THE WHALEBONE WHALES OF THE WESTERN NORTH ATLANTIC. 123 
No. 7. Female. Length, 50 ft. 7 in. General color dark. Tip of upper jaw 
white inferiorly, with a dark median line. Right mandible entirely white. Left 
mandible dark gray, the anterior boundary of which runs into the fourth left furrow. 
Gray comes down on the ridges under the left pectoral to within twelve ridges of 
the median line. Opposite the navel its inferior border is 324 in. above the same ; 
opposite the anus it is 16 in. above the same. Inferior margin of caudal peduncle 
all white, with only a trace of the post-anal gray mark. (See pl. 8, fig. 1; pl. 9, 
ngs 1s pl. 11, fig. 4.) 
No. 8. Female. Length, 57 ft. 6 in. General color very dark. Below the 
left pectoral the gray runs across the breast to the third ridge above the median 
line. On the right side the gray runs across only a few ridges below the root of 
the right pectoral, and below the extremity of the pectoral, when laid back, only four- 
teen ridges. The right breast, throat, and belly, therefore, are nearly all white. Left 
mandible very dark gray, as is the back. On the sides the gray comes down 
within 14 in. of the anus. A distinct inferior post-anal gray mark on the caudal 
peduncle, and the gray comes down so low that at the insertion of the flukes white 
is almost shut out out from its inferior edge. 
No. 9. Male. Length, 59 ft. 1 in. General color dark. The gray color 
under the pectoral on the left side comes down to within one ridge above the 
median line. Behind this the white of the belly runs up antero-superiorly to the 
axilla. Then the gray comes down again to within eight ridges of the median line. 
Opposite the anus the gray of the sides comes down to a line 15 in. above the 
median line. Post-anal gray mark distinct. (See pl. 8, fig. 3; pl. 10, figs. 2 and 5.) 
No. 10. Male. Length, 53 ft. 9in. A very light individual, especially on the 
right side. On that side there is no gray on the ridges in front of the pectoral. 
The post-pectoral gray area comes down only to within seventeen ridges above 
the median line. The post-anal gray mark is distinct. 
No. 11. FHemale. Length, 70 ft. 8 in. General color dark. The gray of 
the left side comes down across the median line at a point about midway between 
the line of the navel and the tip of the pectoral, when laid back, and runs up on the 
right side on seven ridges, there meeting the dark furrows, and thus causing 
the appearance of a continuous dark band across the belly. Twenty-three furrows 
downward from the root of the right pectoral are gray. All the central part of 
the throat and breast from the mandible backward for 31 feet is white, both ridges 
and furrows. White of the inferior margin of the caudal peduncle very much 
restricted and clouded with gray streaks. Above the anus the gray of the sides 
comes down to within 17 inches, Post-anal gray mark very distinct. 
No. 12. Male. Length, 54 ft,6 in. General color very light. No gray on 
the right side of the belly. On the left side it comes down only to within sixteen 
ridges from the median line. The anterior boundary of the gray of the left mandible 
joins the seventh left furrow. The inferior boundary of the gray of the sides is 16 in. 
above the anus. he post-anal gray mark is very distinct and has a white line 
dividing it into two inferiorly. (See pl. 11, fig. 1.) 
No. 18. Male. Length, 61 ft. 2 in. General color very dark. The gray of 
