52 CETACEA. 



of the largest part of the body, 3 feet ; anterior fin 18 inches long 

 arid 9 inches wide. The dorsal fin or hump forms a very obtuse 



? quite small finlets. Spa 

 4 inches wide midway. Lower jaw to angle of mouth, 1 foot 



8 inches ; right eye, 1| inch long. Circumference of the body, 



9 feet. Jackson, Boston Journ. N. H. v. 139. 



Twelve males were caught at Walderwich, Suffolk, Feb. 1788. 

 The largest was 62 feet long, and the lower jaw 14 feet. Phil 

 Trans. 



There is a skeleton of an adult at Burton- Const able Castle, 

 near Hull, Yorkshire. Described by Beale, 77- 



2. CATODON COLNETI. MEXICAN SPERM WHALE. 



Sperm Whale, Colnet, Voyage, 80. f. 9 ; Beale, N. H. Sperm 



Whale, 22. f. 1-14. 

 Physeter macrocephalus, Brandt fy Hatzeburg, Med. Zool. t. 14. 



f. 3, from Colnet. 

 Spermaceti Whale, Nunn, Narrat. Favourite, 40, 58 (fig. not 



good], 175; Fauna Japonica ? 

 Iniiab. North Pacific. Japan. South Seas, Nunn. " Equatoreal 



oceans," Lesson. 



3. CATODON POLYCYPHUS. SOUTH SEA SPERM WHALE. 



Physeter polycyphus, Quoy fy Gaim. Zool. Uran. Mam. t. 12, 



cop. Richb. Cetac. 5. t. 5. f. 13. 

 Physeter australis asiaticus, Desmoulin, Diet. Class. H. IV. ii. 618; 



Fischer, Syn. 518, from Quoy. 

 Catodon polyscyphus, Lesson, Mamm. 422. 

 Cachalot, or Sperm Whale, Bennett, Whaling Voyage, ii.153, fig. 

 Irihab. Molucca. 



The number of the teeth varies greatly in different individuals, 

 and does not appear to be influenced by either age, sex, or size. 

 Amongst many Cachalots, I find their variations in number to 

 be as follows : 21 on one side of the jaw, 20 on the opposite ; 

 23-21, 22-22, 24-25, 22-23, 24-26, 23-24, 22-24, 19-20. 

 Length of males, 60 to 76 feet ; of female, 30 to 35 feet. Foetus, 

 14 feet long and 6 feet in girth. Bennett, I. c. 154. 



M. de Blainville described what he considered as two varieties, 

 observed in the lower jaws : the first, from Cape Horn, has long, 

 slender, cylindrical, rather acute teeth, and the symphysis to the 

 20th tooth; figured Cuv. Oss. Foss. v. t. 24. f. 8; the second 

 with 25 or 27 blunt and vertical teeth on each side ; the symphysis 

 to the 18th tooth. Ann. Anat.tyPhys. ii. 335, 336. 



