CTE.] 



PISCES. 



593 



FIG. 1117. Copodns cor- 

 nutus. Mnndibiilar 

 form, a, Triturating 

 snrfnee; 6, transverse 

 profile; c, longitudinal 

 profile. 1 _. 



pusillup, St. John & Worthen, 1883, Geo. 

 Sur. 111., vol. 7, p. 231, Kaskaskia Gr. 

 vanhornii, St. John 

 & Worthen, 1883, 

 Geo. Snr. 111., 

 vol. 7, p. 229, St. 

 Louis Gr. 



CTKN A c ANTITUS, 

 Agapf-iz, 1843, 

 Rtcherches stir 

 les Poissons Fos- 

 Pilps, t. 3, p. 11. 

 [Ety. ktenos, 



comb ; akanihu, 

 spine.] Fin spine 

 coin pi essed, grad- 

 ually tapering, 

 arch'ed back- 

 ward; anterior 

 face narrow, 

 rounded ; pos- 

 terior face con- 

 cave, lateral 

 edges boidered 

 by two rows of 

 curved denticles 

 inclined down- 

 ward ; surface 

 ridges furrowed, 

 _ peciinated by 

 transverse scales or tubercles; con- 

 cealed base rapidly tapering, finely 

 striated. Type C. tennistriatup. 

 angulatup, Newberry & Worthen, 1866, 

 Geo. Sur. 111., vol. 2, p. 118, Kaskas- 

 kia Gr. 



burlingtonensis, St. John & Worthen, 

 1875, Geo. Sur. Ill,, vol. 6, p. 426, 

 Burlington Gr. 



buttersi, St. John & Worthen, 1883, Geo. 

 Sur. 111., vol. 7, p. 240, Lower Coal 

 Meas. 



cannaliratus, St. John & Worthen, 1883, 

 Geo. Sur. 111., vol. 7, p. 239, Kaskas- 

 kia Gr. 



costalus, see Eunemacanthus costatus. 

 coxanus, St. John & Worthen, 1883, 

 Geo. Sur. 111., vol. 7, p. 233, Keo- 

 kuk Gr. 

 defivxus, St. John & Worthen, 1883, Geo. 



Sur. III., vol. 7, p. 234, St. L^uis Gr. 

 eleuans, Tuotney, 1858, Geo. Ala., p. 38, 



Kaskaskia Gr. 



excavatup, St. John & Worthen, 1875, 

 Geo. Sur. 111., vol. 6, p. 428, Keo- 

 kuk Gr. 

 formosus, Newberry, 1873, Ohio Pal., vol. 



1, p. 328, Waverly Gr. 

 furcicarinatus, Newberry, 1875, Ohio Pal., 



vol. 2, p. 54, Waverly Gr. 

 gemmatus, St. John & Worthen, 1875, 

 Geo. Sur. 111., vol. 6, p. 429, St. 

 Louis Gr. 



gracillimus, Newberry & Worthen, 1866, 

 Geo. Sur. 111., vol. 2, p. 126, St. 

 Louis Gr. 



grado-costatus, St. John & Worthen, 1875, 

 Geo. Sur. 111., vol. 6, p. 425, Burling- 

 ton Gr. 



harrisoni,St. John & Worthen, 1883, Geo. 



Sur. 111., vol. 7, p. 236, St. Louis Gr. 

 keokuk, bt. John & Wort lien, 1875, Geo. 



Sur. 111., vol. 6, p. 427, Keokuk Gr. 

 latispinosus, Whitcav<s, 1881, Can. Nat. 



and Geol., vol. 10, Upper Devonian, 

 maishi, Neubervy, 1873, Ohio Pal., vol. 1, 



p. 326. Coal Mexs. 

 mayi, Newberry & Worthen, 1870, Geo. 



Sur. 111., vol. 4, p. 372, Burlington Gr. 

 parvulus, Newb*rry, 1H75, Ohio Pal., vol. 



2, p. 55, Clev. land s-ale. 

 pellensis, St. John & Woithen, 1883, Geo. 



Snr. 111., vol. 7, p. 237, St. Louis Gr. 

 pugiunculus, St. John & Woithen, 1875, 



Geo. Sur. 111., vol. o, p. 430, St. Louis Gr. 

 sculptus. St. J.-hn & Worlhen, 1875, Geo. 



Sur. 111., vol. 6, p. 421, Waverly or 



Kinderlu ok Gr. 

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



Sur. III., vol. 6, p. 431,Khskfiskia Gr. 

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



Sur. 111., vol. 6, p. 424, Waverly or 



Kinderhook Gr. 

 spectabilis, St. John & Worthen, 1875, 



Geo. Sur. III., vol. 6, p. 420, Waveriy or 



Kinderhook Gr. 

 triangularis, Newberry, 1873, Ohio Pal., 



vol. 1, p. 329, Waverly Gr. 

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



Sur. III., vol. 6, p. 422, Waverly or 



Kindeihook Gr. 



FIG. 1118. Ctenacanthus triaugularis. 



vetustus, Newberry, 1873, Ohio Pal., vol. 



1, p. 32H. Waverly Gr. 

 wiighti, New1>eny,"l884, 35th Rep. N. Y. 



Mus. Nat. Hist,, p. 206, Ham. Gr. 

 CTENODUS, Agapsiz. 1843, Recherch^s stir les 



Poissons Foesilts, t. 3, p. 137. [Ety. 



kteiiot, comb; odou, tooth.] Tooth 



somewhat fan like, with closely ser- 



ratf d edges, very porous and sulcated ; 



position in the jaw unknown. Type 



C. crifrtatiis. 

 dialophus, Cope, 1878, 



Proc. Am. Phil. Soc., 



vol. 17, p. 528, in Pal. 



Bull. No. 29, Permian, 

 fopsatus, Cope, 1877, 



Proc. Am. Phil. Soc., 



p. 54, Permian, 

 gurleianus, Cope, 1877, 



Proc. Am. Phil. Spc., 



p. 55, Permian, 

 ohioensis, Cope, 1874, 



Proc. Acad. Nat. S.i. 



Phil., p. 91, and Ohio 



Pl., vol. 1, p. 410, 



Coal M, as F im .~Cteno- 



penpnon, Cope. 18/8, dus serratiu. 



Pal. Bull. No 29, 



in Proc. Am. Phil. St c., vol. 17, p. 527, 



Permian. 



