1 94 CATOT)ONTID.E. 



18G2, folio, with five woodcuts). It is 25 feet long, with 48 ver- 

 tebi'jc, and appears to agree in most particulars with Balcenoptera 

 rostrata, or Beaked Whale of Hunter, The fore-lirab or hand has 

 five short fingers, like the short truncated fin of the Right Whale or 

 Bcdcnna, the first having three, the second four, the third five, the 

 fourth four, and the fifth a single phalange. The middle finger is 

 longest, the second and foxirth nearly equal, a little shorter, the first 

 shorter still, and the fifth rudimentary and very slender (see f. 5 

 at p. 22). He proposes to call it Pterohalcena nana pentadactyla, 

 giving the name of P. nana tetradadijJa to the Bakena rostrata of 

 Hunter, P. gigantea longimana. to the Megaptera longlmana, and 

 P. gigantea inkrochira or hrevimana to the B. PJn/salus of Scoresby. 



I think this determination requires reconsideration, for I am 

 doubtful if this specimen is not made — that is to say, a skeleton of 

 Bahrnoptera rostrata with the arm and fingers of a young true Balcena 

 or llight Whale appended to it. 



Mr. Flower (Proc. Zool. Soc. 1864, 394) observes, " Barkow (Das 

 Leben der Walle, &e. : Breslau, 1862) has described another species 

 under the name of Pterobala;na pentadactgla ; but much uncertainty 

 hangs over the origin and composition of the single skeleton in the 

 Museum at Breslau, on which it is founded. If genuine, it would 

 necessitate a considerable modification of both the family and generic 

 characters." 



Section II. DENTICETE. 



Teeth well developed in one or both jaws, rarely deciditous. Palate lined xcith 

 a hard membrane^ without any haleen. Gidlet larye. Head large or 

 modei-ate, more or less compressed. Tympanic hones at first sqmrate, 

 nearly similar in size ; they unite early into a single hone, which is 

 sunk in and suspended in a cavity in the base of the sktdl. 



Cetacea dentata, B^-isson, R. A. 225. 



Delphinidse, " J. Gray," Taudhwalar, Lilljehorq, Ofversigt, 1862, p. 3. 



Denticete, Gray, Ann. 8f Mar,. N. H. xiv. 1864 ; P. Z. S. 1864. 



Delphinoidea, Flotoer, P. Z. 'S. 1864, 389. 



Zahnwalle, Eschricht, Nord. Wallthiere, 7. 



"Teeth always developed after birth, and generally numerous, 

 sometimes few and early deciduous. No baleen. Sternum elon- 

 gated, composed of several pieces placed one behind the other, to 

 which are attached the ossified cartilages of several pairs of ribs. 

 The anterior ribs ^vith capitular processes developed, and articulating 

 with the bodies of the vertebrae, as in other Mammalia. The pos- 

 terior ribs without head, and only articulating with the transverse 

 processes. Rami of mandible straight, the two coming in contact 

 in front by a sui'face of variable length, but always constituting a 

 true sjTnphysis. Upper surface of the skull generally, if not always, 

 unsyrametrical. Upper end of the maxilla expanded, and produced 

 over the orbital process of the frontal bone. Nasal bones rudimentary 

 and unsymmetrical. Lacrymal bono confluent with the jugal." — 

 Floxver, P. Z. 8. 1864, 389. 



