XXVI 
SYNOPSIS OF GENERA. 
1859. Bronteus, Hall. Pal. N. Y., vol. ill. 
1862. Bro7iteus, McCoy. Synops. Sil. Foss. Ireland. 
1863. Bronteus, Billings. Dev. and Silur. Foss., Sqiiai'e Lake, Maine. 
1866. Bronteiis, Billings. Cat. Silur. Foss. Anticosti. 
1866. Brnnte^is, F. A. Rcembr. Beitr. v ziir Harzgeb. 
1867. Bi'onteus, Hall. Twentieth Kept. N. Y. State Cab. Nat. Hist. 
1870. Bronteus, Bonnissbnt. Essai sur la gdologie de la Manche. 
1872. Bronteus, Barkande. Syst. Sil. Boli^me. vol. i, Suppl. 
1874. Bronteus, Gosselbt. Bull, de l’Aca<l. roy. de Belgique. 
1876. Goldius, Tkomblin and Lebbsconte. Bull. Soc. gdol. de France. 
1876. Bronte7is, RasMER. Lethiea palseozoica. 
1877. Bronteus, 'I’romelin and Grasset. Assoc, francais Avanc. Sci. 
1878. Brontetis, Whitfield. Ann. Rept. Geol. Surv. Wisconsin. 
1878. Goldms, Bayle. Exjil. Carte gdologique de France, Atlas. 
1878. Broiiteus, Kayser. Fauna lelt. Devon. Abl. d. Harzes. 
1879. Bronte7is, Kayser. Zeitschi-. der deutsch. geol. Gesellschaft. 
1879. Bronteus, Novak. Studien an Hypostoinen, i. 
1882. Bronteus, AVhitfield. Geol. Wisconsin, vol. iv. 
1883. Bronteus, Novak. Zur Kenntn. bohm: Trilob. 
1884. Riwiiews, Clarke. Neues Jahrb. fiir Min. 
1884. Bnmteus, Novak. Studien an Hypostoinen, ii. 
1885. Goldius, CEhlert. Bull. de-laSoc. d’Etudes Scientif. d’Angers. 
1885. Bro7itetos, Barrois. Ann. Soc. geol. du Nord. 
1885. Bi\mteus, Maurer. Kalke von Waldgirmes. 
1885. Bronteus, Zittel. Handb. d. Palseontologie. 
1886. Bronteus, Barrois. Ann. Soc. geol. du Nord. 
1887. Goldius, Tsciiernychew. M6m. Comitd. g6ol. 
1888. Brontes, Frbch. Zeitschr. der deutsch. geol. Gesellschaft. 
1888. Bro>iteus, Penecke. Zeitschr. der deutsch. geol. Gesellschaft. 
Diagnosis. Body broadly oval. Cephalon semi¬ 
circular, with sharp, often somewhat produced genal 
angles. Glabella closely appressed to the cheeks, 
broad anteriorly and extending to the frontal mar¬ 
gin. Lateral furrows indistinct or obsolete. The 
facial sutures begin on the posterior margin, and in 
front of the eyes run nearly parallel to the margin of the glabella, being con¬ 
tinuous on the frontal margin. Eyes lunate, hoinocorneal, and situated some¬ 
what posteriorly. Thorax slightly larger than the cephalon, and composed 
of ten segments, which upon the pleurae are simple and sharply pointed. 
Pygidium very large, depressed-convex, parabolic in outline, with a very short 
sub-triangular axis. The pleurae each bear seven or eight simple ribs, arranged 
on each side of a larger median simple or compound rib. 
