NATURAL HISTORY OF AMERICAN LOBSTER. 335 
cord, motor and sensory elements, as well as the complex stomato-gastric system, have 
essentially the same relations as are found in an adult animal. 
Natural food of the larva . — It is not to be doubted that the incessant activity of this 
larva, which apparently knows no rest day or night, is needed, as Mead remarks to 
bring them into contact with the minute suspended bodies upon which they feed. All 
the rearing experiments that have been conducted by Mead and others with any degree 
of success during the past 15 or 20 years, whether in Europe or the United States, have 
clearlv shown that the larvae must have their food suspended and in fine particles ; the 
