THE WHALEBONE WHALES OF THE WKSTEKN NORTH ATLANTIC. 109 



Proportion of length of pectoral from head of humerus to total length (average). 



12.4 per cent. (f. av. t., compiled.) 



Variation : 11.8 to 13.3 per cent. (f. w. t., compiled.) 



Percentage of total length anterim- to tlie posterior margin of the doi'salfin (average). 



75 per cent. (f. w. t., compiled.) 



(The larger part of the doi'sal lies behind a vertical line drawn through the 

 vent. Saes.) 



Variation: 72.9 per cent, to 77.7 per cent. (f. w. t., compiled.) 



Proportion of vertical height of dorsal to total length (average). 



2.3 per cent. (f. w. t., compiled.) 



Variation : 2.0 to 3.5 per cent. (f. w. t., compiled.) 



(Ravin gives 1.4 per cent, in one case.) 



Shape of pectoral fins. 



Anterior edge thick, posterior edge thin. 



Pectorals narrowly lanceolate, with the posterior angle generally but little 

 pronounced. (Sars.) 



Color above (normal). 



Blackish, or gray-black. (Cocks.) 



Light browu-gray, or approaching sepia-color. (Sars.) 



Right lower lip white, left dark. 



Dark color extends obliquely down from behind the pectorals, leaving only a 

 narrow white stripe below. (Sars.) 



Variation : Black when some time dead. (Murle, Ravin, etc.) 



Gray-blue. (Cooks.) 



Sars's Lofoten specimen had an irregular light patch between the root of the 

 pectoral and the corner of the mouth. 



Color below (normal). 



White throue;hout. 



" With a grayish band passing over it." (Guldberg.) 



Variation: Tinged with yellowish, especially in oldish individuals. (Guld- 

 berg). 



In a dead whale the posterior 12 feet of the "small," or caudal peduncle, gray 



black. (Cocks.) 



Yellowish white. (Murle. Specimen some time dead.) 



Marhings. 



Jaw and chin white, with black flecks. 



Variation: Left upper and lower lips Jet-black. Right lips enamel-, or milk- 

 white. (Cocks. Dead whales.) 



