CETACEA—LILLIE. 103 
manner of an ordinary mammal, because there is a complete absence of air in its 
mouth at any time. 
When the mother feels the lips of her calf at her teat she pumps a supply of milk 
into its mouth. It is said that the calf holds the teat in the angle of the mouth near 
the eye. 
A whaling captain told me that he once shot a female Balaenoptera physalus 
Linn. when im the act of giving suck to her calf. After death the ventral surface 
turned upwards, as it always does, and the nipple-grooves were seen to be protruded. 
On inflating the whale with air, in order to render it more buoyant for towing home, 
two jets of milk from either breast rose into the air, like small fountains ; some of the 
milk was collected in pans. The amount of milk which issued from this animal was 
estimated at 18 or 20 gallons. The discharge of milk, in this case, was evidently due to 
the pressure of air within the body-cavity causing the tissues of the abdominal wall 
to tighten, and so squeezing out the contents of the mammary glands. 
TITIAN 
{HL 
Fic. 9.—Sagittal section through mammary gland and adjacent structures of a 
Humpback: A, nipple; B, blubber; C, compressor muscle of gland ; 
D, substance of mammary gland; E, its central canal; F, muscles of body- 
wall; G, body-cavity. 
The milk was like thin cream in appearance, and has been used for cooking 
purposes by whalers. When eaten raw it has a slightly sweet flavour, and leaves a 
faint taste of oil in the mouth after it is swallowed. 
In the males, the mammae were similar to the description given by Struthers, in 
his account of a male Humpback caught off the coast of Scotland.* The compressor 
muscles were less developed in the males than in the females. 
Aupirory ORGAN. 
The auditory apparatus was examined in several adult Humpbacks, and also in 
the foetus 13$ feet in leneth. In every case I was surprised to find the external 
auditory meatus completely closed up for a few inches of its course, on the inner side 
of the blubber, 
* Struthers, J., Journ. Anat. and Physiol., 1888, Vol. XXII, p. 117. 
Q 2 
