THE AMERICAN XA TURALIST. [\'ol. XXXVIII. 



the adjacent parts, that were thus raised. In the view here 

 shown, which was taken from directly behind the animal's head, 

 there can be no doubt that the portion elevated in spouting 

 is the region lying along the external side of each nasal aper- 

 ture. The broad, shallow groove or depression extending down- 

 ward from each side of the blow-holes may possibly be due to 

 the muscular contraction incident to the raising of the two 

 ridges. The same feature in side view is possibly shown in one 

 of the photographs by True (:03 , PI. 25, Fig. 2). No such 

 groove was seen in the dead specimens. The column of vapor 

 itself is clearly single, even though arising from two apertures, 

 for the latter are situated so close together that the two jets 



of vapor must unite at once. The photographs do not, there- 

 fore, bear out Packard's ('66, p. 272) statement, on the testi- 

 mony of another, that the Sulphur-bottom blows in a " double 

 stream which is directed backward toward the tail." The blow- 

 holes of a large whale of this species are represented in Figure 

 2. I he animal lies on its left side with the upper surface of the 

 head toward the observer. The mouth is partly open, and from 

 It project.s the fringe of baleen. The two slit-like nasal open- 

 mgs aie seen near the lower right hand of the figure and appear 

 to be situated between the arms of a V-shaped prominence 

 whose point is directed forward, and is continued as a slight 



