252 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 57 



PLATES PAGE 



Plate 2>7- Cryptozoon proliferum 280 



38, 39. Climactichnites youngi 282, 284 



40. Climactichnites wilsum 286 



41. Lingulella (Lingulepis) acuminata, Lingulella prima, Tribli- 



dium cornutaforme, Pelagiella minutissima, Pelagiella hoyti, 

 and Mather ella saratogensis 288 



42. Matthevia variabilis 290 



43. Palceacmaa typica, Hyolithellus papillatus, Hyolithes gibbosus, 



Lonchocephahis calciferiis, Agraulos saratogensis, Ptychas- 

 pis speciosus, and Ptychoparia minuta 292 



44. Dicellocephalus hartti, Dicelloccphalus tribuUs, Conocephalina 



zuhitehallensis, Pagodia scclyi. and Ptychoparia mathcri. .. . 294 



45. Neolenus serratus 296 



46. 47. Protichnites septernnotatus 298, 300 



48, 49. Protichnites logananiis 302, 304 



INTRODUCTION 



When engaged in reconnaissance work in Saratoga County, New 

 York, during the summer of 1878 I found a small group of fossils 

 in a thick-bedded, hard gray siliceous limestone at Hoyts quarry, 4 

 miles west of Saratoga Springs. The limestone and included fossils 

 were referred to the " Califerous formation " ' and attention called to 

 the relation of the Hoyt quarry fauna to that of the " Potsdam sand- 

 stone of Iowa and Wisconsin." The species described were Platy- 

 ceras minutissima, Metoptoma cornutaforme, Conocephalites calcif- 

 eriis, C. hartti, and Ptychaspis speciosus. Subsequently drawings 

 were prepared illustrating the species and a large plate was made up, 

 photographed, and distributed to a few investigators in July, 1885. 

 In 1890 several additional species were described from the Hoyt 

 quarry and illustrated and referred to the Upper Cambrian.^ These 

 included Platyceras hoyti, Trochus ? saratogensis, and Agraulos 

 saratogensis. At various times in 1886 and 1888 I made brief visits 

 to different localities about the Adirondack Mountains, New York, 

 where the Potsdam sandstone member of the series was exposed. 

 The results cf these observations were included in a summary pub- 

 lished in 1891 ' of the Cambrian formations of the Adirondack sub- 

 province, reference being made to the fossils found. In 1903 

 the name " Saratogian " was proposed ' for the formations and con- 

 tained faunas then referred to the Upper Cambrian. 



^Thirty-second Ann. Rept. New York State Museum, 1879, pp. 129-131. 

 " Proc. U. S. National Museum, Vol. 13, 1890. pp. 268 and 276. 

 * Bull. U. S. Geol. Survey, No. 81, 1891, pp. 341-347. 

 \Tourn. Geol, Chicago, Vol. 11, No. 3, 1903, pp. 318, 319. 



