536 



CRUSTACEA. 



[BUM. CAU 



flabellifer, Goldfuss, Nova. Acta. Acad. 



Caes. Leop. Nat. Cur., vol. 16, p. 360, 



Up. Silurian, 

 insularis, Billings, 1866, Catal. Sil. Foss. 



Antic., p. 66, Anticosti Gr. 

 laphami, Whitfield, 1878, Ann. Rep. Geo. 



Sur. Wis., p. 88, and Geo. Wie., vol. 4, 



p. 310, Niagara Gr. 

 lunatus, Billings, 1857, Rep. of Progr. Geo. 



Sur. Can., p. 338, Trenton Gr. 

 niagarensis, Hall, 1852, Pal. N. Y., vol. 2, 



p. 314, Niagara Gr. 

 occasus, Winchell & Marcy, 1865, Mem. 



Bost. Soc. Nat. Hist, vol. 1, p. 104, 



Niagara Gr. 

 pompilius, Billings, 1863, Proc. Port. Soc. 



Nat. Hist., vol. 1, p. 123, Low. Held. Gr. 

 tullius, Hall, 1888, Pal. N. Y., vol. 7, p. 12, 



Ham. Gr. 

 Bumastus, Murchison, 1839, Sil. Syst Not 



American, though I have illustrated 



the genus because so many have re- 

 ferred Illsenus to it. 



FIG. 981. Bumastus barriensis. 



barriensis, see Illaenus ioxus. 



trentonensis, see Illsenus trentonensis. 

 BUNODELLA, Matthew, 1888, Trans. Roy. Soc. 

 Can., p. 56. Body ovate-elongate, tri- 

 lobed longitudinally ; cephalic shield 

 subtriangular, with rounded angles ; 

 composed of a glabella, fixed cheeks 

 and movable (?) cheeks; glabella 

 broadly cylindrical and rounded in 

 front ; fixed cheeks expanded in front, 

 and having ear-shaped lateral lobes de- 

 fined by an impressed line which may 

 have been movable ; thorax, so far as 

 known, had seven segments, and con- 

 sisted of an elongate cylindro-conical 

 body, having triangular lappets or 

 pleurae attached at the sides. Type B. 

 horrida. 



horrida. Matthew, 1888, Trans. Roy. Soc. 

 Can., p. 56, Up. Silurian or Low. De- 

 vonian. 



CALYMENE, Brongniart, 1822, Hist. Nat. 

 Crust. Foss., p. 7. [Ety. kekalymenos, 

 concealed.] Cephalic shield sublunate, 

 margin thickened, distinctly defined; 

 glabella convex, narrower in front than 

 behind, three lateral furrows on each 

 side, the posterior one deep, neck seg- 

 ment well defined, eyes, small, promi- 

 nent, hiant, near the glabella fur- 

 rows, and slightly anterior to the 

 middle; facial sutures cut the margin, 

 in front of the eyes and curving slightly 

 over each eye, defining a semicircular 



eye-lobe, they extend to the lateral an- 

 gles, each of which is exactly bisected ; 

 anteriorly they are connected by a 

 rostral suture, thorax of thirteen seg- 

 ments, axis most convex, lateral lobes 

 wider than axis, bent down with large 

 facets; pygidiuin semi-oval, axis 

 prominent, seven to eleven segments, 

 margin entire. Type C. blumenbachi. 



anchiops, see Dalmauites anchiops. 



becki, see Triarthrus becki. 



blumenbachi, Brongniart, 1822, Hist. Nat. 

 Crust. Foss., p. 11. American form 

 called C. niagarensis. 



bucklandi, syn. for Ceraurus pleurexan- 

 themus. 



bufo, see Phacops bufo. 



callieephala, Green, 1832, Monograph 

 Trilobites, p. 30, and Pal. N. Y., vol. 1, 

 p. 238, Trenton and Hud. Riv. Grs. 



camerata, Conrad, 1842, Jour. Acad. Nat. 

 Sci., vol. 8, p. 278, and Pal. N. Y., vol. 

 2, p. 337, Coralline limestone. 



christyi, Hall, 1860, 13th Rep. N. Y. St. 

 Mus. Nat. Hist., p. 119, Hud. Riv. Gr. 



clintoni, Vanuxem, (Hemicrypturus clin- 

 toni,) Geo. Rep. 3d Dist. N. Y., p. 79, 

 Clinton Gr. 



conradi, Emmons, 1856, Am. Geol.,p. 236, 

 Hud. Riv. Gr. 



crassimarginata, see Proetus crassimargin- 

 atus. 



mammillata, Hall, 1861, Geo. Rep. Wis., 

 p. 50, Trenton Gr. 



marginalis, see Proetus marginalis. 



multicosta, Hall, 1847, Pal. N. Y., vol. 1, 

 p. 228, Birdseye and Trenton Gr. 



nasuta, Ulrich, 1879, Jour. Cin. Soc. Nat 

 Hist, vol. 2, p. 131, Niagara Gr. 



FIG. 982. Calymene callicephala. Rolled speci- 

 men and the under side of cephalic shield 

 with hypostoma in place. 



niagarensis, Hall, 1843, Geo. Rep. 4th 

 Dist. N. Y., p. 102, and Pal. N. Y., vol. 

 2, p. 307, Niagara Gr. This is the 

 American variety of C. blumenbachi. 



nupera, see Phacops nupera. 



odontocephala, syn. for Dalmanites selen- 

 urus. 



phlyctainodes, see Encrinurus phlyctai- 

 nodes. 



platys, Green, 1832, Monograph of Trilo- 

 bites, p. 32, and Illust. Devon. Foss., 

 pi. 1, Schoharie grit. 



rostrata, Vogdes, 1880, Proc. Acad. Nat. 

 Sci., p. 176, Clinton Gr. 



rowii, see Proetus rowii. 



rugosa, Shumard, 1855, Geo. Rep. Mo., p. 

 200, Low. Held. Gr. 



