326 BULLETIN 53, UNITED STATES NATIONAL MUSEUM. 



1538 1. Hyolithellus micans (Billings). Plesiotype. 



15382. Lower Cambrian. Troy, and Schodack Landing, New 



York. 



Walcott, Bull. No. 30, U. S. Geol. Surv., 1886, p. 142, pi. 14, figs. 

 2-2e; Tenth Ann. Rept. U. S. Geol. Surv., 1890, p. 624, pi. 79, 

 figs. i-ie. 



17444. Hyolithellus micans rugosa Walcott. Holotype. 



Lower Cambrian. Washington County, New York. 



Walcott, Amer. Journ. Sci. (3), XXXIV, 1887, p. 191, pi. 1, 

 fig. 10; Tenth Ann. Rept. U. S. Geol. Surv., 1890, p. 624, pi. 

 79, %• 2. 



15388. Hyolithes americanus Billings. Plesiotype. 



Lower Cambrian. Troy, New York. 



Walcott, Bull. No. 30, U. S. Geol. Surv., 1S86, p. 132, pi. 13, figs. 

 6-6f; Tenth Ann. Rept. U. S. Geol. Surv., 1890, p. 620, pi. 75, 



figS. 2-2f. 



23850. Hyolithes attenuatus Walcott. Holotype. 



Upper Cambrian. Highland Range, Central Nevada. 



Walcott, Proc. U. S. Nat. Mus., XIII, 1890, p. 269, pi. 20, figs. 

 11, 11a. 



8579. Hyolithes billingsi Walcott. Plesiotype. 



14903. Lower Cambrian. L'Anse au Loup, Labrador; Pioche, 



15377. Nevada. 



Walcott, Bull. No. 30, U. S. Geol. Surv., 1886, p. 134, pi. 13, figs, 

 i-id; Tenth Ann. Rept. U. S. Geol. Surv., 1890, p. 620, pi. 75, 

 figs. i-ie. 



See Hyolithes primordialis ? 



14426. Hyolithes carbonaria Walcott. Cotypes. 



Lower Carboniferous. Eureka District, Nevada. 



Walcott, Mou. VIII, U. S. Geol. Surv., 1884, p. 264, pi. 23, fig. 3. 



14S84. Hyolithes communis Billings. Plesiotype. 



15387. Lower Cambrian. Bic Harbor, Quebec, Canada, and 



Troy, New York. 



Walcott, Bull. No. 30, U. S. Geol. Surv., 18S6, p. 136, pi. 14, figs. 

 3~3e; Tenth Ann. Rept. U. S. Geol. Surv., 1890, p. 620, pi. 77, 

 figs. 3-3g- 



15386. Hyolithes communis emmonsi (Ford). Plesiotype. 



Lower Cambrian. Troy, New York. 



Walcott, Bull. No. 30, U. S. Geol. Surv., 1S86, p. 137, pi. 14, figs. 

 4-40; Tenth Ann. Rept. U.S. Geol. Sun-., 1890, p. 621, pi. 77, 

 figs. 4-4b. 



23849. Hyolithes ? corrugatus Walcott. Cotypes. 



Upper Cambrian. Highland Range, central Nevada. 



Walcott, Proc. U. S. Nat. Mus. , XIII. 1S90, p. 270, pi. 20, fig. 9. 



23851. Hyolithes curvatus Walcott. Cotypes. 



Upper Cambrian. Highland Range, central Nevada. 



Walcott, Proc. U. S. Nat. Mus., XIII, 1890, p. 269, pi. 20, figs. 7, 7a. 



