. Natural history of the American Decapoda (Crustacea); Lobster fisheries. 330 BUI^LETIN OF THE BUREAU OF FISHERIES. organs of the schizopods, have given to this and the two succeeding larvae the name of the "schizopod" or "mysis ; 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
. Natural history of the American Decapoda (Crustacea); Lobster fisheries. 330 BUI^LETIN OF THE BUREAU OF FISHERIES. organs of the schizopods, have given to this and the two succeeding larvae the name of the "schizopod" or "mysis ; 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 h. Fig, 35.—Cephalothorax o( 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 (sohd) 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 Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Herrick, Francis Hobart, 1858-1940. Washington, Govt. Print. Off.
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