CTE.] 



PISCES. 



5i)3 



rij.h 



Fig. 1117.— Copodus cor- 

 nvitus. Mandibular 



form, a, Triturating 

 surface; b, transverse 

 profile; e, longitudinal 

 profile. 



pusilhis, St. John & Worth™, 1883, Geo. 

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

 vanhornii, St. John 

 & Worth en, 1883, 

 Geo. Sur. III., 

 vol. 7, p. 229, St. 

 Louis Gr. 

 Ctena canthus, 

 Agassiz, 1843, 

 Recherches sur 

 les Poissons Fos- 

 siles, t. 3, p. 11. 

 [Ety. ktenos, 



comb ; akantha, 

 spine.] Fin spine 

 compressed, grad- 

 ually tapering, 

 arched back- 

 ward ; anterior 

 face narrow, 



rounded ; pos- 

 terior face con- 

 cave, lateral 

 edges bordered 

 by two rows of 

 curved denticles 

 inclined down- 

 ward ; surface 

 ridges furrowed, 

 pectinated b y 

 transverse scales or tubercles ; con- 

 cealed - base rapidly tapering, fin e iy 

 striated. Type C. tenuistriatue. 

 angulatus, 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. 

 costatus, see Eunemacanthus costatus. 

 coxanus, St. John & Worthen, 1883, 

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

 kuk Gr. 

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



Sur. 111., vol. 7, p. 234, St. Louis Gr. 

 elegans, Tuomey, 1858, Geo. Ala., p. 38, 



Kaskaskia Gr. 

 excavatus, St. John & Worthen, 1875, 

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

 kuk Gr. 

 foruiosus, 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. 

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



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

 latispinosus, Whiteaves, 1881, Can. Nat. 



and Geol., vol. 10, Upper Devonian, 

 marshi, Newberrv, 1873, Ohio Pal., vol. 1, 



p. 326, Coal Meas. 

 mayi, Newberry & Worthen, 1870, Geo. 



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

 parvulus. Newberry, 1875, Ohio Pal., vol. 



2, p. 55, Cleveland shale, 

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



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

 pugiunculus, St. John & Worthen, 1875, 



Geo. Sur. 111., vol. 6, p. 430, St. Louis Gr. 

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



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



Kinderhook Gr. 

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



Sur. 111., vol. 6, p. 431,Kaskiiskia Gr. 

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



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



Kinderhook Gr. 

 spectabilis, St. John & Worthen, 1875, 



Geo. Sur. 111., vol. 6, p. 420, Waverly or 



Kinderhook Gr. 

 triangularis, Newberry, 1873, Ohio Pal., 



vol. 1, p. 329, Waverly Gr. 

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



Sur. 111., vol. 6, p. 422, Waverly or 



Kinderhook Gr. 



Fig. 1118.— Ctenacanthus triangularis.' 



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



1, p. 326. Waverly Gr. 

 wiighti, Newberry, 1884, 35th Rep. N. Y. 



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

 Ctenodus, Agassiz, 1843, Recherches sur les 



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



ktenos, comb; odous, tooth.] Tooth 



somewhat fan like, with closely ser- 

 rated edges, very porous and sulcated ; 



position in the jaw unknown. Type 



C. cristatus. 

 dialopiius, Cope, 1878, 



Proc. Am. Phil. Soc, 

 . vol. 17, p. 528, in Pal. 



Bull. No. 29, Permian, 

 fossatus, Cope, 1877, 



Proc. Am. Phil. Soc, 



p. 54, Permian, 

 gurleianus, Cope, 1877, 

 , Proc. Am. Phil. Soc, 



p. 55, Permian, 

 ohioensis, Cope, 1874, 



Proc. Acad. Nat. Sci. 



Phil., p. 91, and Ohio 



Pal., vol. 1, p. 410, 



Coal Meas FlG , K __ cteuo . 



penpnon, Cope, 1878, dus terrain*. 



Pal. Bull. No 29, 



in Proc. Am. Phil. S< c, vol. 17, p. 527, 



Permian. 



