330 
BULLETIN OF THE BUREAU OF FISHERIES. 
organs of the sehizopods, have given to this and the two succeeding larvae the name 
of the “schizopod” or “mysis stage.” Functional appendages are wanting only in the 
abdominal segments, where, however, very small buds of the adult swimmerets can be 
seen beneath the cuticle in the second, third, fourth, and fifth abdominal somites. 
The cuticle of the larval lobster is now as translucent as glass, and such organs as 
the heart and blood vessels, the alimentary tract, and the rudimentary gills are seen with 
/ 
CL 
Fig. 35. — Cephalothorax of lobster in first stage when under stimulus of pressure, drawn immediately 
after reddening, through expansion of chromatophores. a, b, lateral and dorsal red chromatophore 
groups; yellow pigment not here shown. 
Fig. 36. — Cephalothorax of the same individual 10 minutes after release from pressure, and after paling 
from contraction of chromatophores. Both the red (solid) and yellow (dotted) pigment cells are 
indicated. 
great clearness. The green food yolk has disappeared entirely or is reduced to a mere 
remnant now more yellow than green, in the masticatory stomach. Perhaps the most 
conspicuous internal organ is the yellowish-brown “liver,” or gastric glands, the form of 
which on either side of the body resembles a cluster of grapes. 
