61 



Order CETACEA. 



Teeth all similar, conical ; or dissimilar, ridged ; sometimes not 

 developed. 



Palate often furnished with transverse plates of baleen or whale- 

 bone. 



Body fish-shaped, nearly bald, ending in a horizontal tail. 



Front limbs short, fin-shaped. 



Mammalia, Cete, Linn. Si/st. Nat. ed. 12. i. 27 ; Link, Beytr. 1795 ; 



Demn. N. I). H. X. xxiv. 35, 1804 ; Fischer, Syn. 1828 ; Eichivald, 



Zool. Spec. iii. 337 ; Gray, Ann. Phil. 1825. 

 Ceti, Wayler, Amph. 1830. 

 Les Cetaces, Cimer, Tab. Ehm. 1798 ; R. A. i. 271, 1817, ed. 2. i. 281 ; 



F. Ctivier, 1829. 

 Cetaceis, Brisson, R. A. 217, 17G£; Gray, Med. Rep. xv. 309, 1821. 

 M. a iiag-eoires (pars), Desm. N. D. H. N. xxiv. 32, 1804. 

 Natantia, Il/iycr, Proclr. 139, 1811. 



M. pinnata et pinnipedia (pars), Storr, Prodr. Mamm. 1780. 

 Bipedes, Latr. Fain. Nat. 64, 1825. 

 Sirenia et Cete, Selys-Lonychamps, 1842. 

 Cetacea et Amphibia (pars), Rajin. Anal. Nat. 60, 1815. 

 Cete, Gray, Cat. Cetac. B. M. 1850, 1. 

 Cetacea, R. Kno.r, Journ. Proc. Linn. Soc. 1858, iii. 63 ; Gray, P. Z. S. 



1864, 195 ; Proc. Zool. Soc. 1863 ; Ami. <§r Mag. Nat. Hist. 1864, 



xiv. 345. ' ^ ^ 



Synopsis of the Families. 



!>uborder I. Skin smooth, bald. Teats 2, inguinal. Limbs claicless ; fore 

 limbs Jin-shaped ; hinder united, fonning a forked horizontal tail. 

 Nostrils enlarged into bloivers. Cumivorou-s. Cete. 



Section I. Mysticete. Teeth rudimentary : they nerer cut the f/ians. 

 Palate furnished with transrei'se friuycil horny phites (f Ixdeen or 

 whalebone. Head large, depresffcd. Nostrils separate, longitudinal. 

 Gullet very contracted. Tympanic hone single, large, cochleate, at- 

 tached to an expanded periotic bone which forms part of the skull. 



1. Bai./ENid.e. Dorsal fin none. Belly smooth. Baleen elongate, slender. 



^*ertebrfe of neck anchylosed. Pectoral fin broad, truncated at the 

 end ; fingers 5. TjTiipanic bone rhombic. ^Maxillary bones narrow. 



2. Bal.'enoptkhid.^. Dorsal fin distinct Belly longitudinally plaited. 



Baleen short, broad. Maxillnrv bones broad. Pectoral fin lanceolate ; 

 fiugere 4. \'ertebrte of neck free. Tympanic bone oblong or ovate. 



