594 



PISCES. 



[CTE.— DAC. 



porrectus, Cope, 1878, Pal. Bull. No. 29, 

 in Proc. Am. Phil. Sue, vol. 17, ]>. 527, 

 Permian, 

 puollus, Cope, 1878, Pal. Bull. No. 2G, in 

 Pr. e. Am. Phil. Soc, vol. 17, p. 191, 

 Permian. 

 reticulat us, Newberrv, 1875, Ohio Pal., vol. 



2, p. 60, Coal M« as. 

 serrains, Newberry, 1875, Ohio Pal., vol. 

 2, p. 59, Coal Meas. 

 CTENophT.u.rs, Agassiz, 1809, Catal. F«'8<». 

 Fish, Collection of Karl of Ivmiskillen, 

 in Ceo. Matr., v«»l. 6. [Kty. ktm>m, 

 comh j i>et<tl< s, broad, full-grown ] The 

 6etrated or denticulated crest distin- 

 guishes it from Petalodus, \vhi< h it 

 much resembles, and 10 which it hears 

 about the fame rtlation as I'etalodus 

 does to Antli this. Type C. serratu-*. 

 bellulus, St. John & Wt.nhen, 187. r >, Geo. 



Sur. III., vol. 6, p. 398, St. Louis Or. 

 liniiiu.iH, St. John & WiMthen, 1875, 

 Geo. Sur. 111., vol. 6, p. 399, Kaskas- 

 kia Gr. 



merlin?, St. John & 

 Wort'ien, 1875, Geo. 

 Sur. 111., v-.l. 6, p. 400, 

 Kai-ka.-kia Gr. 

 occidentals, St. John & 

 AVorihen. 1875, G--o. 

 Sur. 111., vol. 0, p. 401, 

 Coal Meas. 

 vinosus, St. John & 

 Worthen, 1875, Geo. 

 Pur. III., vol. G, p 39(5, Ke.,kuk Gr. 

 Ctenoptyciiius, Agasdz, 1843, lt> eherches 

 Mir Its I'-.issons Fossil's, t. 3, p. 99. 

 [Bty. klfnos, comb; ptgehe, wrinkl-] 

 'iVeih i-niall, highly p dt.-h< d, strongly 

 cornprvMtd, round* d or obtusely 

 pointed ; edge divided into BeVertl 

 Btroig dentirulatioiis; base of crown 

 witli a few imbricating folds of ginoine ; 

 b >ny root, oblong, ilittened in the 

 same direction as the crown. Type C. 

 apicalis. 

 cristatus, Dawson, 1868, Acad. Geol , p. 

 209, Coal Meas. 



Fio. 1120. — Oteno- 

 peialus (.ccident- 

 nIIm, Concave 

 face. 



Fig. 1121. — CtenoptyHiiusrri tatus. Natural i>ize 

 mid liiiignilied. 



dijntatus, Lei«ly, 1856, Trans. Am. Phil. 



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

 pn'tenuis, St. John <fe Wort.hen, 1875, 



Geo. Sur. 111., vul. 6, p. 382, KaskfaS- 



kia Gr. 

 8emicirtularis, see Peripristis semicircu- 



laiis. 



Btevensoni, St. John & Worthen, 1875, 

 Geo. Sur. 111., vol 6, p. 383, Coal M-as. 

 Cym\todus. Newberrv <k Worthen, 1870, 

 Geo. Sur. 111., vol. 4, ]>. 3(13. fEty. 

 cymatos, wavy; o-lous, tooth.] Teeth 

 small, oblong, or elliptical, thin, form- 

 ing a fl dor arched | lite, of which the 

 crown surf ice is transversely umlu- 

 b ted and uniformly punctate; under 

 surface Hat, smooth, at the posterior 

 end b aring a narrow, strap-shaped, 

 ohhque root. Type C ohlnnguft. 



oblonaus, Newberrv & Worthen, 1870, 

 Geo. Sur. III., voi. 4, p. 361, Up. Coal 

 Meas. 





t,i. 



\ 



\IY5 

 Cyrtacantjius, Newberry, x 

 1873. Uhto Pal., vol. 1, 

 p. 306. [K«y. ktntuH, 



carved ; akautha, spun .] 



Spine euivetl, tutnrcu- 



laied, single row of con- 

 ical detittch s set on the 



posterior side, limited to 



the upper portion, and 



increas.ng in size from 



below u p ward. Type 



C. dental us. 

 dental us, Newberry, 1873, 



Ohio l'al., vol. 1, p. 307, 



Up. Held. Gr. 

 Da en loo us, Newberry & 



Woitien, 1866, Geo. 



Sur. 111., vol. 2, p. 33. 



[Lty. dttliylo*, linger; 



oduux, lootn.] Crown 



as in Petaloous; root 



con-picuous, ami di- 

 vided into a nuniher of 



radicles. Type D. prin- 

 ce ps. 

 coneavus, St. John & 



Woith-n, 1875, Geo. 



Sur. 111., vol. 6, p. 390, 



Si. Louis Gr. 

 exeavatus, St. John & 



Geo. Sur. 111., vol. 6, 



kia Gr. 

 inhVxus, Newberry & 



Wort 1 1< n, 18(i6, Geo. 



Sur. 111., vol. 2, p. 



48, Kaskaskia Gr. 

 lohatus, Newberry & 



Wort hen, 186(>, Geo. 



Sur. 111., vol. 2, p. 



47, St. Louis Gr. Fia n 2 .r - Dnetylo- 

 niimmus, St. John & dun cmcavus. Oou- 



W on hen, 1875, Geo. vex lilce - 



Sur. HI., vol. 6, p. 391, St. Louis Gr. 

 princt ps, Newberry & Worthen, 1866, 



Geo. Sur. 111., vol. 2, p. 45, St. Louis Ur. 



Fin. i] 22.— Cyrta- 

 cauthus denta- 

 tus. 



Worthen, 1875, 

 p. 392, Kaskas- 



