PISCES. 



237 



hybridus, St. John & Worthen, 1875, 



Geo. Sur. 111., vol. 6, St. Louis Gr. 



[Sig. hybrid; intermediate between 



two species.] 

 linguifer, Newberry & Worthen, 1856, 



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



tongue-bearing.] 

 parvulus, Newberry & Worthen, Carbon- 

 iferous. [Sig. very small.] 

 politus, Newberry & Worthen, Carbon- 

 iferous. [Sig. smooth.] 

 sulcatus, Newberry & Worthen, Carbon- 

 iferous. [Sig. furrowed.] 

 . proximus, St. John & Worthen, 1875, 



Geo. Sur. Ill, vol. 6, Coal Meas. [Sig. 



approaching, near to.] 

 Petalorhynciius, Agassiz, 1855, in British 



Pal. Rocks. [Ety. petalos, spread out; 



rhynchos, a beak.] 

 distortus, St. John & Worthen, 1875, Geo. 



Sur. 111., vol. 6, St. Louis Gr. [Sig. 



distorted, twisted.] 

 pseudosagittatus, St. John & Worthen, 



1875, Geo. Sur. 111., vol. 6, St. Louis 



Gr. [Sig. false sagittatus, a species of 



Petalorhynciius. ] 

 spatulatus, St. John & Worthen, 1875, 



Geo. Sur. 111., vol. 6, St. Louis Gr. 



[Sig. spatulate, blade-shaped.] 

 striatus, Newberry & Worthen, 1866, Geo. 



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



striated.] 

 Petrodus, McCoy, 1848, Ann. & Mag. Nat. 



Hist., 2d series, vol. 2. [Ety. petros, a 



rock ; odom, a tooth.] 

 acutus, Newberry & Worthen, 1866', Geo. 



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



sharp-pointed.] 

 occidentalis, Newberry & Worthen, 1866, 



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



western.] 

 , pustulosus, Newberry & Worthen, 1870, 



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



[Sig. covered with pustules.] 

 Phu.:bodus, St. John & Worthen, 1875, Geo. 



Sur. 111., vol. 6. [Ety. mythological 



name; odous, a tooth.] 

 sophise, St. John & Worthen, 1875, Geo. 



Sur. 111., vol. 6, Devonian. [Ety. 



proper name.] 

 Physonemtis, Agassiz, 1843, Recherches sur 



les Poissons Fossiles. [Ety. physa, a 



bladder ; yieina, a thread.] 

 altonensis, St. John & Worthen, 1875, 



Geo. Sur. 111., vol. 6, St. Louis Gr. 



[Ety. proper name.] 

 carinatus, St. John & Worthen, 1875, Geo. 



Sur. 111., vol. 6, Kinderhook Gr. [Sig. 



keeled.] 

 chesterensis, St. John & Worthen, 1875, 



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



proper name.] 

 depressus, St. John & Worthen, 1875, 



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



[Sig. depressed.] 

 gigas, Newberry & Worthen, 1870, Geo. 



Sur. 111., vol. 4, Burlington Gr. [Sig. 



large.] 



parvulus, St. John & Worthen, 1875, Geo. 



Sur. 111., vol. 6, Keokuk Gr. [Sig. 



very small.] 

 proclivis, St. John & Worthen, 1875, Geo. 



Sur. 111., vol. 6, Kinderhook Gr. [Sig. 



sloping, going downward.] 

 Platyodus, Newberry, 1875, Ohio Pal., vol. 



2. [Ety. platys, broad ; odous, a tooth.] 

 lineatus, Newberry, 1875, Ohio Pal., vol. 



2, Waverly Gr. [Sig. lined.] 

 Platysomus, Agassiz, 1833, Recherches sur 



les Poissons Fossiles. [Ety. platy,% 



broad; soma, body.] 

 circularis, Newberry & Worthen, 1870, 



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



circular.] 

 Pleuracanthus, Agassiz, 1837, Poiss. Foss., 



vol. 3. [Ety. pleura, side ; akantha, 



spine.] 

 arcuatus, Newberry, 1857, Proc. Acad. 



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

 biserialis, Newberry, 1857, Proc. Acad. 



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



having two series.] 

 dilatatus, Newberry, 1857, Proc. Acad. Nat. 



Sci., vol. 8, Coal Meas. [Sig. dilated.] 

 Pnigeacanthus, St. John & Worthen, 1875, 



Geo. Sur. 111., vol. 6. [Ety. from the 



specific name in Oracanthus pnigeiis ; 



akantha, a spine.] 

 deltoides, St. John & Worthen, 1875, Geo. 



Sur. 111., vol. 6, Keokuk Gr. [Sig. 



like the Greek letter Delta."] But why 



should this species not be Pnigeacan- 

 thus pnigeusf 

 PoKciLODUs, Agassiz, 1843, Recherches Poiss. 



Foss., vol. 3. [Ety. poikilos, variegated ; 



odous, tooth.] 

 convolutus, Newberrv & Worthen, 1870, 



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



[Sig. rolled together.] 

 ornatus, Newberry & Worthen, 1866, 



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



[Sig. ornamented.] 

 rugosus, Newberry & Worthen, 1866, 



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



[Sig. wrinkled.] 

 PoLYRHizonus, McCoy, 1848, Ann. & Mag. 



Nat. Hist., 2nd series, vol. 2. [Ety. 



polys, many ; rhiza, root; odous, tooth*] 

 amplus, St. John & Worthen, 1875, Geo. 



Sur. 111., vol. 6, St. Louis Gr. [Sig. 



full-sized.] 

 carbonarius, St. John & Worthen, 1875, 



Geo. Sur. 111., vol. 6, Coal Meas. [Sig. 



pertaining to coal.] 

 dentatus, Newberrv & AVorthen, 1866, 



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



toothed.] 

 littoni, Newberry & Worthen, 1870, Geo. 



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



proper name.] 

 modestus, Newberry, 1875, Ohio Pal., 



vol. 2, Cleveland shale. [Sig. mode- 

 rate.] 

 nanus, St. John & Worthen, 1875, Geo. 



Sur. 111., vol. 6, Keokuk Gr. [Sig. 



dwarfish.] 



