248 



DISCOVERY REPORTS 



m 



n 



q r s 



Fig. 3. Variation in the throat grooves of whales examined at Horta in 1949. 



F17, S 7'5 m -; F 3 8 > ?9 -8 m - 

 F2, (J 12-8 m. ; F25, (J 12-2 m. ; F29, <J 9-9 m. 

 F33, $ 7-8 m - 

 F6, $ 16-0 m. 



F3, <S 12-5 m.; F15, (J 7-8 m. 

 / F36, ? 10-2 m. 



g F 3°> ■S i3' 6 m - 



ft F18, $ 1 1-3 m. 



i F27, (J 111 m. ; F34, $ 9-9 m. 



j F3 1 . ? 9'9 m - 



k F5, S I5' 1 m - 



/ F16, $9-9 m.; F32, $9-5 m. 



m F4, cJ 14-9 m. ; F24, $ 10-4 m. 



n F26, ? n-6 m. 



o F8, cJ n - o m.; F19, $ 12-7 m. 



P F 35. ? 9-5 m - 



q F7, <J 1 1-4 m. 



r F23, ? 10-2 m. 



s F20, (J 14-6 m. 



t F9, ^ 11-3 m. 



Two whales at Horta had additional grooves elsewhere on the body. One male had a pair of grooves 

 immediately posterior to the umbilicus; a sperm whale examined in the 1947-8 Antarctic season had 

 similar grooves. Another male of 16-0 m., notable for the conspicuous development of the corrugations 

 on the flank and chest (Plate I, fig. 2), had four dented grooves on the chest between the flippers, and 

 another deep groove on the post-anal ventral hump, that is, the rising between the anus and the flukes 

 found in all sperm whales. 



