238 



PISCES. 



piasaensis, St. Jolm & 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. 



ISur. Ill, 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.] 

 Pkistkladodus, McCoy, 1855, British Pal. 



Rocks. [Ety. from the two genera 



Pristix and Cladodits.^ 

 springeri, St. John & Worthen, 1875, 



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



[Ety. proper name.] 

 Pristodus, Agassiz. [Et)'. pristh, a saw ; 



udous, 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. [Et}'. psammos, 



sand ; odous, tooth.] 

 angularis, Newberry & AVorthen, 1866, 



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



angular.] 

 antiquus, Newberry, 1853, Annals of 



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



Inst., Corniferoua 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, Newberrv & Worthen, 

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

 Gr. [Sig. half cylindrical.] 

 PsEPHODus, Agassiz. [Ety. psephoa, a peb- 

 ble; odoits, a tooth.] 



reticulatus, St. John & AVorthen, 187.i, 

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

 [Sig. reticulated, like net work.] 

 Pterichthys, JMiller, 1840, in British Rep. 

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



norwoodensLS, Owen, ]84(), Am. Jour. 

 Sci., 2nd series, vol. 1, Up. Pleld. 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.] 



Pygopteeus, 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.] 



RiiizoDus, Owen, 1840, Odontography. [Ety. 

 ■r!nza, 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. 

 Vjearing 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.] 

 Rhynchodds, Newberry, 1873, Ohio Pal., vol. 

 1. [Ety. rhyncJws, 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.] 

 fliiiodiiK, 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, Newberrv & Worthen, 1866, 

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

 pertaining to coal.] 

 crassus, Newberry & AVorthen, 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, Newberrv & Worthen, 1866, 

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

 very smooth.] 



parvulus, Newberry & Worthen, 1866, 

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

 very small.] 



spatulatus, Newberry & AVorthen, 1866, 

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

 spatulate, blade-shaped.] 

 Saniijit, lis, HaW, 1843, Geo. Rep. 4th Dist. 

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

 a wing.] 

 laylori, see Holoptychius taylori. 



