REPTILES. 



Sect. TI. Shielded Reptiles, (Cataphracta). 



Body covered witli square imbedded shields. Bones of the 

 skull adglutiuated together, hard, with the ear-bone sunk into its 

 substance. Jaws united into a solid mass : mouth not dilatable. 

 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 horny 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 

 very short, weak. Vent transverse, plaited. Jaws with teeth. 



These orders appear to be analogous to the following orders of 



Mammalia and Birds. 



k 

 Reptiles. 



Lizards Climbers 



Serpents Carnivorous 



Emydosaurians Aquatic 



Tortoises Large-hoofed 

 Amphisbenians — — ? 



