312 



ORDER XII. 

 MONOTREMATA. 



THIS is likewise treated in detail in the Volume 

 already mentioned. We give only the figure of a 

 species, we believe not hitherto published, of 



PLATE XXX 



Echidna setosa, 



ONE nearly allied to Echidna hystrix, but with the 

 snout still more slender, the spines fewer and hid 

 within the fur ; we believe, always destitute of spurs 

 on the hind feet. ORNITHORYNCHUS forms the only 

 other genus of this order. 



THUS we terminate the Introduction to the Mam- 

 malia, wherein it has been found necessary to refer 

 to the Volumes of the Naturalist's Library for those 

 orders, genera, and species, which are therein de- 

 scribed at length : we have likewise abbreviated, or 

 treated summarily, groups which presented less in- 



