76 



PISCES 



CLASS I 



divided distaily, and the caudal obliquely truncated. Teeth small. Scales 



rugose, denticulated on the hinder 

 border ; two or more rows of 

 scales on the flank remarkably 

 deepened. Coal Measures ; Ohio, 

 and rarely England. 



Nematoptych ius, Bhadinichthy?, 

 Traquair ; Cycloptychius, Young. 

 Carboniferous. 



Pygopterus, Ag. Kupfer- 

 schiefer. 



Palaeoniscus, Blv. emend. Tra- 

 quair (Fig. 136). Slender fishes, 

 small or of moderate size. Teeth 

 sharply pointed, of different sizes. 

 Fins small, the ravs articulated 

 and divided distally. Dorsal in 

 front of the anal fin. Scales rhombic, marked with irregular oblique furrows. 



Km 



Fig. 135. 



ylepis tuberculatus, Newb. Coal Measures ; 

 Linton, Ohio. 



Fig.136. . 



■ Palaeoniscus macropomus, Ag. Restora- 

 tion of head (^4), pectoral arch (B), and 

 caudal fin (C). Natural size. Kupfer- 

 schiefer ; Thuringia. «/, Anterior frontal ; 

 ag, Angular ; br, Branchiostegal rays ; el, 

 clavicle ; d, Dentary ; e, Ethmoid ; /, 

 Frontal ; id, Infraclavicle ; top, Suboper- 

 culum ; mx, Maxilla; n, Narial opening; 

 op, Operculum ; p, Parietal ; pel, Post- 

 clavicle ; pop, Preoperculum ; pt, Post- 

 temporal ; jmix, Premaxilla ; q, Squa- 

 mosal ; sd, Supraclavicle ; so, Circum- 

 orbital ring and suborbitals ; st, Supra- 

 temporal. Dotted lines indicate course of 

 sensory canals (after Traqnair). 



P. Jreieslebeni, Blv. (Fig. 136), and other species very common in the Kupfer- 



