In reptiles, the nasal chamber is generally Larger.

http://en.wikipedia.org/wiki/Nose

 In reptiles, the nasal chamber is generally larger, with the choanae being located much further back in the roof of the mouth. Incrocodilians, the chamber is exceptionally long, helping the animal to breathe while partially submerged. The reptilian nasal chamber is divided into three parts: an anterior vestibule, the main olfactory chamber, and a posterior nasopharynx.