40 MARINE MAMMALS OF THE NORTH-WESTERN COAST. 
Ft. In. 
Distance from genital slit to flukes 17 
Length of folds on belly 16 
Whole breadth of folds on belly 10 
Distance from flukes to hump 12 3 
Length of hump along the back 3 
Height of hump 1 
Depth of small close to flukes 2 6 
Thickness of small close to flukes 1 G 
Thickness of blubber, five to ten inches ; color of blubber, yellowish white ; 
yield of oil, forty barrels; number of folds on belly, twenty- six, averaging from 
four to six inches in width. These folds, which extend from the anterior portion 
of the throat over the belly, terminating a little behind the pectorals, are capable 
of great expansion and contraction, which enables the Humpbacks, as well as all 
other rorquals, to swell their maws when their food is in abundance about them. 
The following additional measurements, etc., were taken from Humpbacks capt- 
ured on the coast of Upper California, in 1872. 
1. Sex, female. Color of body, black above, but more or less marbled with 
white below. Fins, black above, and dotted with white beneath. Color of blub- 
ber, white. Number of folds on throat and breast, twenty -one, the widest of which 
were six inches. Yield of oil, thirty -five barrels. The yield of bone, which is of 
inferior quality, is about four hundred pounds to a hundred barrels of oil. 
Ft. In. Ft. In. 
Length of animal 48 Anus to notch of caudal fin 12 6 
Length of each pectoral 13 Genital slit to notch of caudal fin 12 11 
Thickness of each pectoral 8 Length of genital slit 3 6 
Breadth of each pectoral 3 5 Size around the body behind pectorals. . 25 
Expansion of caudal fin, or flukes 18 Average thickness of blubber 5 
Breadth of each lobe 3 6 Depth of small at junction with caudal fin, 1 9 
Thickness of each lobe 9 Thickness of small at junction with caud- 
From nib -end to pectorals 16 al fin 1 6 
Pectorals to top of back 4 6 From nib- end to hump 28 
Corner of mouth to nib-end 10 Height of hump 10 
Corner of mouth to top of head 5 4 Length of hump 4 
Eye* to nib-end 10 10 Thickness of black skin 0J 
Eye to top of head 4 6 Eye to ear 2 
Spiracles to nib - end 8 Length of ear slit 1\ 
Length of exterior opening of spiracles. . 1 6 Navel to genital slit 5 
The nib -end, or point of the upper jaw, fell short of the extremity of the 
*We refer the reader to fig. 4, plate x, for forty -six feet in length. The figure is drawn 
illustration of an eye taken from a Humpback to natural size. 
