CH0NDR0STEIDJ3. 37 
\ 
a. Fig. 9. b. 
Right hyomandibular of Ghyrosteus mirabilis, lateral aspect (a), and 
posterior aspect (b), one-third nat. size. [No. P. 3356 a.] 
P. 33561. Left maxilla, shown of one-quarter the natural size from 
the outer, anterior, and inferior aspects in fig. 10. It 
differs from the corresponding bone of the recent Aci- 
jpenser (fig. 11) in the relatively greater steepness of the 
anterior border, and in the straightness, shortness, and 
posterior expansion of the hinder half of the element. 
