534 



CRUSTACEA. 



[BEL. BEY. 



minganeneis. Billings, 1865, Pal. Foss., 



vol. 1, p. 353, Calciferous Gr. 

 nero, Billings, 1865, Pal. Foss., vol. 1, p. 



260, Quebec Gr. or Up. Taconic. 

 oblongus, Billings, 1860,Can. Nat. and Geo., 



vol. 5, p. 321, Quebec Gr. or Up. Taconic. 

 parvnlus, Billings, 1861, Pal. Foss., vol. 1, 



p. 16, Up. Taconic. 

 perplexus, Billings, 1865, Pal. Foss.. vol. 



1, p. 364, Potsdam Gr. or Up. Taconic. 

 perspicator, Billings, 1865, Pal. Foss., vol. 



1, p. 205, Quebec Gr. or Up. Taconic. 

 pogonipensis, Hall & Whitfield, 1877, 



U. S. Geo. Expl. 40th Parallel, vol. 4, 



p. 243, Quebec Gr. or Up. Taconic. 

 quadratus, Billings, I860, Can. Nat. and 



Geo., vol. 5, p. 320, Quebec Gr. or Up. 



Taconic. 

 saffordi, Billings, 1860, Can. Nat. and 



Geol., vol. 5, p. 321, Quebec Gr. or Up. 



Taconic. 

 seelyi, Whitfield, 1886, Bull. Am. Mus. 



Nat. Hist., vol. 1, p. 339, Birdseye Gr. 

 senectus, Billings, 1861, Pal. Foss., vol. 



1, p. 15, Up. Taconic. 

 serratus, Meek, 1873, 6th Rep. Hayden's 



Geo. Sur. Terr., p. 480, Potsdam Gr. or 



Up. Taconic. 

 ?8imillimus, Walcott, 1885, Monogr. U. S. 



Geo. Sur., vol. 8, p. 93, Quebec Gr. or 



Up. Taconic. 



smithi, Billings, 1862, Pal. 

 A Fpss.^vol. 1, p. 56, Black 



Kiv. Gr. 

 solitarius, Billings, 1865, Pal. 



Bath Foss., .vol. 1, p. 362, Up. 



smithi. Taconic. 



spiniger, Hall, 1847, (Acid- 

 aspis spininger,) Pal. N. Y., vol. 1, p. 

 241, Black River and Trenton Gr. 



stonemani, Vogdes, 1884, 12th Rep. Geo. 

 and Nat. Hist. Minn., p. 8, Trenton Gr. 



strenuus, Billings, 1865, Pal. Foss., vol. 

 1, p. 204, Quebec Gr. or Up. Taconic. 



taurifrons, Dwight, 1884, Am. Jour. Sci. 

 and Arts, 3d ser., vol. 27, p. 252, Cal- 

 ciferous Gr. 



timon, Billings, 1865, Pal. Foss., vol. 1, 

 p. 261, Quebec Gr. or Up. Taconic. 



? tuberculatus, Walcott, 1885, Monogr. 

 U. S. Geo. Sur., vol. 8, p. 91, Quebec 

 Gr. or Up. Taconic. 



vetulus, Billings, 1865, Pal. Foss., vol. 1, 



p. 365, Potsdam Gr. or Up. Taconic. 

 BELINURUS, Konig, 1825, Icones Fossilium 

 Sectiles, p. 230. [Ety. belos, dart ; oura, 

 tail.] Cephalo-thoracic shield sub- 

 crescentiform, more than twice as wide 

 as long, lateral angles pointed ; ocular 

 ridge surrounds a transversely subel- 

 liptical area, within which there is a 

 crown- shaped area, surrounded by a 

 ridge; eyes small, and at the lateral 

 extremities of the subelliptical area; 

 mesial lobe narrow, and contracted 

 toward each end ; lateral lobes wide, 

 flattened on the margin and serrate on 

 the edge; relson tapering to a point. 

 Type B. bellulus. 



danas, see Euproops danse. 

 laccei, Packard, 1885, Am. Naturalist, vol. 

 19, p. 291, Coal Meas. 



FIG. 974. Belinurus bellulus. e, Position of eye, 

 at the lateral extremity of a transversely 

 elliptical area. 



BEYRICHIA, McCoy, 1844, Syn. Sil. Foss. 

 Ireland, p. 57. [Ety. proper name.] 

 Carapace equivalve, oblong, extremi- 

 ties rounded, ventral border semicir- 

 cular, dorsal straight ; valves wider at 

 the caudal than the cephalic extremity, 

 more or less convex, impressed with 

 transverse furrows. Type B. klredeni. 

 sequilatera, Hall, 1860, Can. Nat. and 

 Geo., vol. 5, p. 158, and Acad. Geol., p. 

 609, Up. Silurian. 



americana, Shumard, 1858, (Cythere amer- 

 icana,) Trans. St. Louis Acad. Sci., vol. 

 1, p. 227, Up. Coal Meas. 

 arcuata, Bean, 1886, Lond. Geo. Mag., p. 



438, Low. Held. Gr. 

 atlantica, Billings, 1865, Pal. Foss., vol. 1, 



p. 300, Quebec Gr. or Up. Taconic. 

 bella, Walcott, 1883, 35th Rep. N. Y. St. 

 Mus. Nat. Hist., p. 213, Trenton Gr. 



chambersi, S. A. Miller, 

 1874, Cin. Quar. Jour. 

 Sci., vol. 1, p. 234, 

 Hud. River Gr. 

 ciliata, Emmons, 1855, 

 American Geo., p. 219, 

 Hud. Riv. Gr. 

 cincinnatiensis, see Pri- 

 mitia cincinnatiensis. 

 clathrata, Jones, 1858, Ann. and Mag. Nat. 

 Hist., 3d series, vol. 1, p. 242, Niag- 

 ara Gr. 



decora, Billings, 

 1866, Catal. Sil., 

 Foes. Antic., p. | 

 67, Anticosti Gr. 

 dagon, Clarke, 1855, 

 Bull. U. S. Geo. 

 Sur., No. 16, p. FIG> m _Beyrlchia dur- 

 29, Genesee y i. Magnified 25 diam. 

 Shale. 



duryi, S. A. Miller, 1874, Cin. Qnar. Jour. 

 Sci., vol. 1, p. 232, Hud. Riv. Gr. 



FIG. 975. Be y- 

 richia chambers!. 

 Mag. 12 diam. 



