Vroc. Roy. Socy. of Edin. ] 
[Yol. XXVII. 
Fig. 1 . — Uterus of Young Hat, net. 10 weeks, Bread-and-Milk-fed. (x30. ) 
Fig. 2. — Uterus of Young Rat, pet. 10 weeks, Meat-fed. From same litter as fig. 1. 
( x 30. ) 
Mr Malcolm Campbell. 
[Plate I. 
