SEALS. 



SECT. 1. Grinders similar, double-rooted. 1. Callocephalus 

 (vitulinus) ; 2. Stenorhynchus (leptonyx) ; 3. Pelagius (mona- 

 chus). 



SECT. 2. Grinders simple- rooted ; cutting teeth f. 4. Stem- 

 matopus (cristatus) ; 5. Macrorhinus (proboscidalis). 



SECT. 3. Grinders simple-rooted ; cutting teeth f . 6. Arcto- 

 cephalus (ursinus) ; 7- Platyrhynchus (leoninus). An abstract of 

 this paper is given in Fischer, Syn. Mam. 230. 



Mr. Joshua Brookes, in the Catalogue of his Anatomical and 

 Zoological Museum, 80, 1828, divides the Tetrapterygia, or Seals, 

 into three families: viz. 1. Phocidcs or Brachiodontia ; 2. Ota- 

 riadcE ; and 3. Tricheyhida or Campodontia, p. 37. 



Professor Nilsson, in 1837, in a monograph of the species of 

 Seals, proposed to divide them into seven genera, distributed 

 into two sections thus : 



SECT. I. 1. Stenorhynchus (leptonyx) ; 2. Pelagius (mona- 

 chus) ; 3. Phoca (vitulina). 



SECT. II. 4. Halichwrus (grypus) ; 5. Trichecus (rosmarus) ; 

 6. Cystophora (proboscidea and cristata); 7- Otaria (jubata and 

 ursina). 



See Vetensk. Acad. Handl. 1837,235; Scand. Fauna, no. 20, 

 1840. This essay is translated into German by Dr. Peters in 

 Wiegmann Arch. vii. 301. 



In the * Zoology of the Erebus and Terror ' there is a revision 

 of this arrangement, which is followed in this Catalogue. 



Mr. Turner, in 1848, proposed the following arrangement of 

 the family Phocidce from the study of the skulls : 



1. Arctocephalina : 1. Otaria; 2. Arctocephalus. 2. Triche- 

 cina: 3. Trichecus. 3. Phocina: 4. Morunga; 5. Cystophora; 

 6. Halichserus; 7- Ommatophora; 8. Lobodon; 9. Leptonyx; 

 10. Stenorhynchus; 11. Phoca. Proc. Zool Soc. 1848, 88. 



SYNOPSIS OF THE TRIBES AND GENERA. 



A. Grinders two-rooted; ears none j toes simple, of fore-feet 

 short, of hind-feet unequal, the outer of each side longest, 

 the middle shortest ; the palms and soles hairy. 



a. Cutting teeth f _; hind-feet nearly clawless muffle hairy 

 on the edge and between the nostrils j fore-feet triangular ; 

 wrist very short. Stenorhynchina. 



* First, second and third front upper and the first front lower 

 grinders single-rooted, the rest two-rooted. 



1. LOBODON. Skull and muzzle elongate ; grinders unequally 

 lobed. 



