68 



Section I. MYSTICETE. 



Teeth rudimndanj ; they never cut the jaws, and are absorbed. Palate 

 fumislied with transverse frinyed horny plates of baleen or tohalebone, 

 fm-minf/ a '^screening-apparatus." Head large, depressed. Bloioers 

 far back, longitudinal, each covered with a valve. Spout double. Eyes 

 small, near angle of the mouth. Gullet very contracted. Tympanic 

 bones large, conch-like, attached to an expanded periotic bone, 7vliich 

 forms part of the skull. Lacrymal and malar bones thin, small. Living 

 on mollusca and fisli. 



Balasna, Cui\ Tab. Mem. 1798 ; Lesson, N. Tab. Reg. Anim. 201. 



Eala3nada3, Grai/, Lond. Med. Repos. xv. 310. 



Les Baleines, F. Cuv. 1829. 



Cete, Illiger, Prodr. 141, 1811. 



Cetacea edentula, Rrisson, R. A. 218. 



Edentes abnormaux, Blainr. 1816. 



Cete hydr£eoolossi, § B, JVagler, N. S. Amph. 3-3, 1830. 



Cetaces, Lesson, N. Tab. Rig. Anim. 197, 1842. 



Cetacea, Rajin. Anal. Nat. 00, 1815. 



Ruderer Wale, Oken, Lehrb. Nat. G61, 1815. 



Balenidia, Rajin. Anal. Nat. 61, 1815. 



BaliBnidaj, Gray, Ann. Phil. 1828 ; Zool. Erebus if Terror, 15 ; Cat. 



3Iamm. B. M. ; Cat. Cetac. B. M. 5, 1850 ; Selys-Longchamps, 1842. 

 Vermivora, Lesson, N. Tub. Reg. Anim. 201. 

 Bale, Oken, Lehrb. Ncdurg. 603, 1815. 

 Les Baleines (Baleniens), Geoff. Leqons, Mamm. 67, 1835 ; Duvernoy, 



Ann. Sci. Nat. 22, 1851. 

 . Bartenwalle, Eschricht, Nord. Wallthiere, 7, 1849. 

 (Baleen Whale) Balsenidse, Owen, Cat. Osteol. 3Ius. Coll. Surg. ii. 439. 

 JBalsenidre, "J. Gray," Bardhwalar, Lilljeborg, Ofversigt, 39, 1862. 

 Balseuoidea sen Mysticete, Flower, Proc. Zool. Soc. 1864, 388. 



■" Teeth never functionally developed, but always disapijearing be- 

 fore the close of the intra-uterine life. Upper jaw provided with plates 

 of baleen. Sternum composed of a single jiicee, generally broader 

 than long, and connected only with the first rib. No costal sternal 

 bones ; all the ribs at their upper extremity articulating only with 

 the transverse processes of the vertebrae ; their capitular processes 

 when developed rudimentary, and not forming true articulations with 

 the bodies of the vertebra?. Hami of the mandibles curved, their 

 anterior ends meeting at an angle and connected by fibrous tissue, 

 without any true symphysis. Skull symmetrical. Maxilla produced 

 in front of, but not over, the orbital process of the frontal. Nasal 

 bones well developed, spnmetrical. Lacrymal bones distinct from 

 the ]vigal."— Flower, P. Z. S. 1864, 388. 



M. Geoffrey observed rudimentary teeth in the lower jaw of a 

 foetal whale. — Ann. du Mus. x. 365. Eschricht figures them in the 

 foetal jaw of a Mec/aptera. — Danish Transactions, 1843, xi. t. 3. 



The substance called Whalebone is of the same nature as horn ; it 

 is wholly composed of animal substance, and extremely elastic. — 

 Hunter, Phil. Trans. 1787. It is called /f/HOii by the French. The 

 Scotch even at the time of Sibbald caUed it baleen, probably from the 

 French. — Fleming, Wern. Trans. 203. 



The baleen or whalebone has generally been considered as the 



