252 The Ganoids 
scales are highly developed. A second species, Dorypterus 
althaust, also from the German copper shales, has been described. 
This species has lower fins than Dorypterus hoff- 
mant, but may be the adult of the same type. 
Dorypterus is regarded by ff Woodward as a spe- 
cialized offshoot from the Platysomide. The 
many-rayed ventrals and the i general form of the 
body and fins suggest affinity i with the Lampride. 
Dictyopygide.—In the Dic- tyopygide (Catoptert- 
de), the body is gracefully iW elongate, less com- 
pressed, the heterocercal tail HHP is short and abruptly 
turned upwards, the teeth ii are sharp and usually 
hooked, and the bony plates qual well developed. Of 
this group two genera are H \ recognized, each con- 
taining numerous species. In 
terus Redfield, not of Agassiz) 
Redfieldius (=Catop- 
the dorsal is inserted 
‘Nii; al 
tHe 
LY 
Ny 
\ 
sty 
Fie. 187.—Dasrypterus hoffmani Germar, restored. (After Hancock and Howse.) 
behind the anal, while in Dictyopyge this is not the case. Red- 
fieldius 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. 
