224 T^ULLETIN 53, UNITED STATES NATIONAL MUSEUM, 



24616. Dicellocephalus richmondensis Walcott. Cotj'pes. 



Middle Cambrian. New York Canyon, Eureka District, 

 Nevada. 

 Walcott, Mon. VIII, U. S. Geol. vSurv., 1884, p. 41, pi. 10, fig. 7. 

 = Ptychoparia richnionden.si.s. 



15447. Dicellocephalus wahsatchensis Hall and Whitfield. 



Cotype.s. 

 Middle Cambrian. Canyon above Calls Fort, Walisatch 

 Ra;nge, Utah. 



Hall and Whitfield, Rept. U. vS. Geol. Expl. 40th, Par. IV, I't. 

 II, 1877, p. 241, pi. I, fig. 35. 



= Olenoides wah.satchensis. 

 vSee Dicelloce])halus o^othicus. 



1025. Dicellomus nanus (Meek and Hayden). Cotypes. 



Upper Caml)rian. Central portions of Black Hills, South 

 Dakota. 



Walcott, Mon. XXXII, Pt. 11, U. vS. Geol. vSurv., 1899, p. 447, 

 pi. 60, figs. 3I), 3d. 



See Obolclla nana. 



35209. Dicellomus nanus ( Meek and Ha3'den). Plesiotypes. 



35210. Gallatin ( Upper Cambrian ). Gallatin Range, Yellowstone 



National Park, and Little Rocky Mountains, Montana. 



Walcott, Mon. XXXII, Pt. II, U. vS. Geol. vSurv., 1899. p. 447, pi. 

 60, figs. 3, 3a, 3c. 



See Obolella nana. 



3521 1. Dicellomus politus ( Hall ). Plesiotypes. 



Middle Cambrian. Wiscon.sin. 



Walcott, Mon. XXXII, Pt. II, T. S. Geol. vSurv., 1899, ]>. 446, pi. 

 60, figs. 4, 4a. 



158300. Dichocoenia alabamensis Vaughan. Holotype. 



Midway (Eocene). Prairie Creek, Alabama. 



Vaughan, Mon. XXXIX, T'. S. <U-ol. Surv., ujoo, p. 139, j)l. 15, 

 figs. 4-4C. 



35092. Dichocrinus inornatus Wachsnuith and vSpringer. 



Ple,siotype. 

 Kinderhook (Miss.). Quarry, Marshall County, Iowa. 



Grabau, Amer. Journ. Sci. (4), XVI, 1903, p. 297, figs. 9, 10 on 

 p. 298. 



43749. Dichotrypa elegans Ulrich. Cotypes. 



St. Louis (Mi.ss.). I\lizabethtown, Kentucky. 



ririch.Geol. Snrv. 111., VIII, 1890, p. 500, pi. 76. figs. 8, 8b, 8e, 8d. 



43387. Dichotrypa foliata Ulrich. Cotypes. 



Middle Devonian. Buffalo, Iowa. 



Ulrich, Geol, Surv. 111.. VIII, 1890, p. 499, ))1. 42, figs. 2-2g. 



