PISCES. 



piasaensis, St. John & Worthen, 1875, 

 Geo. Sur. 111., vol. 6, Chester Gr. [Ety. 

 proper name.] 

 ponticulus, Newberry & Worthen, 1866, 

 Geo. Sur. 111., vol. 2, Chester Gr. [Sig. 

 a little bridge.] 

 porosus, Newberry & Worthen, 1866,Geo. 



Sur. 111., vol. 2, Burlington Gr. [Sig. 



full of pores, porous.] 

 truncatus, Newberry & Worthen, 1870, 



Geo. Sur. 111., vol. 4, Burlington Gr. 



[Sig. truncated, cut off.] 

 williamsi, St. John & Worthen, 1875, 



Geo. Sur. 111., vol. 6, Keokuk Gr. [Ety. 



proper name.] 

 Pristicladodus, McCoy, 1855, British Pal. 



Rocks. [Ety. from the two genera 



Pristis and Cladodus.'] 

 springeri, St. John & Worthen, 1875, 



Geo. Sur. 111., vol. 6, Kinderhook Gr. 



[Ety. proper name.] 

 Pristodus, Agassiz. [Ety. pristis, a saw ; 



odious, a tooth.] 

 acuminatus, St. John & Worthen, 1875, 



Geo. Sur. 111., vol. 6, Kinderhook Gr. 



[Sig. sharp-pointed.] 

 Psammodus, Agassiz, 1838, Recherches sur 



les Poissons Fossiles. [Ety. psammos, 



sand ; odous, tooth.] 

 angularis, Newberry & Worthen, 1866, 



Geo. Sur. 111., vol. 2, Chester Gr. [Sig. 



angular.] 

 antiquus, Newberry, 1853, Annals of 



Science, vol. 1, and 1857, Bull. Nat. 



Inst., Corniferous Gr. [Sig. ancient.] 

 porosus, Agassiz, 1838, Recherch. Poiss. 



Foss., Chester Gr. [Sig. full of pores. ] 

 reticulatus, Newberry & Worthen, 1866, 



Geo. Sur. 111., vol. 2, Chester Gr. [Sig. 



reticulated, net work.] 

 rhomboideus, Newberry & Worthen, 1866, 



Geo. Sur. 111., vol. 2, Keokuk Gr. [Sig. 



like a rhomb, lozenge-shaped.] 

 rugosus, Agassiz, 1838, Recherch. Poiss. 



Foss., St. Louis Gr. [Sig. wrinkled.] 

 semicylindricus, Newberry & Worthen, 



1866, Geo. Sur. 111., vol. 2, Keokuk 



Gr. [Sig. half cylindrical.] 

 Psephodus, Agassiz. [Ety. psepkos, a peb- 

 ble; odous, a tooth.] 

 reticulatus, St. John & Worthen, 1875, 



Geo. Sur. 111., vol. 6, Kinderhook Gr. 



[Sig. reticulated, like net work.] 

 Ptkrichthys, Miller, 1840, in British Rep. 



[Ety. pteron, a fin ; ichthys, a fish.] 

 norwoodensis, Owen, 1846, Am. Jour. 



Sci., 2nd series, vol. 1, "Op. Held. Gr. 



[Ety. proper name.] 

 Ptyctodus, Pander, Uber die Ctenodipteri- 



nen des Devonischens Systems. [Ety. 



ptyktos, folded ; odous, a tooth.] 

 calceolus, Newberry & Worthen, 1866, 



(Rinodus calceolus) Geo. Sur. 111., 



vol. 2, Ham. Gr. [Sig. a sandal or 



slipper.] 



Pygopterus, Agassiz, 1833, Poiss. Foss., vol. 



2. [Ety. pyge, rump ; pteron, a fin.] 

 scutellatus, Newberry, 1857, Proc. Acad. 



Nat. Sci., vol. 8, Coal Meas. [Sig. 



shielded.] 

 Rhizoous, Owen, 1840, Odontography. [Ety. 



rhiza, a root ; odous, a tooth.] 

 angustus, Newberry, 1857, Proc. Acad. 



Nat. Sci. Phil., vol. 8, Coal Meas. [Sig. 



narrow.] 

 hardingi, Dawson, 1868, Acad. Geol., 



Carboniferous. [Ety. proper name.] 

 incurvus, ^-Newberry, 1857, Proc, Acad. 



Nat. Sci., vol. 8, Coal Meas. [Sig. in- 

 curved.] 

 lancifer, Newberry, 1857, Proc. Acad. Nat. 



Sci. Phil., vol. 8, Coal Meas. [Sig. 



bearing a lance.] 

 occidentalis, Newberry & Worthen, 1866, 



Geo. Sur. 111., vol. 2, Coal Meas. [Sig. 



western.] 

 quadratus, Newberry, 1873, Ohio Pal., 



vol. 1, Coal Meas. [Sig. square-shaped.] 

 reticulatus, Newberry & Worthen, 1870, 



Geo. Sur. 111., vol. 4, Coal Meas. [Sig. 



reticulated, net-work.] 

 Rhynchodus, Newberry, 1873, Ohio Pal., vol. 



1. [Ety. rhynchos, a beak; odous, a 



tooth.] 

 crassus, Newberry, 1873, Ohio Pal., vol. 



1, Corniferous Gr. [Sig. thick.] 

 frangens, Newberry, 1873, Ohio Pal., vol. 



1, Corniferous Gr. [Sig. broken.] 

 secans, Newberry, 1873, Ohio Pal., vol. 1, 



Corniferous Gr. [Sig. divided up.] 

 Rinodus, syn. for Ptyctodus. 



calceolus, see Ptyctodus calceolus. 

 Sandalodus, Newberry & Worthen, 1866, 



Geo. Sur. 111., vol. 2. [Ety. sandalon, 



a sandal ; odous, a tooth.] 

 angustus, Newberry & Worthen, 1866, 



Geo. Sur. 111., vol. 2, Keokuk Gr. [Sig. 



narrow.] 

 carbonarius, Newberry & Worthen, 1866, 



Geo. Sur. 111., vol. 2, Coal Meas. [Sig 



pertaining to coal.] 

 crassus, Newberry & Worthen, 1870, Geo. 



Sur. 111., vol. 4, St. Louis Gr. [Sig. 



thick.] 

 grandis, Newberry & Worthen, 1866, Geo. 



Sur. 111., vol. 2, Keokuk Gr. [Sig. 



large.] 

 laevissimus, Newberry & Worthen, 1866, 



Geo. Sur. 111., vol. 2, Keokuk Gr. [Sig. 



very smooth.] 

 parvulus, Newberry & Worthen, 1866, 



Geo. Sur. 111., vol. 2, St. Louis Gr. [Sig. 



very small.] 

 spatulatus, Newberry & Worthen, 1866, 



Geo. Sur. 111., vol. 2, St. Louis Gr. [Sig. 



spatulate, blade-shaped.] 

 SauHpteris, Hall, 1843, Geo. Rep. 4th Dist. 



N. Y. [Ety. sauros, a lizard ; pteron, 



a wing.] 

 taylori, see Holoptychius taylori. 



