PHYSETER. 45 
1%. Physeter. 
o—o o—Oo 
ans to 2525 40 to 50. 
Physeter Linn., Syst. Nat., 1, 1758, p. 76. 1, 1766, p. 107. Type 
Physeter macrocephalus Linneus. 
Tursio Flem., Phil. Zodl., 11, 1822, p. 211. (nec Wagl. nec Gray.) 
Upper teeth rudimentary; lower jaw with 20 to 25 on each side, 
conical, pointed, and recurved; posterior and lateral edges of cranium 
raised into a compressed semi-circular crest. Cranium above con- 
cave; rostrum elongate, its base broad, thence tapering to the tip; 
mandible long and narrow, the symphysis being more than half the 
length of the ramus; vertebre, 50; zygomatic process of jugula thick, 
massive. 
Fig. XVI. PHYSETER MACROCEPHALUS. CACHALOT WHALE. 
31. macrocephalus (Physeter), Linn., Syst. Nat., 1, 1758, p. 76, 
i700. p.1078 Hihot, Syn, N, Am. Mainm., rg0r, p. 15. 
CACHALOT. SPERM WHALE. 
Type locality. North Atlantic. 
Geogr. Distr. All seas. 
Genl. Char. Size very large; head about one-third the length of 
body, high, truncate, compressed in front; blow-hole longitudinal, 
placed to the left of the median line on the upper end. 
Color. Above black, shading gradually on the sides into the gray 
of the under parts. Individuals sometimes are piebald. 
Measurements. Total length of male, 55 to 60 feet; female much 
smaller. 
