328 BULLETIN rV,U UNITED STATES NATIONAL MUSEUM. 



23078. Hypsipleura gregaria Stanton. Cotypes. 



Knoxville (Lower Cret.). Five miles north of Paskenta, 

 California. 



Stanton, Bull. No. 133, T'. S. Geol. Surv., 1895 (Feb., 1S96), 

 p. 70, pi. 13, figs. I, 2. 



23077. Hypsipleura ? occidentalis vStanton. Cotypes. 



Knoxville (Lower Cret.;. Three miles northwest of Pas- 

 kenta, California. 



Stanton, Bull. No. 133, U. S. Geol. Surv., 1895 (Feb., 1896), 

 p. 70, pi. 13, figs. 3, 4. 



43674. Idiotrypa parasitica Ulrich. Holotype and figured sections. 

 Osgood (Sil.). O-sgood, Indiana. 



Ulrich, Journ. Cincinnati Soc. Nat. Hist., VI, 1883, p. 275, pi. 13, 

 figs. I, ic. 



8645. Idonearca depressa White. Holotype. 



Colorado (^Cret. ). East bank Rio Puerco, six miles below 

 Casa Salazan, New Mexico. 



White, Rept. U. S. Geogr. Surv. W. looth Merid., IV, Pt. I, 1876, 

 p. 1S3, pi. ]8, figs. 13a, b. 



= Trigonarca depres.sa. 



12257. Idonearca shumardi (Meek and Hayden). Plesiotypes. 



Fox Hills (Cret.). Cheyenne River, near Old Woman 

 Fork, Black Hills, Wyoming. 



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

 p. 405, pi. II, figs. 8-11. 



^Cucullaea (Idonearca) shumardi. 



See Area (Cucullaea) shumardi. 



24570. Illsenurus eurekensis Walcott. Cotypes. 



Lower Pogonip ( Camb. ). Ridge east of Hambtirg Ridge, 

 Eureka District, Nevada. 

 Walcott, Mon. VIII, U. S. Geol. Surv., 1884, p. 97, pi. 12, figs. 4, 4a. 



23865. Illsenurus ? ida Walcott. Cotypes. 



Upper Cambrian. Morgans Creek, Burnett County, Texas. 



Walcott, Proc. U. S. Nat. Mus., XIII, 1890, p. 277, pi. 20, fig. 6. 



112377. Ilyanassa (Paranassa) arata (Say). Plesiotype. 



Pliocene. Waccamaw River, South Carolina. 



Dall, Trans. Wagner Free Inst. Sci. Phila., HI, Pt. II, 1892, 

 p. 238, pi. 20, fig. 15. 



87751. Ilyanassa (Paranassa) isogramma Dall. Holotype. 



Miocene. Wilmington, North Carolina. 



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

 p. 239, pi. 20, fig. 16. 



124945. Ilyanassa fporcina var.) schizopyga Dall. Holotype. 



Miocene. Cape Fear River, North Carolina. 



Dall, Trans. Wagner Free Inst. Sci. Phila., Ill, Pt. II, 1892, p. 238. 



