40 
ZOOLOGY. 
4) 
In CHARGE OF WILLIAM STRATFORD. 
. THE SEA LiFe oF THE PaciFic SALMON, (with specimens of 
young). 
The young Oncorhynchus return annually with the 
adults to the mouths of rivers, and do not remain at sea 
until sexually mature, as usually stated. 
. Livinc Suip Worm (Teredo navalis). A bivalve mollusc 
which destroys ships, wharves, &c., by boring tunnels in 
wood. 
. Livinc TusBE Worms (Cistenides Gouldii) and others. Tube 
building worms. 
. FisHes new to this locality. Larimus and Elagatis, the runner. 
Numbers 1-4, exhibited by Tarleton H. Bean, New 
York Aquarium. 
. Larva stage of the Earthworm (Allolabophora feetida). 
Exhibited by N. R. Harrington, Zodlogical Department, 
Columbia University. 
. Eccs or THALASSERNA (A marine worm). Showing recent 
discoveries in Cytology. 
I. The Origin of the Centrosome of the second polar spin- 
dle from that of the first. 
II. The Origin of the Centrosome of the second cleavage 
spindle from that of the first. 
Exhibited by Bradley B. Griffin, Zodlogical Depart- 
ment, Columbia University. 
. Nuclear Changes in Noctiluca (a Protozoan). 
Exhibited by G. N. Calkins, Zodlogical Department, 
Columbia University. 
. Studies in the Excretory System of Leeches. 
I. An Excretory Cell with its intra-cellular musculature. 
II. An Excretory funnel, showing structure of cells and cilia. 
