194 " CATOliONTIDiE. 



1862, folio, with five woodcuts). It is 25 feet long, with 48 ver- 

 tebrBB, and appears to agree in most particulars with Balcmoptera 

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

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

 Balcena, 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 fourth nearly equal, a little shorter, the first 

 shorter stUl, 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 tetradactyla to the Balcena rostrata of 

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

 P. gigantea microchira or hrevimana to the B. Physalus 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 

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

 or Eight 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 oi Pterohalcena pentadactyJa ; 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 hothjaws, rarely decidtums.. Palate lined with 

 a hard membrane, without any baleen. GuUet large. Head large or 

 moderate, more or less compressed. Tympanic bones at first separate, 

 nearly similar in size ; they uniie early into a single bone, which is 

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



Cetacea dentata, Brisson, R. A. 225. 



Delphinidse, "J. Gray," Tandhwalar, Xi7J(e6or^, Ofversigt, 1862, p. 3. 



Denticete, Gray, Ann. Sf Mag. N. H. xiv. 1864; P. Z. S. 1864. 



Delphinoidea, JFlower, P. Z. S. 1864, 389. 



Zahnwalle, Esohricht, 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 with capitular processes developed, and articulating 

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

 terior ribs without head, and only articiilating with the transverse 

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

 in front by a surface of variable length, but always constituting a 

 true symphysis. Upper surface of the skuU generally, if not always, 

 unsymmetrioal. Upper end of the maxiUa expanded, and produced 

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

 and unsymmetrioal. Lacrymal bone confluent with the jugal." — 

 Flower, P. Z. S. 1864, 389. 



