§2. ’ CETACEA. 
of the largest part of the body, 3 feet ; anterior fin 18 inches Ion 
and 9 inches wide. The dorsal fin or hump forms a very ob a 
angle, and is ill-defined, being about 10 inches in length and 2 
3 inches in height ; there being also between it and the cauda 
two or three quite small finlets. Span of tail 1 foot 7 inches, a 
4 mches wide midway. Lower jaw to angle of mouth, 1 foc 
8 inches ; right eye, 1} mch long. Circumference of the body, 
9 feet.—Jackson, Boston Journ. N. H. v. 139. 
Twelve males were caught at Walderwich, Suffolk, Feb. 178% 
The largest was 62 feet long, and the lowe jaw 14 feet, —Phil 
Trans. 
There is a skeleton of an adult at Burton-Constable Castle 
near Hull, Yorkshire. Described by Beale, 77 
2. CatTopon COLNETI. MEXICAN SPERM WHALE. 
Sperm Whale, Colnet, Voyage, 80. f.9; Beale; N. H. Spe 
Whale, 22. f. 1-14. 
Physeter ‘macrocephalus, Brandt § Ratzeburg, Med. Zool. t. 14. 
f.3, from Colnet. a 
Spermaceti Whale, Nunn, Narrat. Favourite, 40, 58 (fig. no 
good), 175; Fauna Japonica? \. 
Inhab. North Pacific. Japan. South Seas, Nunn. “ Equatore 
oceans,’ Lesson. 4 
3. CATODON POLYCYPHUS. Soutu Seca Sperm WHALE. ~ 
Physeter polyeyphus, Quoy & Gaim. Zool. Uran. Mam. t. 1% 
cop. Richb. Cetac. 5. t. 5. f. 13. 7 
Phvseter australis asiaticus, Desmoulin, Dict. Class. H. N.u. 618} 
Fischer, Syn. 518, from Quoy. 
Catodon polyscy phus, Lesson, Mamm. 422. 9 
Cachalot, or Sperm Whale, Bennett, Whaling Voyage, ii. i ig 
Inhab. Molucca. { 
The number of the teeth varies greatly in different individual 
and does not appear to be influenced by either age, SEX, OF size 
Amongst many Cachalots, I find their variations in number t 
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, 19-2 
Leng th of es 60 to 76 feet ; of famale, 30 to 35 feet. Foetu 
14 feet long and 6 feet in eirth —Bennett, l. . 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 # 
20th tooth; figured Cuv. Oss. Foss. v. t. 24. f. 8; the seco 
with 25 or 27 blunt and vertical teeth on each side ; the symphys 
to pe 18th tooth.—Ann. Anat. & Phys. 1. 335, 336. ‘4 
