i CETACEA. 45 
? Skull short, 
. Koei1a. Dorsal hump ——? Blowers 
broad. 
_ Puyseter. Dorsal fin faleate. Blower on back of forehead. 
+, 
ne Skull elongate. 
4 1. CATODON. SPERMACETI WHALES. 
Head truncated and rather compressed in front, with the blow- 
ers close together on the front of the upper edge, separated from 
the head by an indentation. Nose of skull elongate, broad, de- 
pressed. Lower jaw shorter than the upper one, very narrow, 
‘cylindrical in front, and united by a symphysis for nearly half their 
length. Back with a roundish tubercle in front, over the eyes, 
ealled the “bunch,” and a rounded ridge of fat behind, highest 
in front over the genital organs, called the “hump,” and conti- 
nued in aridge to the tail. No true dorsal fin. Pectoral broad, 
truncated. Teeth conical, often worn down. Males larger than 
the females. 
_ The atlas is distinct; the other cervical vertebre are soldered 
together.— Duvernoy, Bet i ¥95. 
Catodon, Artedi, Syst.; Lacep. Cet.; Rafin. Anal. Nat. 60,1815; 
_ Oken, Lehrb. Nat. 678. 
Physeter (Catodontes), Fischer, Syn. Mam. 517. 
‘Physeter, sp., Linn.; Illiger, Prod. 143, 1811; Lesson, N. Reg. 
| Anim. 201. 
hyseter, Wagler, N. S. Amph. 33. 
Physalus, Lacep. Cet. 219. t. 9, from Anderson, Cacholotte, t. 4. 
‘Balznoptera (Physalus), Fischer, Syn. Mam. 519. 
?Notaphrum, Rafin. Anal. Nat. 60, 1815 (no char, nor type). 
j tus (pars), Oken, Lehrb. Naturg. 674. 
__ The teeth in the lower jaw (in young specimens 16 feet long) 
; not yet come through.—Jackson, l. c. 140. Capt. Benja- 
min Chase states that he has more than once seen teeth of a 
eonsiderable size in the upper jaw of the adult females, though 
ways covered by the gum. The males, he says, bemg much 
larger, are cut up differently, and in such a way as not to expose 
the teeth.—Jackson, Boston Mag. N. H. v. 140. 
__ The upper jaw is not altogether toothless, as usually described. 
_ on either side a short row of teeth, which for the most part 
are placed more interior than the depressions which receive the 
teeth of the lower jaw, though they sometimes also occupy the 
bottom of these cavities. Their entire length is 3 inches; they 
are curved backwards and elevated about half an inch above the 
oft parts, in which they are deeply imbedded, having only a slight 
achment to the maxillary bone. In two instances J have found 
a 
