PHYSETERIDA. — CXCIII. 335 
ovate, placed low, with five fingers enclosed in thick skin; snout 
more or less produced, the forehead rising abruptly in the adult. 
Genera 4 ; species about 10, mostly of the Southern seas. 
a. Teethin 6 evident. 
b, Visible teeth two, in tip of lower jaw . . . . . . Zrpxtus, 580. 
bb. Visible teeth two, in side of lower jaw. . . . . MEsoPLODON, 581. 
aa. Teeth in both jaws wanting or concealed; beak long. 
Hyprroopon, 582. 
580. ZIPHIUS Cuvier. (An old name, from ios, sword ?) 
1107. Z. cavirostris Cuvier. L. 20 feet. Atl. (Hu.). (Lat, 
concave-snout.) 
581. MESOPLODON Gervais. (séoos, middle; émdov, 
armature ; édap, tooth.) 
1108. M. bidens (Sowerby). Cow-risu. N. Atl., scarce. 
L. 20 feet. (Zu.) (Lat., with two teeth.) 
582. HYPEROODON Lacépéde. (imepda, palate; ddap, tooth.) 
1109. H. rostratus (Miiller). BorTLE-NoseD WHALE. 
SperM-WHALE Poreorse. Beak distinct in young, obscured in 
adult by the development of bony crests which give the head the 
shape of a trunk or chest. N. Atl. L. 25 feet. (Hu.) (Lat., 
long-nosed.) (Z. semijunctus Cope.) 
Famity CXCHI PHYSETERIDAN. (Tue Srerm 
WHALES.) 
Teeth numerous, in lower jaw only; lower jaw very thin and 
flat; upper jaw heavy; eye placed high, much above angle of 
mouth. Two genera, with 3 or 4 species, in warm seas, 
a. Dorsal fin present, behind middle of back; teeth 18 to 30, very sharp; 
head bluntish but not truncate; spiracles on top of head ; length about 
20 feet. . . . . Koera, 583. 
aa, Dorsal fin wanting “teeth 40 to 50, large and blunt; “head very long and 
deep, truncate in front, the cavity of the snout filled with oil and sper- 
maceti; spiracles in front of head ; length 60 to 80 feet. 
PHYSETER, 584, 
583. KOGIA Gray. 
1110. K. breviceps (Blainville). Piemy Sperm WHate. 
L. 10 feet. Warm seas, occasional on our coast. (Lat., short- 
headed.) (Eu.) 
584, PHYSETER Linnzus. (gvon7np, a whale, from ducda, 
to blow.) 
1111. P. macrocephalus L. Sprrm Wate. Cacnator. 
Blackish, paler below. Open sea, commonest far S.; one of the 
