548 Mr. R. W. Hooley on the 



ulnae. Corrections must be made on all the other tablets, as 

 well as in the letterpress and figures o£ ' Ornithosauria ' : — 



Tahlets. 



.]. a. 10*. Distal ends of ulnfe, not " radii." 

 .T. a. 11. Proximal ends of ulnas, not "radii." 

 J. a. 12. Distal ends of radii, not "uluse." 

 J. a. 13. Proximal ends of radii, not " ulnse." 



Letterpress and titles, 'Ornitliosnnria.' 



P. 4.3, /o;- I. Distal end of " Ulna," read Radius. 



P. 44, " Nos. 5 and 6 on another tablet (? tablet J. a. 13) appear to be 



distal ends of ulna." For " ulna " read radius. 

 P. 44, /or II. Distal End of " Radius," read Ulna. 

 P. 46, for IV. Proximal End of " Radius," read Ulna. 



Figures. 



Plata II. Figs. 7, 8, & 9. Proximal ends of rig-bt ulna, not ''radius." 



Plate III. Fig. 1. Ventral view of distal end of left ulna, not " radius." 



Fig. 2. Dorsal view of distal end of left ulna, not " riglit 



radius." 

 Fig. 3. Distal articulation of left ulna, not "right radius." 

 Fig. 10. Distal end of right radius, ?w^ " ulna." 

 Fig. 12. Distal end of left radius, ^mt " ulna." 

 Plate XI. Fig. 7. Specimen J. c. 9, for " palatal aspect of the basi- 



sphenoid bone " read " upper portion of occiput " ; 



the figure is upside down. 

 Fig. 8. Speciuieu J. c. 9, for " etluno-sphenoid mass" read 



left lateral view of posterior moiety of skull of 



OrnifJiostonia. 

 Fig. 9. Specimen J. c. 9, for " posterior aspect of same 



specimen " ?'ead " anterior aspect " ; the " cups " 



are the posterior boundaries of the orbits. 



Radius. 



There are only three specimens of tlie proximal end of the 

 radius and four of the distal, and these are so close in 

 characters that they may be included in one group. 



Proximal end. 



1. Dorsal surface convex, ventral concave. 



2. Preaxial border produced outwards and foi'wards, the 



postaxial straight. 



3. Articular surface, preaxial side, convex looking out- 



wards ; postaxial concave looking proxinuilly. 



4. Moderately compressed dorso-ventrally, width pre- 



2)ostaxially apparently maintained down the shaft. 



* Tliere are eleven examples on this tablet, the eleventh perhaps 

 attached since ' Ornithosauria' was written. 



