THE WHALEBONE WHALES OF THE WESTERN NORTH ATLANTIC. 219 
white spots, also apparently due to barnacles. These spots extended up a con- 
siderable distance on the sides of the caudal peduncle. 
The upper surface of the pectorals was entirely white, except for a short dis- 
tance at the root; the posterior margin was occupied by an irregular, interrupted 
black line, consisting of round black spots thickly massed together ; on the anterior 
margin the knobs or protuberances were black, and were occupied by clusters of 
barnacles. The lower surface of the pectorals was entirely white, except the pro- 
tuberances and a narrow, poorly defined posterior margin, and the tip, which were 
black. 
The flukes were black above; below white, with a semicircular black area 
surrounding the mesial notch and a similar and larger one invading the white from 
the caudal peduncle. The extreme tips and the protuberances along the posterior 
margin were also black, and the anterior margin for about 3 in. deep. The dorsal 
fin was black, with a few white spots on the free margin and sides. A white spot 
behind the eye, and another on the upper lip, near the apex of the jaw. 
No. 6. Female. Aug. 6, 1899. (Plate 39, figs. 2, 3.) Similar to the last, but 
with much less white. Upper jaw, back, and practically the whole of the body 
above and below, from the line of the pectorals backward, black. Throat and 
chest strongly varied with white spots, streaks, and blotches, the largest below the 
middle of the left side of the mandible. The posterior half of the pectoral ridges 
almost completely black, with only a few scattered white spots. Only a few white 
spots at the navel and around the genital orifice. Margin of lower jaw black. 
Upper jaw with a white spot near the anterior end. 
Upper surface of the pectorals almost entirely black in the proximal half, and 
in the distal half varied with white and black in equal proportions. Lower sur- 
face entirely white. 
Flukes black above; white below in the center of each lobe, with broad black 
antero-posterior mesial band and margins. 
Dorsal fin black, with a few white spots on the anterior margin. 
No. 21. Female. Aug. 18, 1899. (PI. 40, fig. 3.) Less white than in either 
of the preceding specimens. The white markings of the body confined almost en- 
tirely to the throat, and consisting chiefly of rmgs. A few white marks extending 
along the median line of the breast as far as the line of the pectorals. A few white 
spots about the genital orifice and on the inferior margin of the caudal peduncle. 
Upper surface of pectorals entirely white except at the root and along the 
posterior margin and on the protuberances; lower surface white, except for a 
narrow irregular posterior black margin, and black tip. 
A young female taken at Provincetown, Mass., in 1879, as shown by photo- 
graphs and sketches in the National Museum (pl. 41, fig. 6), had the upper 
surface of the pectorals white, with a black mark extending along the axis from 
the root about half way to the tip, but not wide enough to reach the margins of 
the fin; the posterior margin with irregular black marks; anterior margin white, 
except on the larger protuberances; lower surface closely resembling the upper. 
Flukes black above; below, with a large white central area on each lobe, surrounded 
