66 FISH CULTURAL ASSOCIATION. 
ee ee ee ee ee a 
ness at first, then of a desire to keep their noses out into theairand 
to jump out of the tank, after which théy became exhausted and be- 
gan to die in half an hour after immersion in it. This trial did 
not prove that salmon of six months old could not have lived 
in sea-water provided the change had not been sudden. In a 
state of nature there are no such sudden changes, and young fish 
making their first voyage from the upper waters of a river to the 
ocean may consume several months in the journey, dropping 
down gradually and hardly noticing the increasing density from 
day to day to which they have become accustomed. 
The list of fishes which live in either salt or fresh water as 
given by the late Prof. Milner is as follows: 
Gataion:. (2). Pest he SY Nod) DO er BPRS Salmo salar 
Scat rower ei KR) Te... Bolu: JR RE BR eel S. zmmaculatus 
Brook-isout. wad: sfeiio: . minh eet Qaheeih S. fontinalts 
Mimatensht« 5.4 bagereesisepte 
ss ee we wee wae 
Aad. $e Coregonus sp. 
ST a [ee Oe ee eee ey ES er rs yee Osmerus mordax 
Four-spined-stickleback..«).........6 4: Pe eR Apeltes guadracus 
American Sole,,or hog Choker... Cats eons Achirus lineatus 
BEML COM Ay ae cle wree-c ange, ess Sole ie See ....Microgadus tomcodus 
SWetped bass, Ol TOCKISIT A oo). fc... aie anaenee ode Roccus lineatus 
PRUE GCM Nr. ime ee os Se pa ones Morone americana 
miiver gar, Or nish A oY. Me Bee Te. Belone longtrostr¢s 
Sita bs PSE OMNES BEI IR SER! sae Alosa sapidisstma 
Plowile wt (neds. sosfols salem pata Pomolobus pseudoharengus 
Satlor (shath) xc: sdelertd tie did dé Bag ok tele ale P. medtocris 
Hickory shad, or toothed herring...... .. Dorosoma cepedianum 
RS es ORR, oe Sen MN Oe SS ey Anguilla bostontensts 
NAT D-TMOSCO SUBETCON <3: 2. oat So Actpenser oxyrhynchus 
Siete HOsed SIMLOCOM. .! 5. \s vi asuie cee eee ce A. brevirostris 
TSMRUVEN RR ee se aes as” s Se eee Ree ee Petromyzon americanus 
Of these nineteen fishes Prof. Milner says: “Eight of the 
fishes named are believed to enter the rivers solely for the pur- 
pose of spawning.” The genus Pomolobus has been divided by 
Prof. Goode, since Mr. Milner wrote, into two species, it would 
therefore add another. 
