MONOTRKMATA. 
to 
In. Lines. 
Total length ... ... ... . 15 0 
Width of body, about . . 7 f> 
Length of the naked snout ... . 1 0} 
Width of ditto at the base ... ... ... ... 0 8 
•* near the apex ... ... ... 0 3§ 
Distance from the angle of the mouth to the apex of snout 0 4$ 
Length of the fore foot, including the nails ... 1 0 
Width of ditto . .. 1 9 
Length of the nail of the middle finger . I 0 
Width of ditto . 0 4J 
Length of hind foot, not including the nails ... 1 I 
Width of ditto ... ... .. 1 34 
Length of longest nail (that on the innermost toe but one) I 9 
Length of nail of little toe ... ... ... ... 0 6 
From the eye to the tip of the muxxle . 2 1 
The nostrils are situated on the upper surface of the muzzle, 
very near the tip, being about of an inch distant from that 
point, and are in the form of narrow openings of -fc of an 
inch in length; they nearly meet posteriorly, and diverge 
slightly in front, being here separated by about | of an inch, 
or rather more. The tongue, which is very slender, pointed, 
and nearly cylindrical (but slightly depressed), was protruded, 
and could be with ease drawn out of the mouth to the distance 
of more than three inches. 
The head and feet of a female specimen of the Echidna 
setosa are represented, of the natural size, in Plate 2. 
Fig. 7. The fore part of the head viewed from the side. 
“ 8. The fore foot viewed from above: a , the thumb or inner toe. 
44 9. The hind foot viewed from beneath: o, the inner toe. 
