Hist., 3, 1881, p. 



314, pi. 8, figs. 2, 2a. 

 Niagaran (Racine): Bridgeport and Cicero, Illinois. 



Clidophorus concentricus Hall. 



Clidophorus concentricus Hall, Canadian Nat. Geol., 5, 1860, p. 149, fig. 7. 



Dawson, Acadian Geol., Suppl. Chap., 1860, p. 68, fig. 53; 2d ed., 1868, p. 600, 



fig. 204. 

 Silurian: Arisaig, Nova Scotia. 



Clidophorus consuetus Ulrich. 



Clidophorus consuetus Ulrich, 19th Ann. Rep. Geol. and Nat. Hist. Surv. Minne- 

 sota, 1892, p. 223, fig. 9; Geol. Minnesota, 3, pt. 2, 1894, p. 606, pi. 37, figs. 

 32, 33. 



Trenton (Prosser) : t Near Wykoff , Minnesota. 



Holotype.C&t. No. 46110, U.S.N.M. 



Clidophorus cuneatus Hall. 



Clidophorus cuneatus Hall, Canadian Nat. Geol., 5, 1860, p. 148. Dawson, Aca- 

 dian Geol., 2d ed., 1868, p. 600. 

 Silurian: Arisaig, Nova Scotia. 



Clidophorus ellipticus (Ulrich). 



Cleidophorus ellipticus Ulrich, Jour. Cincinnati Soc. Nat. Hist., 2, 1879, p. 25, 



pi. 7, fig. 22. 



Eden (Economy): Covington, Kentucky. 

 Holotype.Czt. No. 46111, U.S.N.M. 



Clidophorus elongatus Hall. 



Clidophorus elongatus Hall, Canadian Nat. Geol., 5, 1860, p. 150, fig. 9. Dawson, 

 Acadian Geol., Suppl. Chap., 1860, p. 68, fig. 55; 2d ed., 1868, p. 601, fig. 206. 

 Silurian: Arisaig, Nova Scotia. 



Clidophorus erectus Hall. 



Clidophorus erectus Hall, Canadian Nat. Geol., 5, 1860, p. 149, fig. 8. Dawson, 

 Acadian Geol., Suppl. Chap., 1860, p. 68, fig. 54; 2d. ed., 1868, p. 600, fig. 

 295. 



Silurian:. Arisaig, Nova Scotia. 



Clidophorus faberi Miller. 



Clidophorus faberi Miller, N. A. Geol. Pal., 1889, p. 471, fig. 795. 

 Richmond: Near Versailles, Indiana; Butler County, Ohio. 



Clidophorus fabula (Hall). 



Clidophorus (Nucula) fabula Hall, Amer. Jour. Sci. Arts, 43, 1845, p. 295. 

 Clidophorus (Nuculites?) fabula Meek, Geol. Surv. Ohio, Pal., 1, 1873, p. 138, pi. 



11, figs. lOa, b. 



Cleidophorus fabula Miller, Cincinnati Quart. Jour. Sci., 1, 1874, p. 222. 

 Clidophorus fabula Miller, N. A. Geol. Pal., 1889, p. 471, fig. 796. Cumings, 32d 



Ann. Rep. Dep. Geol. Nat. Res. Indiana, 3908, p. 996, pi. 44, figs. 6, 6a. 

 Eden Richmond: Cincinnati, etc., Ohio; Indiana; Kentucky; Tennessee. 

 Observation. C. fabula is possibly only a dwarfed form of C. neglectus. 



