COL. — CON.] 



CRUSTACEA. 



539 



.— Colpocaris 

 bradleyi. 



narrow trail, with cross furrows, 

 making it ladder-like. It may not be 

 the track of a Crustacean. Type C. 

 wilsoni. 



fosteri, Chamberlin, 1883, Geo. of Wis., 

 vol. 1, p. 132, Potsdam Gr. 



wilsoni, Logan, 1860, Can. Nat. and Geol., 

 vol. 5, and Geo. of Can., p. 107, Pots- 

 dam Gr. 



youngi, Chamberlin, 1883, Geo. of Wis., 

 vol. 1, p. 132, Potsdam Gr. 

 Colpocaris, Meek, 1872, Proc. Acad. Nat. 

 Sci. Phil., p. 323. [Ety. kolpos, sinus ; 

 karis, shrimp.] Carapace valves are 

 truncated backward and upward, with 

 a profoundly sinuous outline ; posterior 

 extremity of the dorsal margin pro- 

 duced, pointed and curved downward ; 

 ventral margin inflected; attached on 

 the dorsal margin by a flexible liga- 

 ment ; no eye tubercle or spot. Type 

 C. bradleyi. 



bradleyi, Meek, 1872, 

 Proc. Acad. Nat. 

 Sci. Phil., vol. 24, 

 p. 322, and Ohio 

 Pal., vol. 2, p. 318, 

 Waverly Gr. 

 ch^sterensis, W o r - 

 then, 1884, Bull. 

 No. 2, 111. St. Mus. 

 Nat. Hist., p. 3, and Geo. Sur. 111., vol. 

 8, p. 153, Kaskaskia Gr. 



elytroides, Meek, 1872, Proc. Acad. Nat. 

 Sci. Phil., vol. 24, p. 334, and Ohio Pal., 

 vol. 2, p. 319, Waverly Gr. 

 Conocephalws, Zenker, 1833, Beitr. z. Naturg. 

 d. Urwelt, p. 49. Preoccupied for a 

 genus of Orthoptera. 

 Conocephalites, Barrande, 1852, Syst. Sil. 

 Boh. This genus is regarded as a syn- 

 onym for Ptychoparia, by Walcott, who 

 also refers Atops, which has priority, 

 to the same genus. After examining 

 the original figure of Ptychoparia, I 

 am not convinced that it is a synonym 

 for Atops, hence I retain both names. 

 There were but few genera better 

 defined and established than Atops, 

 when the name was put forth by 

 Emmons ; hence the rules of priority 

 demand its retention. 



adamsi, see Conocoryphe adamsi. 



anatinm, see Ptychoparia anatiua. 



antiquatus, see Ptychoparia antiquata. 



arenosus, see Ptychoparia arenosa. 



aurora, see Liostracus aurora. 



baileyi, see Conocoryphe baileyi. 



billingsi, see Ptychoparia billingsi. 



binodosus, see Ptychoparia binodosa. 



calciferus, see Ptychoparia calctfera. 



calymenoides, see Ptychoparia calyme- 

 noides. 



cordillerse, see Ptychoparia cordillerse. 



depressus, see Ptychoparia depressa. 



diadematus, see Ptychoparia diademata. 



elegans, see Conocoryphe elegans. 



eos, see Crepicephalus eos. 



eryon, see Ptychoparia eryon. 



explanatus, see Ptychoparia explanata. 



formosus, see Solenopleura formosa. 



gemini-spinosus, see Conocoryphe gemini- 

 spinosa. 



halli, see Solenopleura halli. 



hartti, see Ptychoparia bartti. 



laticeps, see Pterocephalia laticeps. 



matthewi, see Harttia matthewi. 



minor, see Ptychoparia minor. 



minutus, see Ptychoparia minuta. 



miser, see Atops miser. 



nactus, Hall. Not defiued so as to be 

 recognized. 



nasutus, see Ptychoparia nasuta. 



neglectus, see Liostracus neglectus. 



optatus, see Ptychoparia optata. 



orestes, see Solenopleura orestes. 



ouangondianus, see Liostracus ouangondi- 

 anus. 



oweni, see Ptychoparia oweni. 



pattersoni, see Ptychoparia pattersoni. 



perseus, see Ptychoparia perseus. 



quadratus, Haitt, see Liostracus quad- 

 ratus. 



quadratus, Whitfield, see Ptychoparia 

 quadrata. 



robbi, see Solenopleura robbi. 



shumardi, see Ptychoparia shumardi. 



subcoronatus, see Ptychoparia subcoronata. 



tener, see Liostracus tener. 



teucer, see Ptychoparia teucer. 



thyrsites, see Solenopleura thyrsites. 



verrucosus, see Ptychoparia verrucosa. 



vulcanm, see Crepicephalus vulcanus. 



winona, see Ptychoparia winona. 



zenkeri, see Ptychoparia zenkeri. 

 Conocoryphe, Corda, 1847, Prodrom einer 

 Monographie der bohmischen Trilobi- 

 ten, p. 139. [Ety. konos, cone; koryphe, 

 top of the head.] Cephalic shield 

 somewhat semicircular, convex; gla- 

 bella convex, somewhat cone-shaped, 

 widest behind, rounded in front, 

 from one-half to three-fourths the 

 length of the head, lateral furrows from 



, one to three on each side, more or less 

 distinct ; facial sutures cut obliquely 

 across the margin from about the be- 

 ginning of the lateral third, and curve 

 around the eyes, and then curve out- 

 ward toward the posterior angles ; 

 (in C. sulzeriand as described by Corda, 

 the facial sutures begin near the apex 

 directly in front of the eyes, and are 

 directed in lines nearly parallel to the 

 eye-lobes.) Thorax eight to sixteen 

 segments, axial lobe narrower than 

 lateral lobes, pleurae faceted ; pygidium 

 small. Type C. sulzeri. 



adamsi, Billings, 1861, (Conocephalites 

 adamsi,) Geo. Vt., vol. 2, p. 950, Up. 

 Taconic or Georgia Gr. 



baileyi, Hartt, 1868, (Conocephalites 

 baileyi,) Acad. Geol., p. 645, St. John Gr. 



elegans, Hartt, 1868, (Conocephalites 

 elegans,) Acad. Geol., p. 650, St. John Gr. 



gallatinensis, Meek, 1873, 6th Rep. Hay- 

 den's U. S. Geo. Sur. Terr., p. 485, Up. 

 Taconic. 



