82 THE VOYAGE OF H.M.S. CHALLENGER. 



opinion. In Dr. Gray's figure of Eumetopias lobatus 1 only five post-canine teeth are 

 shown in the upper jaw, but in form, cuspidation, and oblique setting they correspond 

 closely with the teeth in my male skull. In an imperfect skull in the Museum of the 

 Eoyal College of Surgeons of England, marked Otaria lobata, there are only five upper 

 post-canines. 



Arctocephalus, F. Cuvier. 



Arctocephales, F. Cuvier, Mem. du Mus., xi. p. 205, 1824. 

 Arctocephalus, F. Cuvier, Diet. d. Sci. Nat., t. xxxix. p. 554, 1827. 



Professor Peters gives the following definition of this genus : — " With longer ears. 



o o o o 



Below the contour hairs a thick under-fur, which in both quite young and old animals is 

 very sparing. Structure of skull and bony palate like Eumetopias." To these characters 



maybe added, post-canines ftt-, the last upper being distinctly behind the maxillary root 



of the zygoma. It is difficult to say how many species are to be referred to this genus. 

 That it contains several is however undoubted. The Fur-Seal of the Pribylov Islands is 

 quite distinct from the South American Fur-Seal, both of which again differ from that of 

 the Cape of Good Hope, and from the Fur-Seal of Australia and New Zealand. The 

 Fur-Seal of Kerguelen Island is apparently a distinct species, and so also, perhaps, is the 

 one from Juan Fernandez. It is possible also that there are other species. 



Arctocephalus australis (Zimmermann). South American Fur-Seal. 



Phoca australis, Zimmermann, Geogr. Gesckichte, iii., 1783. 



,, faUdandica, Shaw, General Zoology, i. pt. 2, p. 256, 1S00. 

 Euotaria nigrescens, Gray, Zool. Voy. "Erebus" and "Terror," p. 12, 1875. 

 Otaria faUdandica, Abbot, Proc. Zool. Soc. Lond., 1868, p. 192. 



Arctophoca falclandica, Burmeister, Die Seehunde der argentinischen Kiisten, Buenos Aires, 

 1883. 



I have described, in the first part of this Eeport, the skull and skeleton of this 

 animal with considerable detail, from specimens shot in the Messier Channel. The 

 skull closely corresponds with certain crania in the British Museum from the Strait of 

 Magellan, labelled Arctocephalus nigrescens, and also with the specimens in the Museum 

 of the Royal College of Surgeons of England from Lobos Island, River Plate, and from 

 the Falkland Islands, labelled Otaria australis or Otaria falhlandica, so that the specific 

 terms falklandicus and nigrescens are obviously synonyms of australis. This Seal 

 frequents therefore the southern part of the South American continent on both the 



1 Zoology of Voyage of " Erebus " and " Terror," vol. i., Mammalia, pi. xvii. 



