DESCRIPTION OF PLATES. 



Lettering for all the Plates. 



ang, angular. 

 art, articular. 

 bo, basioccipital. 

 bs, basisphenoid. 

 CI, centrale i. 

 c 2, centrale 2. 

 cl, clavicle. 

 cleit, cleithrum. 

 CO, coracoid. 

 deyit, dentary. 

 epicl, epiclavicle. 

 epiot, epiotic. 

 epipl, epipterygoid. 

 eth, ethmoid. 

 /, frontal. 

 fe, femur. 

 fib, fibulare. 

 il, ilium. 



intcl, interclavicle. 

 bitcr, intercentrum. 

 intp, interparietal. 

 intm, intermedium. 

 isch, ischium. 

 /, jugal. 

 /, lachrymal. 

 mx, maxillary. 

 11, nasal. 

 07-b, orbit. 

 p, parietal. 

 p f, pineal foramen. 

 pas, parasphenoid. 

 prf, prefrontal. 

 pmx, premaxillary. 

 pn, posterior nares. 

 po, paroccipital. 

 proc, procoracoid. 



psq, prosquamosal. 



pt, pterygoid. 



pub, pubis. 



q, quadrate. 



q f, quadrate foramen. 



qj, quadrato-jugal. 



r, radiale. 



.y, sesamoid. 



sq, squamosal. 



st, stapes. 



S771, Sep to-maxillary. 



sura, surangular. 



sp, splenial. 



scap, scapula. 



/, tibia. 



lib, tibiale. 



tc, ulnare. 



Plate i. 

 Fig. I. Left side of skull oi Poliosaurus imiformis, No. 4143 Am. Mus. Nat. Hist. X i. 

 First eight vertebrae of same, left side. X i . 

 First eight vertebrae of same, lower surface. X i. 

 Side view of a sacral of same showing facet for rib. X i- 

 Lower view of same vertebra. X i. 

 6. Upper surface of a lumbar of same showing facets for attachment of neural 



arch. X I. 

 Lateral view of a lumbar of same showing rod-like abdominal scales. X i- 

 A limb bone of same. X i. 

 Upper view of a vertebra of a large species of Poliosaurus, showing shape of 



articular surface for neural arch. X i. 

 Side view of same. X i. 



Upper view of a smaller vertebra of Poliosaurus. X 2. 

 Side view of same. X 2. 



Side view of dorsal vertebrae of /'6'//i?5a?^;7« with neural arches. X i. 

 Lateral view of a vertebra oi Pleuristion brachycalous. X 3. 

 Anterior view of same. X 3. 



Plate 2. 

 Fig. I. lSAg\\t siAe. oi skviW oi Varanosaurus aculirostris. X i- 



2. Upper view of same. X i. 



3. Posterior limb of same. X i. 



4. Posterior lumbar vertebrae of same. X i. 



All figures copied from Broili. 



169 



7- 



10. 

 1 1. 

 12. 



13- 

 14. 



15- 



