ON THE ANATOMY OF THE NORTHERN BELUGA. 423 
similar to that described by Dr Muriz* as occupying a corresponding position 
in Globiocephalus melas. On the right side the gland measures 5 inches in 
length, and lies superficial to a second gland of equal size, which rests against 
the inner surface of the lung, and occupies the space between the ventral or 
inferior border and the hilum of the organ. On the left side there is but a 
single lymphatic gland, which corresponds in position to the most superficial 
of the two glands noted on the right side ; it is, however, not so large by one- 
- half. Numerous vessels radiate outwards from these glands as from a centre, 
and run upon the outer surfaces of the lung. Their exact nature could not be 
determined, but in all probability both sanguiferous and lymphatic vessels 
- were present, as described by Dr Muriet in Giobiocephalus melas. The 
lymphatic glands are invested superficially by pleural membrane prolonged 
from the surface of the lung. The glands of opposite sides are almost in 
contact, the interspace being occupied by pleural membrane, an arrangement 
which gives rise to the bridge-like appearance figured by Dr Murte.t 
Wyman { noted in his Beluga a free communication between the different 
parts of each lung. This, as we have pointed out, did not exist in our speci- 
men. Barcray and NeEr1x§ assert the osseous character of the intra-pulmonic 
bronchial rings. Probably, however, they were cartilaginous and not bony. 
‘With these exceptions—the pulmonary organs of Beluga, so far as they are 
described by the above-named observers, presented characters identical with 
those we have noted in the text. Both as regards their shape and unilobular 
character, the lungs of Beluga agree with those of almost every other cetacean. 
Among the toothed whales, Globiocephalus melas || and Risso’s Grampus4 are 
described as possessing a more or less well-defined antero-inferior pulmonic lobe. 
BURMEISTER** notes two unequal parts in the right lung of Hpiodon cryptodon 
(Gray); whilst Dr Wiiamstt asserts the existence in the Chinese Gilobiceps 
of two lobes in each lung. This lobulated condition has not, so far as we are 
aware, been described in any other toothed whale, nor in any member of the 
whalebone group. The large glandular bodies situated at the “ post-ventral” 
margins of the lungs in Beluga appear to have been first fully described by 
Hounter.tt Dr Moris notes their presence in Risso’s Grampus? and in 
Globiocephalus melas;t they exist, moreover, in Delphinus tursio;{tt also in 
GULLIVER’S, §§ WILLIAMS’, |||| and Jackson’s 11 whales.*** 
In respect of their arrangement in the various species of Cetacea, the trachea 
and bronchi present but few variations from that described above in Beluga. So 
constant, indeed, is this arrangement of the respiratory channels in the different 
* II. 265. + IL. p. 266. + IIL p. 610. § VIL p. 388. 
|| II. p. 265. |X. p. 131. ** XLLI. p. 96. tt XIV. p. 412. 
tt XXIL p. 107. §§ XXIIL p. 63. {||| XIV. p. 412. TT IV. p. 164. 
*** The specimens examined by both Guriiver and Jackson belonged to the genus Globiocephalus, 
