PISCES. 



Bathycheilodus, St. John & Worthen, 1875, 



Geo. Sur. 111., vol. 6. [Ety. bathys, 



deep; cheilos, lip; odous, tooth.] 

 macisaacsi, St. John & Worthen, 1875, 



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



proper name.] 

 Bythiacanthus, St. John & Worthen, 1875, 



Geo. Sur. 111., vol. 6. [Ety. bythios, 



deep ; akantha, a spine.] 

 siderius, Leidy, 1873, (Asteracanthus 



siderius) Ext. Vert. Fauna, Low. 



Carb. [Sig. starred.] 

 vanhornei, St. John & Worthen, 1875, 



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



[Ety. proper name.] 

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



Sur. 111., vol. 6. [Sig. a shoemaker's 



last.] 

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



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



sharp-pointed.] 

 Carchakopsis, Agassiz, 1843, Recherches 



sur les Poissons Fossiles. [Ety. car- 



charopsis, shark -like.] 

 wortheni, Newberry, 1866, Geo. Sur. 111., 



vol. 2, Low. Carb. [Ety. proper name.] 

 Catopterus, Redfield, 1841, Annals N. Y. 



Lyceum, vol.. 4. [Ety. kata, on the 



lower side ; pteron, a fin.] 

 macrurus, Redfield, 1841, Am. Jour. Sci., 



vol. 41, Carboniferous. [Sig. large- 

 finned.] 

 Cephalaspis, Agassiz, 1835, Recherch. Pois. 



Foss. [Ety. kephale, head; aspis, a 



shield.] 

 dawsoni, Lankester, 1870, London Geo. 



Mag., Devonian. [Ety. proper name.] 

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



Hist. [Ety. cfieir, the hand; odous, 



tooth.] 

 acutus, Newberry, 1857, Proc. Acad. Nat. 



Sci., vol. 8, Coal Meas. [Sig. sharp- 

 pointed.] 

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



Sur. 111., vol. 6. [Ety. cholos, defec- 

 tive; odous, tooth.] 

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



Sur. 111., vol. 6, Coal Meas. [Sig. un- 

 equal.] 

 Chomatodus, Agassiz, 1838, Recherches sur 



les Poissons Fossiles. [Ety. choma, a 



pile or heap ; odous, tooth.] 

 affinis, Newberry & Worthen, 1866, Geo. 



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



near to.] 

 angularls, see Tanaodus angularis. 

 arcuatus, St. John, 1870, Proc. Am. Phil. 



Soc, vol. 2, Coal Meas. [Sig. arched.] 

 chesterensis, St. John & Worthen, 1875, 



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



proper name.] 

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



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



elegant.] 

 costatus, Newberry & Worthen, 1866, Geo. 



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



ribbed.] 



cultellus, Newberry & Worthen, 1866, 



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



a small knife.] 

 elegans, Newberry & Worthen, 1866, Geo. 



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



elegant.] 

 ffracillimw, see Tanaodus gracillimus. 

 inconstans, St. John & Worthen, 1875, 



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



[Sig. not constant in form or size.] 

 incrassatus, St. John & Worthen, 1875, 



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



[Sig. thickened.] 

 insignis, Leidy, 1856, Trans. Am. Phil. 



Soc., vol. 11, St, Louis Gr. [Sig. 



marked.] 

 linearis, Agassiz, 1838, (Psammodus line- 

 aris) Recherches Pois. Foss., Low. 



Carb. [Sig. lined.] 

 loriformis, Newberry & Worthen, 1866, 



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



[Sig. like a thong or whip.] 

 molaris, Newberry & Worthen, 1866, Geo. 



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



a molar or grinder.] 

 multiplicatus, see Tanaodus multiplicatus. 

 obscurus, see Tanaodus obscurus. 

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



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



parallel.] 

 pusillus, Newberrv & Worthen, 1866, 



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



very small.] 

 varsoviensis, St. John & Worthen, 1875, 



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



[Ety. proper name.J 

 venustm, Leidy, see \enustodus leidyi, 



where the specific name is made to 



designate the genus, and the author 



the specific name, contrary to the 



rules of nomenclature; also see Venus- 



todus venustus. 

 Cladodus, Agassiz, 1843, Recherches sur les 



Poissons Fossiles. [Ety. klados, a 



twig; odous, tooth.] 

 acuminatus, Newberry, 1857, Proc. Acad. 



Nat. Sci. Phil., vol. 8, Low. Carb. [Sig. 



sharp-pointed; from the extreme 



sharpness of the central and lateral 



denticles.] 

 alternatus, St. John & Worthen, 1875, 



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



[Sig. alternating.] 

 ^hgulatus, Newberry & Worthen, 1866, 



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



[Sig. angular.] 

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



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



war-like, martial.] 

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



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



keeled.] 

 concinnus, Newberry, 1875, Ohio Pal., 



vol. 2, Portage Gr. [Sig. handsome.] 

 costatus, Newberry & Worthen, 18 66, 



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



ribbed, having prominent ridges.] 



