CLIMBING PLANTS. 405 
water must have become fresh by diffusion very slowly to 
allow of the gradual adaptation of the crustaceans to the 
change of element. Possibly the occurrence at the bottom 
of salt springs like those of the adjacent shores of Michigan 
may have had something to do with the slowness of the 
change. At present the bottom water, judging from a speci- 
men we obtained from a depth of fifty fathoms approxi- 
mately, is entirely fresh. 
I am informed by Professor Gill that the Triglopsis 
T'hompsonii of Girard is a marine rather than a fresh-water 
form. This fish inhabits the depths of the lakes, having 
been found by Professor Baird in the stomach of Lota ma- 
culosa, taken in Lake Ontario, and recently by Dr. Hoy in 
those of trout caught off Racine. 
Our Mysis is allied to certain arctic forms, which would 
lead us to refer its original entry into the lakes to the cold 
period of the quaternary epoch. While the marine species 
usually live near the surface of the water, this one appears 
to be confined to the bottom, a result of its seeking the 
colder and at a former period the more saline waters. 
The investigation of the materials obtained by the dredg- 
ing parties of the Academy is now in progress, and the re- 
sults will be published in full with illustrations at an early 
period. 
CLIMBING PLANTS. 
BY PROF. W. J. BEAL. 
following remarks upon this interesting subject, can 
scarcely be called a review, but more properly a summary 
given nearly in the words of the author.* It has been made 
*On the Movements and Habits of Climbing Plants. By Charles Darwin, E 
F.R.S., F.L.S., etc. [From the Journal of the Linnzan Society.] pp. 118. London, 1895. 
