THE SPERM WHALE 



133 



fully involuted, the uterine cornua measured 12 and 13 cm. across respectively. This 

 measurement is taken transversely across the collapsed uterine cornu when lying on 

 a flat surface ; it is thus greater than the true diameter. In another which was near 

 the end of lactation and in the ovaries of which no corpus luteum a was found, the 



U1 



C 

 D 

 O 



L 



> 



o 



O 



SI 



■ao 



QJ 



8 



- °i 



n 1 -J 



— J— 



10 



• Ovulating 

 o Resting 



II 



Total Length) in nnetres 

 Fig. 37. Sperm whale. Females. Weight of ovaries plotted against total length. Non-pregnant whales. 



10 



u 



(_ 



Q 



C 



QJ 



QJ 



L 



o 



1_ 



a 



5- 



12 3 4- 



Length of Foetus in metres 



Fig. 38. Sperm whale. Females. Mean diameter of corpora lutea in pregnant and ovulating whales. 



uterus was 24 cm. across. This specimen, however, was badly decomposed, so there is 

 the possibility of some doubt as to the exact state of the ovaries. In two whales which 

 were ovulating the uterine cornua both measured 17 cm. across and in another they 

 measured 18 and 19 cm. respectively. In a female pregnant with a foetus 0-2 m. long 

 the pregnant cornu was 25 cm. across and the non-pregnant one 23 cm. In another 



