PHYSETERID^E. 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. Teeth in $ evident. 



b. Visible teeth two, in tip of lower jaw ...... ZIPHIUS, 580. 



bb. Visible teeth two, in side of lower jaw ..... MESOPLODON, 581. 

 aa. Teeth in both jaws wanting or concealed ; beak long. 



HYPEROODON, 582. 



580. ZIPHIUS Cuvier. (An old name, from gtyos, sword ?) 



1107. Z. cavirostris Cuvier. L. 20 feet. Atl. (Eu.}. (Lat., 

 concave-snout.) 



581. MESOPLODON Gervais. (^eVoy, middle ; oTrXov, 

 armature ; oficoi/, tooth.) 



1108. M. bidens (Sowerby). COW-FISH. N. Atl., scarce. 

 L. 20 feet. (Eu.) (Lat., with two teeth.) 



582. HYFEROODON Lac^pede. (uTrtpwa, palate ; oStoi/, tooth.) 



1109. H. rostratus (M tiller). BOTTLE-NOSED WHALE. 

 SPERM-WHALE PORPOISE. 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. (Eu.) (Lat., 

 long-nosed.) (Z. semijunctus Cope.) 



FAMILY CXCIII. PHYSETERID^EJ. (THE SPERM 

 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 .................. KOGIA, 583. 



art. 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). PIGMY SPERM WHALE. 

 L. 10 feet. Warm seas, occasional on our coast. (Lat., short- 

 headed.) (Eu.) 



584. PHYSETER Linnaeus, (^vcr/jr^p, a whale, from 



to blow.) 



1111. P. macrocephalus L. SPERM WHALE. CACHALOT. 

 Blackish, paler below. Open sea, commonest far S. ; one of the 



