29G CATALOGUE OF THE SPECIES OF VERTEHKATA FOUND IN THE 



Besides the skull, the vertebrge and the ribs, I cannot yet positively identify the 

 skeleton of this species. 



Measurements. M. 



No. 1. (Skull.) 



Depth of muzzle at sixth tooth from last, •1'''2 



Length of skull posterior to same tooth, -SSS 



(■anteroposterior, -057 



Diameters of orbit -< . , „-„ 



(vertical, •"O" 



Vertical depth from line of eyebrow to end of quadrate, .200 



Width of condyles of quadrate, -050 



( vertical, .038 



Diameters of crown of sixth tooth X anteroposterior, .014 



( transverse, .011 



Thickness of maxillary bone at sixth tooth, .032 



No. 3. (Vertebra', probably of No. 1.) 



\ anteroposterior, .064 



Diameters of dorsal neural arch, with zygapophyses -, , ' . ^ 



(transverse (posterior) 



Diameters of neural spine near base \ 



(transverse, 



( anteroposterior, 

 Diameters neural spine at process < 



.036 



f anteroposterior, . 033 



base -! 



037 



No. 3. (Vertebrae) 

 anteroposterior, .039 



Diameters centrum dorsal vertebra •< transverse, .034 



I. vertical, -035 



Expanse prezygapophyses do., .041 



" diapophyses do., .083 



Elevation of neural spine to first process, .034 



Transverse diameter of process, -025 



.030 



(transverse, .038 



Length of the two sacral vertebra;, .084 



Elevation of neural canal of do., .010 



" " " spine of do., .084 



Length of rib on outside of curve, .360 



" head of rib, .045 



Transverse diameter of rib just beyond tubercle, .017 



Anteroposterior do., .020 



?SPUR OF A PELYCOSAURIAN. 



In Plate 111, fig. 7, is represented the basal part of a bone which has the form 

 and characters of a mctapodial of one of the Clepsydropida\ It diftbrs from all of 

 these which have come under my notice in the l)urred or serrate character of the bor- 

 der of the proximal extremity. I do not know of any genus which is likely to have 

 such a mctapodial of the usual series. The lirst of the series, which articulates with 



