EEE NIT TT 
AND SUPPOSED EAR-BONES OF CTENODUS. 53 
nee hich: covered rei petal +The ate aol ot 
argent Dipterus, Asterolepis, Osteolepis, Coccosteus ge rey 
which baie: the xed proper of osseous fishes. All piped to 
classify them, therefore, can only be approximate; and, followin 
as closely as I am able the plan of lemuhcaiien furnished by Prof. 
uxley, I venture to indicate the following omological relation, 
od in between them. The cranial ae of ir per- 
haps most closely approach those of Ctenodus, but i 
the parietals are between the occipital and frontal, wig are in 
close contact with each other, while in Ctenodus the parietals are 
separated from each other by the width of the broad occipital 
plate.” The groups of cranial bones mentioned ate Mises 
ted in t . Att 
pitals, parie’ 
ae posterior or lateral or skin bones, and dhe ie that at thete Sones 
the same bones in erus 
on they might be ‘tnkear:t to belong toa gigantic —— of that 
genus”; but on this point it will be noticed that Mr. nes a 
ence between these two fishes in the arran arrangement of the occi ital 
a Dipterus having the parietals between those 
