540 



CRUSTACEA. 



[COR CYB. 



FIG. 987. Conocoryphe 

 kingi. 



geminispinosa, Hartt, 1868, (Conocepha- 

 lites geminispinosus,) Acad. Geol., p. 

 653, St. John Gr. 



kingi, Meek, 

 1870, P r o c . 

 Acad. Nat. Sci. 

 Phil., vol. 22, 

 p. 63, and Rep. 

 on 40th Par- 

 allel, p. 20, Up. 

 Taconic. 



quadrans, Hall & 

 Whitfield, 1877, 

 (Crepicephalus 

 quadrans,) Geo. 

 40th Parallel, 

 vol. 4, p. 238, 

 Up. Taconic. 

 walcotti, M a t - 

 thew, 1884, 

 Trans. Roy. Soc. 

 Can., p. 119, St. John Gr. 

 Coronwra, Hall, 1888, Pal. N. Y., vol. 7, p. 

 32. Founded upon the variation in the 

 spines of the pygidium of Dalmanites. 

 Corycephalus, Hall, 1888, syn. for Dalman- 

 ites. 



CREPICEPHALUS, Owen, 1852, Geo. Sur. Wis. 

 Iowa, and Minn., p. 376. [Ety. krepis, 

 horseshoe ; kephale, head.] Glabella 

 rather flat, slipper-shaped, tapering 

 and slightly acuminated anteriorly, 

 with a faint ridge in the median line ; 

 two small depressions, and a posterior 

 furrow partially divide the glabella; 

 facial sutures run nearly parallel to 

 the margin of the glabella, and join a 

 thickened, cord-like, anterior, narrow 

 border, inclosing a convex area, nar- 

 rower in front than at the sides ; pygid- 

 ium large ; axial lobe has four seg- 

 ments, side-lobes bounded by a slightly 

 concave border, which widens poste- 

 riorly, and terminates in long spines, 

 and of which the confines are almost 

 rectangular, with rounded corners. 

 Type C. iowensis. 



angulatus, Hall & Whitfield, 1877, U. S. 

 Geo. Expl. 40th Parallel, vol. 4, p. 220, 

 Potsdam Gr. 



anytus, Hall & Whitfield, 1877, U. S. Geo. 

 Expl. 40th parallel, vol. 4, p. 219, Pots- 

 dam Gr. 

 angusta, Walcott, 1886, Bull. U. S. Geo. 



Sur., No. 30, p. 208, Up. Taconic. 

 centralis, Whitfield, 1877, Rep. on the 

 Pal. of Black Hills, p. 10, and Geo. 

 Black Hills, p. 341, Potsdam Gr. 

 diadematus, Hall, 1863, (Conocephalites 

 diadematus,) 16th Rep. N. Y. St. Mus. 

 Nat. Hist., p. 167, Potsdam Gr. 

 eos, Hall, 1863, (Conocephalites eos,) 

 16th Rep. N. Y. St. Mus. Nat. Hist., p. 

 151, Potsdam Gr. 

 gibbesi, Whitfield, 1880, Ann. Rep. Geo. 



Sur. Wis., p. 50, Potsdam Gr. 

 granulosus, Hall & Whitfield, 1877, U. S. 

 Geo. Expl. 40th Parallel, vol. 4, p. 

 214, Potsdam Gr. 



haguei, Hall & Whitfield, 1877, U. S. Geo- 

 Expl. 40th Parallel, vol. 4, p. 210, Pots- 

 dam Gr. 



iowensis, Owen, 1852, Geo. Sur. Wis., 

 Iowa, and Minn., p. 576, Potsdam Gr. 



FIG. 988. Crepicephalus Qao 



lilianus. Cephalic Fl , Q 989 -Crept cepha- 



- 



shield without the 

 movable cheeks. 



, 



! us 



Pygid- 



lilianus, Walcott, 1886, Bull. U. S. Geo. 



Sur., vol. No. 30, p. 207, Up. Taconic. " 

 maculosus, Hall & Whitfield, 1877, U. S. 



Geo. Expl. 40th Parallel, vol. 4, p. 215, 



Potsdam Gr. 

 miniscensis, Owen, 1852, Geo. Sur. Wis., 



Iowa, and Minn., pi. 1, fig. 14, ;Pots- 



dam Gr. 

 montanensis, Whitfield, 1876, Rep. Re- 



con. Up. Mo. to Yel. Nat. Park, p. 141, 



Potsdam Gr. 

 nitidus, Hall & Whitfield, 1877, U. S. 



Geo. Expl. 40th Parallel, vol. 4, p. 212, 



Potsdam Gr. 

 onustus, Whitfield, 1878, Ann. Rep. Geo. 



Sur. Wis., Potsdam Gr. 

 oweni, Meek & Hayden, 1861, (Arionellus 



(Crepicephalus) oweni,) Proc. Acad. Nat. 



Sci., vol. 13, p. 436, Potsdam Gr. 

 planus, Whitfield, 1877, Rep. on Pal. of 



Black Hills, p. 11, and Geol. Black 



Hills, p. 343, Potsdam Gr. 

 quadrans, see Conocoryphe quadrans. 

 simulator, Hall & Whitfield, 1877, U. S. 



Geo. Expl. 40th Parallel, vol. 4, p. 218, 



Potsdam Or. 

 unisulcatus, Hall & Whitfield, 1877, U. S. 



Geo. Expl. 40th Parallel, vol. 4, p. 216, 



Potsdam Gr. 

 vulcanus, Billings, 1861, (Conocephalites 



vulcanus,) Pal. Foss., vol. 1, p. 14, Pots- 



dam Gr. 

 wisconsinensis, see Loncbocephalus wis- 



coneinensis. 

 Cryphieus, Green, 1837, Jour. Acad. Nat. 



Sci., vol. 7, syn. for Dalmanites. Not 



well defined, and the name was preoc- 



cupied for a genus of Coleoptera in 



1833. 



ftootfu, see Dalmanites booth i. 

 calliteles, see Dalmanites calliteles. 

 greeni, syn. for Dalmanites calliteles. 

 CryptolithuH, syn. for Trinucleus. 



tesselatus, see Trinucleus concentricus. 

 Cybele, Loven, 1845, p. 110, Ofversigt 



Vetensk. Acad. Handl., p. 110. 

 punctata, Hall, 1852. This species belongs 



to the genus Encrinurus, and the spe- 

 . cific name being preoccupied, the name 



is changed to E. ornatus. 



