156 



SAUROPTERYGIA. 



the pectoral and pelvic girdles, and a portion of the pelvic 

 limb. The scapular region of the pectoral girdle shown in 

 fig. 48 is drawn from a specimen in the possession of 

 A. N. Leeds, Esq., of Eyebury near Peterborough. The 

 upper teeth are in beautiful preservation. Specimens in 



Eig. 53. 



Peloneustes philarchtcs.— The pubes of No. E. 1253. Eeduoed. 

 a, acetabular facet. 



Fig. 54. 



Peloneustes philarchus and csqualis. — The ischia. The right side of the figure 

 is from No. E. 1253 ; and the left side from No. 47325 (p. 153) of 

 P. csqualis. a, acetabular facet. The median process for junction with 

 the pubes is not indicated. 



{This and the preceding figure are from the ' Quart. Joum. Geol. Soc.') 



Mr. Leeds's collection show that the ischia and pubes 

 meet to enclose an obturator foramen, as in Plesiosaurus. 

 The dimensions of the ulna (fig. 52) are : length 0,094 

 (3*7 inches), width 0,091 (3*6 inches) ; and those of the 



