CHOXDRdSTEIDiE . 
39 
Viewed from the front and below, it appears as if the 
palatine bone were fused with the maxilla, as sometimes 
occurs in Acijoenser. Enniskillen Coll. 
43304. Ceratohyal, shown of one-third the natural size in fig. 13, 
described and figured loc. cit. pp. 33, 35, fig. 3. 
Purchased , 1871. 
P. 2262 C. Finer example of the same bone, labelled “ Gyrosteus 
mirabilis, Ag.” by Agassiz, shown of one-third the natural 
size in fig. 12, described and figured, ibicl. 
Egerton Coll. 
Ceratohyals of Gyrosteus mirabilis, one-third nat. size. 
[Nos. P. 2262 c. 43304.] 
