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 

 tin 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 

 an tero- posterior mesial band and margins. 



Dorsal fin black, with a few white spots on the anterior margin. 



No. 21. Female. Aug. 18, 1899. (PL 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 rings. 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 (pi. 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 



