1158 General Notes. [November, 
put in position. Of a series of forty towers built by the Cam- 
barus diogenes that observed on the banks of a ditch, not one 
could have been the result of accident, as suggested by Mr, Tarr, 
The towers that were found in the meadows, at a considerable 
distance from open water, were invariably broader at the base, 
and never so high as those described as found on the edge of 
flowing water. These open-meadow towers or chimneys, how- 
ever, were all found to be composed of pellets of clay so arranged 
as to render it highly improbable that their positions were fortui- 
tous. Indeed, in the majority of instances it would have been 
practicable to have rolled the little balls of clay to a considerable 
distance from the opening of the tunnel. 
Perhaps there is a bearing on the question of design in tower 
building in the fact that often half-grown or even smaller cray 
of this species build the most elaborate structures. Some of the 
finest examples, 7. e., the most slender and tallest were the work 
of diminutive little fellows which certainly could have avoided a 
deal of labor if the chimneys or towers were not designed. 
I have never seen a Cambarus diogenes in the act of a 
building, nor been able to determine why they tunneled at all. 
When this is determined I believe the towers will be found to 
have a close connection with the purposes of the subterranean 
haunts of the burrowing crayfish.— Chas. C. Abbott. 
THE CRUSTACEA OF THE TaLisMAN Expepition.—the Taks- 
man brought home a fine collection of Crustacea from all dept of 
Swimming crabs appear to be rare at great depths, yet p ene 
Bathynectes were found at from 450 to 950 meters off a 
and the Cape Verde isles. Anomoura were abundant a 
great depths and usually belonged to transition forms. 0! 
these have a very wide distribution, thus Homola wage 
viously thought to be exclusively Mediterranean, was pe vibed 
the Azores and Canaries, and a species of Dicranomia ppe 
by Milne-Edwards from the Antilles, was found at the eE 
Some Galatheas were taken from the interior of the qaer 
the genus Aphrocallistes. Galathodes antonu and ie, were 
Jormosus, a species with its abdomen twice coiled upon It era and 
dredged at 4¢00 meters. A considerable number of gen 
species of Eryonidea were taken. : 7 i 
A remarkable new shrimp is Nematocarcinus gracilipes, W 
wonderfully attenuated feet and antennæ. In Giyphus of the 
alis, another Caridean, the female has the lateral por recep- 
minal segments developed into a sort of pouch for 
tion of the eggs. F Day 
RACES AND HYBRIDS AMONG THE SALMONIDES DM dings 
publishes additional facts on this subject in the Proc e 
the Zoölogical Society of London for 1884, p. 17. ee pie 
observations, published in 1882, tended to show that te” 
