SEALS. 5 
_. Secr. 1. Grinders similar, double-rooted.—1l. Callocephalus 
(vitulinus); 2. Stenorhynchus (leptonyx); 3. Pelagius (mona- 
chus). 
- Sect. 2. Grinders simple-rooted; cutting teeth ¢.—4. Stem- 
-matopus (cristatus); 5. Macrorhinus (proboscidalis). 
Secr. 3. Grinders simple-rooted ; cutting teeth $.—6. Arcto- 
cephalus (ursinus); 7. Platyrhynchus (leonimus). 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. Phocide or Brachiodontia; 2. Ota- 
_riade; and 3. Tricheyhide 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 :-— 
 Secr. I.—l. Stenorhynchus (leptonyx); 2. Pelagius (mona- 
chus); 3. Phoca (vitulina). 
Sect. I].—4. Halicherus (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 Phocide from the study of the skulls :— 
1. Arctocephalina: 1. Otaria; 2. Arctocephalus. 2. Triche- 
cina: 3. Trichecus. 3. Phocina: 4. Morunga; 5. Cystophora ; 
6. Halicherus; 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 ; 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 +; hind-feet nearly clawless ; muffle hairy 
on the edge and between the nostrils ; 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. Lopopon. Skull and muzzle elongate; grinders unequally 
lobed. 
