Mammalia. 23 



provisionally labelled them, those of males. It should be noted, 

 however, that the dimensions of one specimen (No. 44, 4, 6, 1), are 

 somewhat intermediate in character. 



Age. — Three of the skulls brought home by the ' Belgica' Nos. 893, 

 900 and 895 are those of particularly fine animals. But, although 

 they obviously belonged to adults, the development of the sagittal 

 crest is imperceptible. 



The cheek-teeth do not seem to be subject in any marked degree 

 to the processes of wearing down. The effect of use appears more 

 conspicuously in the case of the canines and incisors, perhaps as a 

 consequence of lighting. 



Tcctli: — The simple teeth and their uses have already been 

 discussed (see pp. 14-15). There seems to be a tendency, variously 

 exhibited in the different individuals, but most marked in No. 893 of 

 the ' Belgica ' collection, to show a distinct space between the two 

 last cheek-teeth of the upper jaw in a manner somewhat reminiscent 

 of the corresponding teeth of Otaria {Eumetojyias) stelleri. 



As already stated, the skeleton has been described in detail by 

 Sir William Turner (see Table I, p. 24). 



OGMORHINUS. 



St^norhinque, F. Cuvier, "De quelqiies Especes de Phoqnes et des groupes 

 generi([ucs entre lesquels elles se partagent," M^m. du Museum, t. xi. 

 Stenorhynqae (plate), p. 190, pi. 13, tig. 2, a, 1824. 



Stenorhinehus (sic), F. Cuvier, Diet. Sci. Nat. xxxix. p. 549, 1826 (preoccupied by 

 Stenorhsnachus, Lamarck, Hist. Nat. des i^nimaux Sans Vertebres, &c., 

 tome XV. p. 23f;, July, 1818). 



Stenorhynehus (nee Lamarck), K. P. Lesson, Manuel de Mammalogie, p. 199, 1827. 



Stenorhincus, Hamilton Smith in Jardine's Naturalist's Library, p. 258 (1845- 

 184(5). 



Ogmorhinus, W. Peters, Monatsb. K. Akad., Beiliii, p. 393, footnt>te (1875). 

 Barrett-Hamilton, Antarctic Manual, p. 219 (1901) Type 0. leptonyx 



1. OGMORHINUS LEPTONYX. The Lkopard-Seal or True 



Sea-Leopard. 



" Phoque a petits ongles, Phoea leptonyx," de Blainville, Journ.de Physique, &c., 

 t. xci. i)p. 288-289, and 297-298, Oct. 1820; Desmarest, Mammalogie, i)t. i. 

 }ip. 247-248 (see also footnote to p. 243), 1820; Cuvier, Ossements Fossiles, 

 pp. 207 and 208, pi. xviii. tig. 2 (skull (Jig. mala) 1823) ; J. K. Gray in 

 Griffith's Animal Kingdom, v. p. 128, 1827; ^de Blainville, Osteographie, ii. 

 pi. V. and ix. (figures of skull and teeth of specimen in Paris iNluseum) 1840. 



^ For the date of this work see Mr. C. Davies Sherborn's paper in the ' Annals 

 and Magazine of Natural History,' scr. 7, vol. ii., July 1898. 



