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probably as severe as that between the surface forms. The number of 
eggs carried by one female taken June 3, 1902, was five; by another 
taken in July the same year was six, and by yet another very large speci- 
men taken in the same month the number was ten; measurement show- 
ed the eggs to be large, .54 m. m. A C. gracilis carrying eggs was exam- 
ined and the number found was twenty while the diameter was not much 
over half that of the eggs of C. mucronatus.^ The young of the one are 
produced where there is a goodly supply of food near at hand, and the 
other w'here considerable search may be necessary before any be found. 
The one has a limited supply in the egg, the other, (7. mucronatus, has a 
more abundant supply. Packard has noted the small number and large 
size of the eggs in the cave spider, Anthrohia, and Smith refers to the 
fact “large size and small number of the eggs is a very marked char- 
acteristic of many deep sea Decapoda.” 
From the statement quoted from Prof. Eigenmann and from the obser- 
vations recorded in this paper it seems we may conclude that vegetation 
eating animals may find sufficient food in subterranean waters for the 
sustenance of a limited number of individuals. In some waters however 
as in many wells, the amount of vegetable life* or of debris is very small; 
under such conditions the individual Crustacea whether feeding upon 
vegetable or animal tissues must be few. 
