328 BULLETIN 53, UNITED STATES NATIONAL MUSEUM. 



23078. Hypsipleura gregaria Stanton. Cotypes. 



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

 California. 



Stanton, Bull. No. 133, U. S. Geol. Sun-., 1S95 (Feb., 1896), 

 p. 70, pi. 13, figs. 1, 2. 



23077. Hypsipleura ? occidentalis Stanton. 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.). Osgood, Indiana. 



Ulrich, Journ. Cincinnati Soc. Nat. Hist., VI, 18S3, p. 275, pi. 13, 

 figs. 1, 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. 100th Merid., IV, Pt. I, 1876, 

 p. 183, pi. 18, figs. 13a, b. 



= Trigonarca depressa. 



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. 11, figs. 8-1 1. 



= Cucullaea (Idonearca) shumardi. 



See Area (Cucullaea) shumardi. 



24570. Illaenurus eurekensis Walcott. Cotypes. 



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

 Eureka District, Nevada. 



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



23865. Illaenurus ? ida Walcott. Cotypes. 



Upper Cambrian. Morgans Creek, Burnett Count} 7 , Texas. 



Walcott, Proc. U. S. Nat. Mus., XIII, 1S90, p. 277, pi. 20, fig. 6. 



1 12377. Hyanassa (Paranassa) arata (Say). Plesiotype. 



Pliocene. Waccamaw River, South Carolina. 



Dall, Trans. Wagner Free Inst. Sci. Phila., Ill, 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 ( porcina var.) schizopyga Dall. Holotype. 



Miocene. Cape Fear River, North Carolina. 



Dall, Trans. Wagner Free Inst. Sci. Phila., Ill, Pt. II, 1S92, p. 238. 



