TYPE SPECIMENS OF INVERTEBRATE FOSSILS. 309 



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

 Ivaraniie iCret.). Mouth of Judith River, Montana. 



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

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



454, ph 27, fig. 28. 



See HeHx vitrinoides. 



2104. Helix vitrinoides Meek and Hayden. Cotype.s. 



Laramie ( Cret. ). Mouth of Judith River. 



Meek and Hayden, Proc. Acad. Nat. Sci. Phila., for 1S57, p. 135. 



= Helix vetu.sta. 



18359. Helminthoidichnites marinus (Emmons)? Plesiotype. 



Lower Cambrian. Washington County, New York. 



Walcott, Proc. I'. S. Nat. Mus., XII, 1S89, p. 35; Tentli 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, Men. XXX, U. vS. Geol. vSurv., 1S98, pi. 27, figs. 2, 4, 5. 



26279. 



33793. Helminthoidichnites meeki Walcott. Holotype. 



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

 mont, Montana. 



Walcott, Bull. (jCoI. Soc. Amer., X, 1899, p. 236, ])1. 2.4, fig. 7. 



33795. Helminthoidichnites? neihartensis Walcott. Cotypes. 



Greyson ( Algonkian i. (ilenwood and Neihart, Montana. 



Walcott, Bull. Cieol. Soc. Anicr., X, 1899, p. 236, pi. 24, figs. 1,2,4. 



33794. Helminthoidichnites ? spiralis Walcott. Cotypes. 



Grey.son (Algonkian). Deep Creek Canyon, near Glen- 

 mont, Montana. 

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



43566. Helopora alternata ririch. Holotype. 



Black River (Ord.). Minneapolis, Minnesota. 



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

 i6f; Geol. and Nat. Hi.st. Surv. Minn., I'inal Re])!., Ill, Pt. I, 

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



43568. Helopora divaricata Ulrich. Cotypes. 



Stones River (Ord. ). Minneapolis, Minnesota. 



Ulrich, Geol. and Nat. Hist. Surv. Minn., I'inal Rcj)!., Ill, Pt. I, 

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



43566. Helopora elegans Ulrich. Holotype. 



Richmond (Ord.). Blanchester, Ohio. 



Ulricli. Geol. and Nat. Hist. Surv. Minn., I'inal Re})t., HI, Pt. I, 

 1893, p. 194, fig. II. 



