The Osteology of Dallia pectoralis. i 259 
Splanchnology. 
The air-bladder is very small; in a specimen 145 mm in length 
it is but 24mm long and 3 or 4 mm wide at its widest part. It 
extends back just beyond the tip of the pectoral, its posterior fifth 
being above the stomach. It is widest at its posterior part taperine 
eradually forward, and attaching directly at its anterior end to the 
dorsal wall of the oesophagus. It appears as a diverticulum from 
the oesophagus, and opens into it through a comparatively large 
pore. Usually the pneumatie duct connecting the air-bladder with 
the oesophagus is a slender short tube springing from the lower 
surface of the latter a little distance from its anterior end. 
The oesophagus bends slightly downward and enters the 
stomach at an oblique angle It is very much constrieted and 
crowded into the stomach so that the walls of the latter slightly 
enfold it. 
The stomach is short and broadly cone-shaped, more than half 
as broad as long and has its widest part placed anteriorly. Towards 
its anterior end its walls become much thickened and are lined with 
longitudinal folds. 
The intestine is somewhat constrieted as it leaves the stomach, 
passing abruptly forward as the duodenum, slichtly tapering to the 
anterior part of the abdominal cavity, turning abruptly backward 
and without convolutions, running to the anal opening. The rectum 
is not at all enlarged, but its origin is indicated by an internal 
fold, or ring-like valve. 
The liver is moderate in size, having no median lobe and with 
short lateral lobes; the right lobe is more slender and thinner than 
the left, but is no longer. 
The spleen is a nearly round body, situated below the pylorus 
The gall-bladder is large and thin walled, and is placed anter- 
iorly above the right lobe of the liver and below the anterior bend 
of the intestine. 
As compared with the salmon, the reproductive organs, the 
kidneys, and the other organs of the abdominal cavity not described 
offer nothing peculiar. 
