Il POUCH I 
un 
In the Marsupials the pouch shelters the young, which are 
born ‘in an exceedingly imperfect state, minute, nude, and blind, 
with a “larval” mouth fitted only to grasp in a permanent 
fashion the teat, upon which they are carefully fixed by the 
parent. But even later the pouch is made use of asa temporary 
harbour of refuge: from the pouch of female Kangaroos at the 
Zoological Gardens may frequently be observed to protrude the tail 
Fic. 3.—Echidna hystrix. A, Lower surface of brooding female ;_B, dissection showing 
a dorsal view of the pouch and mammary glands ; tt, the two tufts of hair in the 
lateral folds of the mammary pouch from which the secretion flows. 4.2m, Pouch ; 
el, cloaca; g.m, groups of mammary glands. (From Wiedersheim’s Com ti 
Anatomy, after W. Haacke.) 
and hind-legs of a young Kangaroo as big as a Cat, and perfectly 
well able to take care of itself. 
In the Monotremata (Gn Fehidna) there is a deep fold of 
the skin which lodges the unhatched egg, and into which the 
Inammary glands open, one on either side. This structure is only 
periodically developed, and arises from two rudiments, one corre- 
sponding to each mammary area ; but in the female with eggs or 
young there is but a single deep depression, which occupies the 
same region of the body as the marsupial pouch of the Mar- 
