PISCES. 



319 



Protichxites alternans, P. latus, P. line- 

 atus, P. multinotatus, P. oeto-notatus 

 and P. septem-notatus are from the 

 Potsdam Gr. 



Pterocephalia Roemer, 1849, Texas, Mit 

 naturwissench. Anhang. Bonn., and 

 afterward in 1852, Kreid von Texas. 

 [Ety. pteron wing: IcephaleheaA;] It 

 18 identical with Dicellocephalus, and 

 has priority of definition, and was 

 illustrated the same year. 

 sancti-sabaa, Roemer, 1849, Texas. Mit 

 naturwissench. Anhang., and in 1852, 

 Kreid von Texas., Potsdam Gr. [Ety. 

 proper name.] 



Pterygotus buffaloensis. Pohlman, 1881, 

 Bull. Buf. Soc. Nat. Hist., vol. 4, 

 Waterlline Gr. [Etv. proper name.] 

 cummingsi, Grote & Pitt, 1877, Bull 

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

 lime Gr. [Ety. proper name.] 



Ptychaspis rainuta, Whitfield, 1878, Ann. 



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



[Sig. minute.] 



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



Geo. Expl.. 40th Parallel, Potsdim 



/ Gr. [Sig. pustulous.] 



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



[Sig beautiful.] 

 striata, Whitfield, 1878, Ann. Rep. Geo. 

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

 striated.] 



Rhachura, Scudder, 1878, Proc. Bost. Soc. 



Nat. Hist. [Ety. rachis, a ridge ; oura, 

 tail.] 

 Rhachura venosa, Scudder, 1878, Proc. 

 Bost. Soc. Nat. Hist.. Coal Meas. [Sig. 

 full of veins.] 

 Rusichxites carbonarius, Dawson, 1868, 

 Acadian Geology, Carboniferous. [Sig. 

 pertaining to Carbon.] 

 grenvillensis, Dawson, Chazy Gr. [Ety. 

 proper name.] 

 Solexopleura nana, Ford, 1878, Am. Jour. 

 Sci. and Arts. 3d ser., vol. 15, Pots- 

 dam Gr. [Sig. a dwarf.] 

 Spathiocaris, Clarke, 1882, Am. Jour. Sci. 

 and Arts, 3d ser., vol. 23. [Ety. 

 spathe, a spathe; karis, a shrimp.] 

 emersoni, Clarke, 1882, Am. Jour. Sci. 

 and Arts, 3d ser., vol. 23, Portage 

 Gr. [Ety. proper name.] 

 lutheri instead of Lisgocaris lutheri. 

 Triarthrus becki is from the Utica Slate 

 Gr. 

 fischeri, Billings, 1865, Pal. Foss., Que- 

 bec Gr. [Ety. proper name.] 

 glaber, Billings, 1859, Can. Nat. and 

 Geol., vol. 4, Utica Slate Gr. [Sig. 

 smooth.] 

 spinosus is from the Utica Slate Gr. 

 tvilineatus should be referred to Atops 

 trilineatus. 

 Trixucleus bellulus, Ulrich, 1878, Jour. 

 Cin. Soc. Nat. Hist., vol. 1, is from 

 the Utica Slate, and 6eems to be the 

 young of T. concentricus. 



CLASS ARACHNIDA. 



Eoscorpius was published in vol. 46, Am. Jour. Sci. and Arts. 



CLASS MYRIAPODA. 



Euphoberia was published in vol. 46, Am. Jour. Sci. and Arts. 



CLASS INSECTA. 



Archimylacris mantis is a typographical 



or accidental mistake, and the name 



should be stricken out. 

 Ephemerites primordialis. Scudder, 1878. 



Proc. Bost. Soc. Nat. Hist., Coal 



Meas. [Sig. primordial.] 



Termes, Linnaeus, 1748, Systema Naturae, 

 p. 610, and older authors. [Ety .termes, 

 a worm that eats wood] 

 contusus, Scudder, 1878, Proc. Bost. Soc. 

 Nat. Hist.. Coal Meas. [Sig. broken 

 or bruised] 



CLASS PISCES. 



Acoxdylacaxthus (?) mudgianus, St. 

 John & Worthen (In press), Geo Sur. 

 111., vol. 7. Up. Coal Meas. [Ety. 

 proper name.] 

 nuperus. St John & Worthen (In press), 

 Geo. Sur 111., vol. 7, Up. Coal Meas. 

 [Sig. new.] 



Acoxdylacaxthus rectus, St. John <fc 

 Worthen (In press), Geo. Sur. 111., 

 vol. 7, Up. Coal Meas. [Sig. straight.] 

 xiphias, St. John & Worthen (In press), 

 Geo. Sur. 111., vol. 7, Keokuk Gr. 

 [Sig. a sword fish.] 



Amacaxthus can not be derived from ana- 



