2 REPTILES. 



Sect. II. Shielded Reptiles, (Cataphracta). 



Body covered with square imbedded shields. Bones of the 

 skull adglutinated together, hard, with the ear-bone sunk into 

 its substance. Jaws united into a solid mass : mouth not dilata- 

 ble. Vent roundish or linear, plaited. The generative organs 

 simple. 



3. Tortoises, (Chelonians). Body short, depressed. The 

 bones of the thorax external, surrounding the muscles of the 

 body like a case, out of which the head, limbs and tail are pro- 

 truded. Jaws toothless, covered with a homy coat. 



4. Emydosaurians. Body fusiform, covered with square bony 

 plates placed in longitudinal lines. Limbs 4, free. Vent li- 

 near, longitudinal. Jaws with teeth. 



5. Amphisbenians. Body elongate cylindrical, covered with 



square imbedded plates placed in cross rows. Limbs none or 

 verv short, weak. Vent transverse. Jaws, with teeth. 



