i6 



The Ganoids 



scales are highly developed 

 althausi, also from the German 

 This species has lower fins 

 mani, but may be the adult 

 Dorypterus is regarded by 

 cialized offshoot from the 

 many-rayed ventrals and the 

 body and fins suggest affinity 

 Dictyopygidae. In the Dic- 

 da], the body is gracefully 

 pressed, the heterocercal tail 

 turned upwards, the teeth 

 hooked, and the bony plates 

 this group two genera are 

 taining numerous species. In 

 terns Redfield, not of Agassiz) 



A second species, Dorypterus 

 copper shales, has been described, 

 than Dorypterus hoff- 

 of the same type. 

 Woodward as a spe- 

 Platysomidcs. The 

 general form of the 

 with the Lamprida. 

 tyopygidcB (Catopteri- 

 elongate, less corn- 

 is short and abruptly 

 are sharp and usually 

 well developed. Of 

 recognized, each con- 

 Redfieldius ( = Catop- 

 the dorsal is inserted 



FIG. 4. Dorypterus hoffmani Germar, restored. (After Hancock and Howse.) 



behind the anal, while in Dictyopyge this is not the case. Red- 

 fieldins gracilis and other species are found in the Triassic of 

 the Connecticut River. Dictyopyge macrura is found in the same 

 region, and Dictyopyge catoptera and other species in Europe. 



