182 TRANSACTIONS OF THE [May 11, 
Fia. 2. The membranous ear as seen from the inside at right angles to 
and on a level with the head. It shows the position of the ductus endolym- 
phaticus (d. end. ) and its relation to the sacculus (s.), utriculus (u.) and the 
recessus utriculus (r. u.). It also shows the position of the utriculus (u. ) 
with respect to the recessus utriculus (r. u.) and the ampulla of the anterior 
canal (a.a.). The two dotted lines that extend from the ramulus of the 
posterior ampulla to the ductus canalis posterioris (d. c. p.) show the course 
of the ramuli of the macula neglecta. (m. n.) marks the macula. 
Fic. 3. The membranous ear as seen from in front. It shows the over- 
lapping of the connecting tube of the posterior canal (p.c. t.) over the sinus 
utriculus (sin. u.). It also shows the position of the nerve (n.) which sup- 
plies the recessus utriculus (r. u.) and the ampullz of the horizontal and 
anterior canals (h. a.) (a.a.). 
Fic. 4. The membranous ear as seen from behind. It shows the pos- 
terior canal (p.c.) and the tube (d. c. p.) that connects it with the sacculus 
(s.), lagena (1.) and sinus utriculus (sin. u.) as seen from a posterior direc- 
tion. It shows the angle of the horizontal canal (h. c.) with respect to the 
body of the ear. Also a general end view of the sacculus (s.). It also shows 
the ampullar tube (a. t.) of the horizontal canal (h. ¢. ). 
Fic. 5. The membranous ear as seen from above. It shows the large 
curve made by the horizontal canal (h. ¢. ) and the shape of the ampulla (h. a. ) 
of the horizontal canal (h. c. ) together with the angle at which it enters the 
utriculus (u.) at the base of the anterior ampulla (a. a.). The darkened line 
from the horizontal and anterior ampulle represents the diagonal line of 
depression (**) which marks the separation of the utriculus (u.) and sac- 
culus (s.). This view also shows the angle between the posterior and an- 
terior canals (p.c.), (a. ¢.). 
Fic. 6. This is a drawing traced from a photograph of ear, eye and 
brain. It shows the angles made by the anterior and posterior canals with 
the axis of the head and with each other. Also the position of the ear as 
referred to the eye and brain. 
THE PACIFIC SALMON WITH NOTES ON THE 
HABITS OF THE YOUNG.* 
By TARLETON H. BEAN. 
The natural distribution of the salmon family covers all the 
principal divisions of the world, within arctic and temperate 
limits, except South America, and even in that continent man 
has attempted to supply what nature omitted. 
The river trout and sea trout of Great Britain have been ac- 
climatized in Tasmania and New Zealand, and the former has 
been successfully introduced into many waters of the United 
States. The rainbow trout of California is now thriving in 
many of the Eastern States, in which it has been planted, as 
well as in Mexico, Japan and Continental Europe. The quinnat 
* Read April 13, 1896, before the Biological Section of the New York Academy of 
Sciences. 
