CTEN0D0NTID2E. 
O 
55 
Ctenodus murchisoni, Ward. 
[Plate IV. fig. 4.] 
1843. Ctenodus alatus , L. Agassiz, Poiss. Foss. vol. iii. p.-174 (name 
only). 
1844. Ctenodus murchisoni , L. Agassiz, Poiss. Foss. vol. i. p. xxxv 
(name only). 
1890. Ctenodus murchisoni , J. Ward, Trans. N. Staffs. Inst. Mining 
Engin. vol. x. p. 156. 
Type. Palatine dental plate ; British Museum. 
Palatine dental plate attaining a length of about 0*7 and a 
maximum breadth of 0’04, irregularly oval in shape; coronal 
surface more or less concave, with about twenty small, acute, 
coarsely tuberculated ridges, scarcely radiated. 
Form. Sf Loc. Upper Coal-Measures ( Spiro rbis Limestone) : Shrop¬ 
shire and Lancashire. Middle Coal-Measures (Bassey Mine Iron¬ 
stone) : Staffordshire. 
P. 518. Type specimen labelled in Agassiz’s handwriting, shown, of 
the natural size, in PI. IV. fig. 4; Leebotwood. The 
dental plate is of the left side, and the margins towards 
the anterior extremity are much broken. Eyerton Coll. 
The following species has also been described :— 
Ctenodus wagneri, J. S. Xewberry, Palaeoz. Fishes X. America 
(Mon. U.S. Geol. Surv. no. xvi. 1889), p. 172, pi. xxvii. 
fig. 30.—Cleveland Shale (Lower Carboniferous) ; Ohio. 
[Columbia College, Xew York.] 
The following species seems to be founded upon an abraded 
dental plate of Ctenodus :— 
Conchodus plicatus, J. W. Dawson, Acadian Geol. ed. 2 (1868), 
p. 209, fig. 53.—Coal-Measures; Xova Scotia. [Redpath 
A Museum, Montreal.! ^^ Z3<? 
' Genus SAGEWODUS, Owen. 
[Trans. Odontol. Soc. vol. v. 1867, p. 365.] 
Syn. Petalodopsis, W. .T. Barkas, Monthly Rev. Dental Surgery, vol. ii. 
1874, p. 538. 
Ftyonodus, E. D. Cope, Proc. Amer. Phil. Soc. vol. xvii. 1878, 
p. 192. J*» j 
Megapleuron , A. Gaudry, Encliainements du Monde Animal, 
Foss. Primaires, 1883, p. 239. 
Hemictenodm, 0. Jaekel, Sitzungsb. Ges. naturf. Freunde, 1890, 
p. 7 (in part). 
