194 CATODONTIDJ^. 



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

 tebrte, and appears to agree in. most particulars with Balcenoptera 

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

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

 BaJcena, 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 pi'oposes to call it JPterobcihena nana pentadactyla, 

 giving the name of P. nana tetradadyla to the Balcena rosirata of 

 Hunter, P. giganfea Jonri'munm to the Megaptera longhnana, and 

 P. gigantea mhrocMra 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 

 Balamoptera rosirata with the arm and fingers of a young true Bala;na 

 or Right Whale appended to it. 



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

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

 Tinder the name of Pterobalcena pentadactyla ; 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 m one or hothjaics, rarely deciduous. Palate liiied with 

 a hard memhrane, without any baleen. Gullet large. Head large or 

 moderate, 7nore or less comiyressed. Tympanic bones at first separate, 

 nearly similar in size ; they unite early into a single bone, ivhich is 

 stmk in and suspended in a cavity in the base of the skull, 



Cetacea dentata, Brisson, R. A. 225. 



Delphiuidffi, "J. Gray," Tandhwalar, ii7^eJo/T/, Ofversiqt, 1862, p. 3. 



Denticete, Gray, Ann. ^- Mar,. N. H. xiv. 1804 ; P. Z. 'S. 1804. 



DelpLinoidea, Flouwr, P. Z. 'S. 1804, 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 with capitular processes developed, and artic\ilating 

 with the bodies of the vertebraj, 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 bj' a siu'face of variable length, but always constituting a 

 true symphysis. Upper sm'face of the skuU generally, if not always, 

 unsymmetrical. Upper end of the maxiUa expanded, and produced 

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

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

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



