THE NATURAL HISTORY SURVEY. 197 



1867. Dalmania vigilans. Hall, 20th Rep. N. Y. St. Cab. Nat* 

 Hist., p. 335, figs. 1-2;. p. 375, pi. 21, figs. 16-18. 

 Niagara: Waukesha, Wauwatosa, etc., Wis. 



1870. Dalmania vigilans. Hall, 20th Rep. N. Y. St. Cab. Nat. 

 Hist. (rev. ed.), p. 426, figs. 13-14, pi. 21, figs. 16-18. 



Niagara: Waukesha, Wis. 



1901. Dalmanites (Synphoria) vigilans. van Ing., School of Mines 

 Quart., vol. 23, p. 67. 



Silurian: St. Clair Spring, Independence Co., Ark. 

 1904. Dalmanites (Synphoria} vigilans. Kindle, 28th Ann. Rep. 

 Dep. Geol. and Nat. Res., Indiana, p. 485, pi. 23, figs. 4-7. 

 pi. 24, fig. 20. ' 



Niagara: Anderson and Pendleton, Ind. 



1907. Dalmanites vigilans. Weller, This Bulletin, p. 276, pi. 24, 

 figs. 1-4. 



Niagaran: Joliet and near Lemont, 111. 

 Dalmanites werthneri Foerste 



1885. Dalmanites werthneri. Foerste, Bull. Sci. Lab. Den. Univ., 

 vol. 1, p. 116. 



Clinton: Near Dayton, Ohio. 



1887. Dalmanites werthneri. Foerste, Bull. Sci. Lab. Den Univ. 

 vol. 2, p. 101, pi. 8, figs. 22, 22a, 23-25. 



Clinton: Near Dayton, Ohio. 



1895. Dalmanites werthneri. Foerste, Geol. Surv. Ohio, vol. 7, 

 p. 530, pi. 27, figs. 22, 22a, 23-25. 

 Clinton: Ohio. 



DEIPHON Barrande, 1850. 

 Deiphon americanus Weller. 



1907. Deiphon americanus. Weller, This Bulletin, p. 268, pi. 24, fig. 

 14. 



Niagaran: Joliet, Romeo and near Lemont, 111. 

 Deiphon forbesi Barr. 



1850. Deiphon forbesii. Barrande, Haidinger's Berichte, p. 6. 



Etage E. : Bohemia. 



1865. Deiphon forbesi. Salter, Monog. British Trilobites, p. 88, 

 pi. 7, figs. 1-12. 



Wenlock limestone and shale : England. 



1895. Sphaerexochus pisum. Foerste, -Geol. Surv. Ohio, vol. 7, 

 p. 528, pi. 37A, figs. 14a-14b. 

 Niagara shale: Lockport, N. Y. 

 Clinton: Ohio. 



1901. Deiphon forbesi. van Ingen, School of Mines Quart., vol. 

 23, p. 35 (no description). 



Silurian: St. Clair Spring, Independence Co., Ark. 



DICRANOPELTIS Corda, 1847. 



Dicranopeltis arkansana (van Ing.). 



1901. Arges arkansana. van Ing., School of Mines Quart., vol. 23, 

 p. 61, fig. 19. 



Silurian: St. Clair Spring, Independence Co., Ark. 



