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J. P. HILL AND OHAS. H. o’dONOGHUI]. 
appearing as a low columnar epithelium with close-set nuclei, 
plump and rich in chromatin. The uterine glands (’04- 
•05 mm. in diameter) are well convoluted, luminated through- 
out, and ciliated. The connective tissue is markedly oede- 
matous in the superficial half of the mucosa, and particularly 
rich in leucocytes; in the deeper part of the same, between 
the basal coils of the glands, it is more cellular. Below the 
uterine epithelium there is the usual compact zone of con- 
nective tissue, which is rich in leucocytes and fairly vascular. 
Case 2 (No. 13, 25 . vii . ^02). — Female killed four days after 
final copulation, with 1 and 2-celled ova and abnormals 
in the uteri. The uterus is essentially similar to that of 
Case 1. Mitoses in the uterine and glandular epithelium are 
not infrequent. 
The Nursing Period. 
Parturition in mammals is followed by a period termed b}^ 
Heape ( 11 ) the nursing period,^^ during which the young are 
nourished by the milk secreted in the mammary glands of 
the mother. As is known, there is a noteworthy difference 
in the way in which the milk is obtained by the young in the 
Eutberia and Metatheria. In the former the young are per- 
fectly free and seek the teat of the mother, from which they suck 
the milk. The new-born marsupial, on the other hand, which 
is brought forth in a much less advanced condition than the 
Eutheriau, is transferred to the pouch, presumably by the 
mother with the aid of her lips, and becoming fast to a teat, 
the milk is pumped down its throat. 
The nursing period in the marsupial falls into two distinct 
phases ; 
(1) A period of fixation, during which the lips of the 
young one are fused in such a manner that it is firmly attached 
to the teat, which it cannot leave. During this period the 
milk is said to be forced periodically into its mouth by the 
contraction of the muscles of the pouch area of the parent. 
This period in Dasyurus lasts from seven to eight weeks ( 13 ). 
