316 



CKUSTACEA. 



CLASS CRUSTACEA. 



AciDASPis fimbriata, Hall, 1879, Desc. Kew 

 Spec. Foss. from Niagara Gr. fSig. 

 fimbriated.] 

 parvula, Walcott, 31st Reg. Eep. 

 Aglaspis eatoni, Whitfield, 1880, Ann. Rep. 

 Geo. Sur. Wis., Potsdam Gr. [Ety. 

 proper name.] 

 Agnostus communis. Hall & Whitfield, 

 1877, U. S. Geo. Expl. 40th parallel, 

 Potsdam Gr. [Sig. common.] 

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

 Expl. 40th parallel, Potsdam Gr. 

 [Ety. proper name.] 

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

 Geo. Expl. 40th parallel, Potsdam Gr. 

 [Sig. prolonged.] 

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

 Geo. Expl. 40th parallel, Potsdam Gr. 

 [Sig. high swelling.] 

 Agraulos woosteri, Whitfield, 1878, Ann. 

 Rep. Geo. Sur. Wis., Potsdam Gr. 

 [Ety. proper name.] 

 Amphipeltis is from Amphi, on both sides, 



instead of doubtful. 

 Arctinurus, Castelnau, syn. for Lichas. 

 Arges, signifies bright or shining, instead 



of a mythological name. 

 AiiiONELLUSConvexuSjWhitfield, 1878, Ann. 

 Rep. Geo. Sur. Wis., Potsdam Gr. 

 [Sig. convex.] 

 pustulatus, Walcott, 31st Reg. Rep. 

 AsAPHOiDiCHNUS, S. A. Miller, 1880, Jour. 

 Gin. Soc. Nat. Hist., vol. 2. [Ety. 

 Asaphus, a genus; eMos, form; ichnos, 

 i*T*jiolc 1 

 dyeri, S.* A. Miller, 1880, Jour. Gin. Soc. 

 Nat. Hist., vol. 2, Utica Slate Gr. 

 [Ety. proper name.] 

 trifidus, S. A. Miller, 1880, Jour. Gin. 

 Soc. Nat. Hist., vol. 2, Utica Slate 

 Gr. [Sig. trifid.] 

 Asaphus caudatus, Green, syn. for Dalman- 

 ites limnlurus. (?) 

 cordieri, Castelnau, syn. for Dalmanites 



limulurus. 

 crypturus was described by Green in 

 1834, Trans. Geo. Soc. Penn., vol. 1, 

 pt. 1. 

 ditmarsise, Honeyman, 1879, Proc. Nova 

 Scotia Inst., vol. 5, Lower Silurian. 

 [Ety. proper name.] 

 edwardsi, Castelnau, syn. for Dalmanites 



limulurus. 

 homalonotoides is in 31st Reg. Rep. N. 



murchisoni, Castelnau, syn. for A. gigas. 

 nodostriatus. Hall, 1847, Pal. N. Y., vol. 



1. Not defined so as to establish a 



species, 

 triangulatus, Whitfield, 1880, Ann. Rep. 



Geo. Sur. Wis , Trenton Gr. [Sig. 



triangular.] 



Atops, Emmons, 1844, Taconic System. . 

 This genus should probablj'- be re- 

 stored because it is distinct from Tri- 

 arthrus. There is only one species 

 defined. Atops trilineatus. It is ra- 

 lated to Conocephalites, and as a ge- 

 neric name has priority. 

 Bathyurus pogonipensis, Hall and Whit- 

 field, 1877, U. S. Geo. Expl. 40th 

 parallel, Quebec Gr. [Ety. proper 

 name.] 

 Beyrichia lithofactor should be defined as 

 maker of stone, and so also B. petri- 

 f actor. 



persulcata, Ulrich, 1879, Jour. Cin. Soc. 

 Nat. Hist. A^ol. 2, Hud. Riv. Gr. [Sig. 

 very much furrowed.] 



regularis was named from the regular 

 bars instead of "formed in bars." 

 Bronteus was defined by Goldfuss in 1839, 

 in Nova Act. Phys. Med. Csesarene 

 Leop-Carol. Nat. Curios, xix., pt. 1, 

 p. 360. 



canadensis, Logan, 184(5, Rep. Geo. Sur. 

 Canada, Low. Held. Gr. [Ety. proper 

 name.] 



flabellifer, Goldfnss, Nova. Acta Acad. 

 Caes. Leop. Nat. Cur. vol., 19 Up. 

 Silurian. [Sig a fan bearer.] 



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

 Sur. Wis., Niagara Gr. [Ety. proper 

 name.] 

 Calymene christyi is from the Hud. Riv. Gr. 



conradi, Emmons, 1856, Am. Geol., Lor- 

 raine Shales or Hud. Riv. Gr. [Ety. 

 proper name.] 



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

 Hist vol. 2, Niagara Gr. [Sig. nasnte.] 



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

 Sci., Clinton Gr. [Sig. hooked.] 

 Ceratiocaris grandis, Pohlman, 1881, Bull. 

 Buf. Soc. Nat. Hist., vol. 4, Water- 

 lime Gr. [Sig. grand.] 

 Ceraurus rarus is in 31st Reg. Rep. 

 Chariocephalus tumifrons, Hall & Whit- 

 field, 1877, U. S. Geo. Expl., 40th 

 parallel, Potsdam Gr. [Sig. having 

 a tumid front.] 

 Conocephalites binodosus instead of C. 

 binodus. 



calciferus, Walcott, 1879, 32 Reg. Rep., 

 Calciferous Gr. [Sig. calcifer- 

 ous.] 



calymenoides, Whitfield, 1878, Ann. 

 Rep. Geo. Sur. Wis., Potsdam Gr. 

 [Sig. like M Calymene.] 



explanatus, Whitfield, 1880, Ann. Rep. 

 Geo. Sur. Wis., Potsdam Gr. [Sig. 

 spread out] 



harti, Walcott, 1879, 32d Reg. Rep , 

 Calciferous Gr. [Ety. proper name.] 



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



