480 BULLETIN 53, UNITED STATES NATIONAL MDSEUM. 



38850. Palaeocaris typus Meek and Worthen. Plesiotype. 



Upper Coal Measures. Mazou Creek, Grundy County, 

 Illinois. 

 Packard, Mem. Nat. Acad. Sci., IV, 1886, p. 129, pi. 7, fig. 2. 



24584. Palaeochorda prima Whitfield. Cotypes. 



Upper Cambrian. Head of Redwater Valley, Black Hills, 

 South Dakota. 



Whitfield, Rept. Geol. and Resources Black Hills Dakota, 1880, 

 p. 331, pi. 1, fig. 2. 



24334. Palceoneilo sulcata Hartt and 'Rathbun. Cotype. 



Middle Devonian. Erere, Para, Brazil. 



Hartt and Rathbun, Ann. Lyceum Nat. Hist. N. Y., XI, 1875, p. 

 124. 



24582. Palaeophycus occidentalis Whitfield. Cotypes. 



Upper Cambrian. Head of Redwater Valley, Black Hills, 

 South Dakota. 



Whitfield, Rept. Geol. and Resources Black Hills Dakota, 1880, 

 p. 332, pi. 1, fig. 3. 



38002. Palenarthrus impressus Scudder. Holotype. 



Upper Coal Measures. Mazon Creek, Grundy County, 

 Illinois. 



Scudder, Mem. Boston Soc. Nat. Hist., IV, 1890, p. 422, pi. 38, 

 fig. 4; Foss. Insects N. America, I, 1890, p. 398, pi. 30, fig. 4. 



8081. Paliurus pentangulatus White. Holotype. 



Fox Hills (Cret.). Monument Creek, near Colorado 

 Springs, Colorado. 



White, Eleventh Ann. Rept. U. S. Geol. Surv.Terr., 1879, p. 302, 

 pi. 4. figs. 4a, 4b. 



13317. Pallium estrellanum Conrad. Cotype. 



Miocene. Estrella, California. 



Conrad, Rept. Expl. and Surveys R. R. Miss. Riv. to Pacific 

 Ocean, VII, 1857, p. 191. — Dall, Trans. Wagner Free Inst. Sci. 

 Phila., Ill, Pt. IV, 1S98, p. 701. 



= Pecten (Lyropecten) hermanni. 

 See Pecten hermanni. 



25478. Paltorhynchus ? bisulcatus Scudder. Cotype. 



Older Tertiary. Roan Mountains, western Colorado. 



Scudder, Mon. XXI, I". S. Geol. Surv., 1893, p. 19, pi. 8, fig. 3. 



162542. Paludestrina curta Arnold. Holotype. 



Pleistocene. San Pedro, California. 



Arnold, Mem. Calif. Acad. Sci., Ill, 1903, p. 305, pi. 8, fig. 2. 



162541. Paludestrina stokesi Arnold. Holotype. 



Pleistocene. San Pedro, California. 



Arnold, Mem. Calif. Acad. Sci., Ill, 1903, p. 306, pi. 8, fig. 3. 



