297 



Hyol. 



L.C^ R*7^ 



Hyolithes princeps. (Billings, 1872, Can. Nat. Vol. 6, 



213, 216, figs. 4^, 5) 

 MX. Pt&te .13, ;^..5 ^^^^.^^.^.^^^1^ Walcott, Bull. U. 



S. G.S. No.30,page 

 135, plate 13, fig. 5, 

 back view ; 5a side 

 view, natural size; 

 5b. cross section of 

 a more rounded 

 specimen. — Lower 



Canihrian^ conglomerate limestone, below Quebec. — Note. 



Flas been recoguized on Silver Peak, Nevada. L. C. 



Hyolithes principalis. Villa. See Appendix. 



Hvolithes shaleri. Walcott, Bulletin U. S. G. S. No. 10, 



4"it>^ page 44, plate 7, fig. 4, back 



view; 4<^, front view; 45, side 

 view, natural size ; 4(?, cross 

 section. — Middle Cambrian 

 ( Paradoxides argillite) form- 

 ation. Hay ward's quarry, S. 

 Braintree, Mass. M. C. 



The most nearly related 

 American species of Hyo- 

 lithes is H. excellens^ Billings 

 (Pal. Foss. Vol. 2, pt.l,p.70, 

 fig. 39, 1874), from Smith's 

 Sound, Trinity Bay, New 

 Foundland ; but although 

 closely allied they seem to be 

 distinct species. Walcott. 



Hyolithes singulus. VIII c. See Appendix. 



Hyolithes striatus. VIII c. See Appendix. 



Hyolithes triliratus. VIII c. See Appendix. 



Hyolithes vanuxemi. {Theea). Walcott, in Bull. U. 8. 

 Geol. Sur. No. 30, page 132 (table) ; assigned to the Lower 

 Silurian ( Ordovieian) system, II? III? — See Appendix. 



Hyolithes ? 00, p. 235, specimen 808-5 (base of 



the fossil only) in Fellows' coll. at Dingman's Ferrj'-, Pike Co., 

 Pa., from Hamiltcn. VIII c. 



