TYPE SPECIMENS OF INVERTEBRATE FOSSILS. 



309 



2104. Helix vetusta Meek and Hayden. Holotype and paratypes. 

 Laramie (Cret.). Mouth of Judith River, Montana. 



Meek, Rept. U. S. Geol. Surv. Terr., IX, 1876, p. 552, pi. 42, figs. 

 7a, 7b.— White, Third Ann. Rept. U. S. Geol. Surv., 1883, p. 

 454, pi. 27, fig. 28. 



See Helix vitrinoides. 



2104. Helix vitrinoides Meek and Hayden. Cotypes. 



Laramie (Cret.). Mouth of Judith River. 



Meek and Hayden, Proc. i\.cad. Nat. Sci. Phila., for 1857, p. 135. 

 = Helix vetusta. 



18359. Helminthoidichnites marinus (Emmons)? Plesiotype. 



Lower Cambrian. Washington County, New York. 



Walcott, Proc. U. S. Nat. Mus., XII, 1889, p. 35; Tenth Ann. 

 Rept. U. S. Geol. Surv., 1890, p. 603, pi. 62, figs. 1-4. 



18359. Helminthoidichnites marinus (Emmons). Plesiotypes. 



26275. Lower Cambrian. Washington County, New York. 



26277. Walcott, Mon. XXX, U. S. Geol. Surv., 1S98, pi. 27, figs. 2, 4, 5. 



26279. 



33793. Helminthoidichnites meeki Walcott. Holotype. 



Greyson (Algonkian). Deep Creek Canyon, near Glen- 

 mont, Montana. 



Walcott, Bull. Geol. Soc. Amer., X, 1899, p. 236, pi. 24, fig. 7. 



33795. Helminthoidichnites ? neihartensis Walcott. Cotypes. 



Greyson (Algonkian). Glenwood and Neihart, Montana. 



Walcott, Bull. Geol. Soc. Amer., X, 1899, p. 236, pi. 24, figs. 1, 2,4. 



33794. Helminthoidichnites ? spiralis Walcott. Cotypes. 



Gre} 7 son (Algonkian). Deep Creek Canyon, near Glen- 

 mont, Montana. 



Walcott, Bull. Geol. .Soc. Amer., X, 1899, p. 236, pi. 24, figs. 5, 6. 



43566. Helopora alternata Ulrich. Holotype. 



» Black River (Ord.). Minneapolis, Minnesota. 



Ulrich, Journ. Cincinnati Soc. Nat. Hist., XII, 1890, p. 192, fig. 

 i6f; Geol. and Nat. Hist. Surv. Minn., Final Rept., Ill, Pt. I, 

 1893, p. 192, pi. 3, fig. 9. 



43568. 



Helopora divaricata Ulrich. Cotypes. 



Stones River (Ord.). Minneapolis, Minnesota. 



Ulrich, Geol. and Nat. Hist. Surv. Minn., Final Rept., Ill, Pt. I, 

 1893, p. 191, pi. 3, figs. 1-3. 



43566. 



Helopora elegans Ulrich. 



Richmond (Ord.). Blanchester, Ohio. 



Hok^ype. 



Ulrich. Geol. and Nat. Hist. Surv. Minn., Final Rept., Ill, Pt. I, 

 i393, P- 194, fig- "• 



