Related to the sinuses. It could be called the labyrinth, turbinate, can't remember. Generally animals with a decent sense of smell have them.
"long nose contains a labyrinth of thin bones, called turbinates, which are all lined by an epithelium. This provides a very large surface area for the air breathed to pass over. In the anterior part of the nose the bones are known as maxillo-turbinates, and they are lined by a respiratory type epithelium producing mucus.
It is in the posterior part of the nose containing ethmoid turbinates that the lining epithelium is olfactory in type and this contains the 300 million olfactory receptors, or neurones, needed to recognise the odour molecules. The neurones need maximum contact with the air containing the odour molecules and therefore have hair like projections - or cilia. In mammals it is thought that each olfactory receptor cell only expresses one single odorant receptor gene. [4]
http://www.medicaldetectiondogs.org.uk/anatomy.html 
