THE WHALEBONE WHALES OF THE WESTERN NORTH ATLANTIC. 169 
at their posterior ends. Under the base of the pectorals a semicircular area of 
nearly pure white about two feet in diameter. Light (but not white) spots scattered 
far forward and anterior to the line of the corner of the mouth. Navel white. 
Proximal half of the anterior margin of the right pectoral invaded by the dark 
color of the external face. Tip dark, with various dark lines extending backward 
on the internal face. Left pectoral all light gray at the base externally, and light 
blotches and marks extend nearly to the tip. (See pl. 17, figs. 2 and 4.) 
No. 21. Female. July 5, 1901. Total length, 65 ft. 2 in. A very light 
individual. The ground color light gray and the markings nearly white. On the 
abdominal ridges a broad band of white extends from the base of the pectorals 
(where there is a large white area) obliquely downward and backward to the pos- 
terior end of the ridges, being produced by the coalescence of the white spots. 
Anteriorly, white spots extend on the ridges far beyond the line of the eye. Light 
streaks above and below the eye, and some light blotches on the left jaw. An 
almost white line runs into the eye from behind and streaks of nearly pure white 
cover a triangular area between the eye and the ear. Inferior median line, from the 
navel to the pudendum, plain gray. Numerous white dashes around the anus and 
pudendum. Flukes with a white ground underneath anteriorly, overlaid with gray 
fore-and-aft lines. The white of the underside of the left pectoral invades the 
external face at the tip, making the whole tip white externally; white lines run 
from the tip externally, nearly one-quarter the length of the fin. (See pl. 14, fig. 
2-\ pls 18, fig. 2; pl. 20, fig. 25 pl. 21, fig. 3.) 
No. 25. Female. July 8, 1901. Total length, 69 ft. 6 in. A light indi- 
vidual. Inferior median line blotched throughout. Much white on the abdominal 
ridges. Dorsal fin not light, nor white. 
No. 26. Female, July 8, 1901. Total length, 65 ft. 8 in. A dark indi- 
vidual. The flanks show much more dark gray than light, the blotches of the 
latter color being distinct from each other and scattered. White spots on the 
abdominal ridges clear, but scattered. At the head of the humerus the same, but 
above the pectoral fin the blotches on the sides of the body fuse together into a 
nearly solid light area. Light color extends forward to the eye and the corner of 
the mouth. Tip of the pectorals, externally, white for about a foot. (See pl. 17, 
figs. 1 and 3.) 
Hallas gave in 1868 (60, 162) most excellent data regarding the color of six 
Iceland Sulphurbottoms, which make it possible to institute detailed comparisons 
with the Newfoundland specimens. His notes on color reduced to tabular form 
are as follows: 
BALA{NOPTERA MUSCULUS (L.). ICELAND. 
Color of head and back. 
A. Tegarhorn, Berufjord. ¢. Dark gray, with single irregularly-distributed lighter dashes 
and spots. 
B. Vedfjord, in Nordfjord. ¢. Uniform dark gray. 
Ce Ditton o. Dark gray, with lighter dashes, or spots. 
De Dittos ac Uniform dark gray. 
BE. Ditto. ¢. Dark gray, without gradations. 
F. East of Seydifsjord. &. Dark gray, with lighter dashes and spots. 
