13 
1914-15.] The Baleen Whales of the South Atlantic. 
from which the lip-like process projected, the great tympanic cleft with its 
comparatively shallow Eustachian notch, proclaimed the South Atlantic 
Fig. 1. — Outer Surface of Left Tympanic, Balcenoptera rostrata, from Elie, 
Firth of Forth. Reduced in size. A, anterior, P, posterior border. 
specimen to be identical with that of the well - known Lesser Piked 
Balaenoptera which frequents the Scottish seas. 
It will be noted that in all the specimens measured in the Table the 
height of the tympanic, taken from the keel below to the superior border 
immediately in front of the lip-like process, was distinctly greater than 
