xlii 
SYNOPSIS OF GENERA. 
1854. Proetus, Wirtgen and Zeilbr. Verhandl. d. Naturhist. Vereins. 
1855. Proetus, Shdmard. Geol. Siirv. Missonri. 
1856. Cylindraspis, Richter. Beitr. zur Palaontol. d. Thiii-ingerwaldes. 
1858. Proetus, Bigsby. Quart. Jour. Geol. Soc. 
1858. Proetus, F. A. Robmbr. Beitr. iv zur Harzgeb. . 
1858. ProHus, Gibber. Silur. Faun. Unterharz. 
1859. Proetus, Halt. Pal. N Y., vol. iii. 
1860. Proetus, Hall. Thirteenth Kept. N. Y. State Cab. Nat. Hist. 
1860. ProiHyus, Billings. Canadian Naturalist and Geologist. 
1861. Proetus, Hall. Descrip. New Species Fossils. Kept. N. Y. State Cab. Nat. Hist. 
1862. Proetus, Hall. Fifteenth Kept. N. Y. State Cab. Nat. Hist. 
1863. Proetus, Shumard. Trans St. Louis Acad. Sci. 
1863. Proetus, Richter. Zeitschr. der deutscher. geol. Gesellschaft. 
1864. ProHus, Richter. Zeitschr. der deutscher. geol. Gesellschaft. 
1865. Proetus, Meek and Worthen. Proc. Acad. Nat. Science. 
1865. Proetus, Richter. Zeitschr. der dentsch. geol. Gesellschaft. 
1868. Proetus, Meek and Worthen. Geol. Surv. Illinois, vol. iii. 
1868. Gerastos, Dewalqub. Prodroin. d’une Descr. g^ol. de Belgique. 
1869. Proetus, Linnarsson. Vestergotl. camb. och silur. AHag. 
1870. Proetus, Tietzb. Devon. Schicht. Ebei’sdorf. 
1871. Proetus, Meek. Proc. Acad. Nat. Science. 
1872. Proetus, Kayser. Zeitschr. der deutsch. geol. Gesellschaft. 
1872. Proetus, Meek. Amer. Jour. Science. 
1872. Proetus, BarrandE. Syst. Sil. BohSme. vol. i, Suppl. 
1873. Proetus, Meek. Geol. Surv. Ohio Palieontology, vol. i. 
1874 Proetus, Billings Palieoz. Foss. Canada, vol. ii. 
1875. Proetus, Hall and Whitfield. Geol. Surv. Ohio Palieontology, vol. ii. 
1876. Proetus, C. F. Rcemer. Lethsea palseozoica. 
1876. Proetus, Hall. Illustrations of Devonian Fossils. 
1877. Proetus, Hall and Whitfield. U. S. Geol. Surv. Expl. Fortieth Parallel. 
1877. Proetus, Meek. II. S. Geol. Surv. Expl. Fortieth Parallel. 
1878. Proetus, Foi'hesia, Celmus, Angelin. Palieontologia Scandinavica. 
1879. Proetus, Novak. Studien an Hypostomen, i. 
1879. Proetus, Harris. Proc. Davenport Acad. Science. 
1880. Beclienella, Kayser. Zeitsch. der deutsch. geol. Gesellschaft. 
1881. Proi'Gis, Williams. Amer. Jour. Science. 
1881. Proetus, Wethbrby. Jour. Cincinnati Soc. Nat. Hist. 
1883. ProHus, Woodward. Geological Magazine. 
1884. Proetus, Walcott. Palieontol. Eureka Dist. 
1884. Proetus, Novak. Studien an Hypostomen, ii. 
1885. Proehis, Pechenetla, Clarke. Geol. Succession in Ontario Co. 
1 885. Proetus, CEiilbrt. Bull, de la Soc. d’Etudes Scientif. d’Angers. 
1885. Proetus, Maurer. Kalke von Waldgirmes. 
1885. ProHus, Zittel. Handb. d. Palieontoiogie. 
1886. ProHus, Maurer. Fauna d. rechtsrhein. Unterdev. 
1887. Dechenella, Stainer. Ann. de la. Soc. gdol. de Bretagne. 
1887. ProHus, PhUlvpsia (partini), Herrick. Bulletin Denison University. 
1887. ProHus, Foerste. Bulletin Denison University. 
1887. Dechenella, Tschernyschew. Mem. Comite gdol., vol. iii. 
1887. ProHus, CEhlbrt. Annales d. Societe Geologique, vol. xix. 
1887. ProHus, Vogdes. Ann. N. Y. Acad. Science. 
1888. ProHus, Dechenella, Frech. Zeitschr. der deutsch. geol. Gesellschaft. 
