684 



PHYLUM CHORDATA : CLASS REPTILIA 



First Order : Rhynchocephalia 



The only living representative of this order is the 

 New Zealand " Lizard " or Tuatara — Sphenodon {H attend) 

 punctatus. Lizard-like in appearance, it measures from 



Fig. 394. — Fcetal mem- 

 branes in Amniota. — 

 After Roule. 



I. Vertical Section. 

 TI. Surface View of 

 Intact Membranes. 



1, Sub-zonal membrane ; 



2, yolk-sac ; 



3, allantois ; 



4, amnion ; 



5, amniotic cavity ; 



6, archenteron ; 



7, body of embryo. 



one to two feet in length, has a compressed crested tail, 

 is dull oHve-green spotted with yellow above and whitish 

 below. It is now rare, but is preserved in some small 

 islands off the New Zealand coast. It lives in holes among 

 the rocks or in small burrows, feeds on small animals, 

 and is nocturnal in habit. 



