Dr. H. Burmeister on some Cetaceans. 99 
Fiy. 4. Bombus fervidus. The pupa state, where the body has become 
much shorter, the appendages of the head and thorax greatly 
differentiated, the external genital organs wholly retracted with- 
in the cavity of the abdomen, the head freer from the body, 
and the whole bulk of the head and thorax together, including 
the appendages, greater than that of the abdomen. c¢, the pro- 
podeum, nearly concealed in a side view; p, labrum; q, maxilla, 
with the two-jointed palpi at the extremity; r, tip of the lingua. 
XVI.—On some Cetaceans. By Hrrmann BuRMEISTER. 
(From a Letter to Dr. J. E. Gray.) 
[Plate IX.] 
Tue Museum has received another new species of Cetacea since 
my letter; it is a new Orca, which I name O. magellanica, 
and now send a figure of the skull with a description. The 
species is nearest to O. capensis, but more slender and different 
in many respects, as you will find by comparing my figure and 
description. ‘The animal was found on the shore, near the 
mouth of the small river called “‘ Arroyo de Cristiano muerto,” 
in S. lat. 38° 50', and was in a perfect state of preservation ; 
but, by the negligence of the people who found it, the whole 
skeleton was lost, with the exception of the skull and two verte- 
bre (one dorsal, one caudal) which have come into my hands. 
From your Catalogue I learn that you do not know the skull 
of the adult Sea-Lion or that of Arctocephalus Falklandicus. We 
have both in the Museum, these two species being the only ones 
which are found in the Atlantic, near the mouth of the Rio de 
la Plata. They were formerly very common on the small islands 
north of the mouth of the river, named from them “ Islas de los 
lobos,” lobo marino (sea-wolf) being the Spanish name for a 
Seal; and not unfrequently they come into the mouth of the 
river even as far as Buenos Ayres, where I have already twice 
seen full-grown living specimens of Arctocephalus Falklandicus. 
Both of these were, I believe, carried to France; but perhaps 
they died on the voyage. They were kept here for a long time 
in a large basin of fresh water; and I was one of the daily 
visitors to these very interesting animals*. 
We have in the Museum a young half-grown specimen nearly 
3 feet in length. From this I have taken the skull, of which I 
now send you a description and drawings (PI. IX. fig. 1 from 
above, and fig. 2 from the side, one-half natural size; fig. 3, end 
of the palatine bones, natural size; and fig. 4, some teeth, seen 
from the inside, also natural size. The numbers indicate the 
* T have no doubt it is one of these that is now alive in the Zoological 
Gardens in the Regent’s Park.—J. E. G. 
