464 PK0F. W. J. SOLLAS ON A NEW SPECIES OF PLESIOSATJPwUS 



Length. Breadth. 

 I. II. III. IV. v. 



i 1-9 25 30 30 31 



ii 1-8 2-5 2-5 2-6 2"45 



iii 2-9 2-1 21 2-5 24 



iv 1-8 1-75 1-95 1-95 2 



v 1-75 2 05 1.7 1-65 1-65 



vi ? 13 165 1-4 14 



vii ? 1-3 12 1-2 1-15 



viii l'O 0-8 1-0 0-45 



ix 0-8 07 06 ... 



1. 



II. 



in. 



IV. 



v. 



1-25 



1-15 



1-35 



1-35 



1-75 





1-35 



1-4 



1-25 



11 



1 ! 2 



1-45 



1-4 



1-5 



1-3 







1-25 



1-25 



10 



i : i5 



115 



1.1 



09 



0-8 





•95 



1-0 



0-8 



0-7 





0-72 



0-72 



0-7 



0-55 





0-55 



045 



0-45 



035 





044 



03 



0-3 





Total length of 1 ? 17 lg 18 . 2 5 16-8 

 fingers J 



The Pelvis. 



A restoration of trie pelvic girdle, obtained in the same way as 

 that of the pectoral arch, is given on PI. XXIII. fig. 4. 



The Pubes (fig. 6). 



These are more or less quadrangular plates, which meet each other 

 in a straight median symphysis along nearly their whole length. 

 The anterior margin is an undulating curve, with a general direction 

 at right angles to the symphysial margin. The posterior margin, at 

 first a little convex, becomes concave for half its length outwards 

 from the symphysis, then almost straight and parallel to the ante- 

 Pig. 6. — Diagram of the Right Pubis and Ischium. (Scale g.) 



rior margin as it articulates with the ischium; finally it curves 

 forwards and outwards, to contribute its share to the acetabulum, 

 and joins the outer margin, which has a slope obliquely outwards as 

 it passes backwards from the anterior margin. 



