670 BrLLETlN 53, UNITED STATES NATIONAL MUSEUM. 



134T0. Trochus (Oxystele) euryostomus White. Cot^-pes. 



Cliico ( Cret. ). Todos vSaiilos Bay, California. 



White, Rail. No. 22, U. vS. C.col. Surv., 1.SS5, ]>. ;2, ])1. 5, fisrs. 9-1 1. 



20120. Trochus ( Anadema ) gemiferus White. Holotype. 



Chico (Cret.). Near Peiice'.s ranch, Butte County, Cali- 

 fornia. 



Wliile, Riill. No. 51, r. vS. (irol. Surv., 18S9, p. 17, pi. 4, figs. 8, 9. 



246S. Trochus humilis Conrad. Holotype. 



Miocene. St. Mary.s River, Maryland. 



Conrad, Jourii. Acad. Nat. Sci. Phila., VI, iS^o, p. 219, ])!. 9, 

 fig. 5.— Dall, Trans. Wagner Free Inst. Sci. Phila., Ill, Pt. II, 

 1892, p. 405. 



= Calliostoma ( luitrochu.s ) hmnilis. 



115617. Trochus plicomphalus Ouppy. Holotype. 



Pliocene. Matura, Trinidad, Briti.sh We.st Indies. 



Guppy, Geol. Mag., London, Dec. II, I, 1874, p. 435, pi. 18, fig. 17. 



1498S. Trochus ( Palaeotrochus ) praecursor Clarke. Holotype. 



Naples (Dev.). Naples, New York. 



Clarke, Bull. No. 16, U. S. Geol. Surv., 1885, p. 55, pi. 3, figs. 6-9. 

 = Palaeotrochus prcecursor. 



23S47. Trochus ? saratogensis Walcott. Cotypes. 



Upper Cambrian. P\nir miles west of Saratoga Springs, 

 New York. 

 Walcott, Proc. U. S. Nat. Mus., XIII, 1S90, p. 268, pi. 20, fig. 3. 



162545. Trophon ( Boreotrophon ) cerritensis Arnold. Holotype. 



Pleistocene. Deadman Island, off San Pedro, California. 

 Arnold, Mem. Calif. Acail. Sci., Ill, 1903, p. 249, pi. 6, fig. 6. 



20122. Trophon condoni White. Cotype. 



Chico ( Cret. ). Eighteen miles ea.st of Redding, California. 



White, Hull. No. 51, V. S. Geol. Surv., 1889, p. 21, pi. 3, figs. 4, 5. 



1 13273. Trophon (Aspella) engonatus Dall. Cotypes. 



Pliocene. Shell Creek, De Soto County, P'lorida. 



Dall, Trans. Wagner Free Inst. Sci. Phila., Ill, Pt. II, 1892, p. 243, 

 pi. T3, fig. 6a. 



162546. Trophon ( Boreotrophon) stuarti praecursor Arnold. 



Holotype. 

 Pliocene. Deadman Island, off San Pedro, California. 

 Arnold, Mem. Calif. Acad. Sci., Ill, 1903, p. 253, pi. 6, fig. 5. 



24340. Tropidocyclus gilletianus ( Hartt and Rathbun). 



Ple.siotypes. 

 -Middle Devonian. lirere, Brazil. 



Clarke, Archivos do Mus. Rio de Janeiro, X, 1899, p. 40, pi. 3, 

 figs. 10, II. 



