422 THE GENERA OF FISHES, PART IV 



Didymodus Cope, 108; orthotype Diplodus gibbosus Ag. (fossil). Substitute for 

 DiPLODUS Ag., preoccupied. Didymodus is regarded as preoccupied by 

 DiDYMODON and again replaced by Dicranodus Garman. But there are 

 apparently older synonyms. These teeth probably belong to the forms 

 called Pleuracanthus or Oracanthus, known from fin-spines only. But 

 it is impossible to coordinate the teeth with the spines, hence the occurrence 

 of two parallel sets of generic names. 



Thoracodus Cope, 108; orthotype T. emydinus Cope (fossil). A synonym of 

 Janassa Miinster. 



1385. COPE (1883). Fourth Contribution to the History of the Permian Forma- 

 tion of Texas. Proc. Amer. Phila. Soc, XX, 628-629. 



Edward Drinker Cope. 

 Gnathorhiza Cope, 629; orthotype G. serrata Cope (fossil). 



1386. COPE (1883). On a New Extinct Genus of Percidcc from Dakota Territory. 

 Amer. Journ. Sci., XXV. 



Edward Drinker Cope. 

 PJioplarchus Cope, 416; orthotype P. whitii Cope (fossil). 



1387. COPE (1883). Permian Fishes and Reptiles. Proc. Acad. Nat. Sci. Phila. 



Edward Drinker Cope. 

 Ectosteorhachis Cope, 69; orthotype E. ciceronius Cope. 



1388. DAMES (1883). Uebcr eine tertidre Wirhelthier-Fauna von dcr westlichen 

 Insel des Birket el Qurun im Fajum (Aegypten). Sitzb. Akad. Wiss. Berlin, 

 VI, 129-152. 



WiLHELM BaRNIM DaMES. 



Propristis Dames, 136; orthotype P. schweinfurthi Dames (fossil). 

 Progymnodon Dames, 148; orthotype P. hilgendorf Dames (fossil). An extinct 

 analogue of Diodon L. 



1389. DAVIS (1883). On the Fossil Fishes of the Carboniferous Limestone 

 Series of Great Britain. Scient. Trans. Roy. Dublin Soc, 1883, II, ser. 1, 

 327-600. 



James William Davis. 

 Compsacanthus Davis, 354; orthotype C. carinatus Davis (fossil). 

 Lispacanthus Davis, 359; logotype L. gracilis Davis (fossil). 

 Gnathacanthus Davis, 363; logotype G. triangularis (fossil). 

 Cladacanthus (Agassiz) Davis, 364; orthotj'pe C. paradoxus Ag. (fossil) (printed 



as name only in Poissons Fossiles, III, 176, 1843). A synonym of Erisma- 



canthus M'Coy (1848). 

 Chalazacanthus Davis, 370; orthotype C. verrucosus Davis (fossil). 

 Carcharopsis (Agassiz) Davis, 381; orthotype C. prototypus Ag. (fossil) (name 



only in 1843). A synonym of Dicrenodus Romanowsky. 

 Glyphanodus Davis, 386; orthotype G. tenuis Davis (fossil). A synonym of 



Petalodus. 

 Rhamphodus Davis, 402; orthotype R. dispar Davis. 

 Diclitodus Davis, 410; orthotype D. scitulus Davis (fossil). 



Tomodus (Agassiz) Davis, 446; orthotype T. convexus Morris & Roberts (fossil). 

 Copodus (Agassiz) Davis, 464; orthotype C. cornutus Davis (fossil). 

 Lobodus (Agassiz) Davis, 468; orthotype L. prototypus Ag. (fossil). A synonym 



of Copodus (Ag.) Davis. 



