. Natural history of the American Decapoda (Crustacea); Lobster fisheries. 270 BULLETIN OF THE BUREAU OF FISHERIES. ; It is to be further noted that as early as the third larval stage and for some time thereafter the claw-tip, like the tooth, gives passage to the duct of a gland (d. t. g., fig. 19-20). I have not found glands of this type in the spines of the adult claw, and if present in older adolescent lobsters they are successfully concealed by the opacity of the shell. The adult spines were sectioned, but in all the young stages glycerine preparations were relied u
. Natural history of the American Decapoda (Crustacea); Lobster fisheries. 270 BULLETIN OF THE BUREAU OF FISHERIES. ; It is to be further noted that as early as the third larval stage and for some time thereafter the claw-tip, like the tooth, gives passage to the duct of a gland (d. t. g., fig. 19-20). I have not found glands of this type in the spines of the adult claw, and if present in older adolescent lobsters they are successfully concealed by the opacity of the shell. The adult spines were sectioned, but in all the young stages glycerine preparations were relied upon. A single tooth sometimes bears the ducts of three inde- pendent glands, in which case it is probably compound, resulting from the fusion of a corresponding number of teeth. Rarely a bifurcated duct is seen (fig. 2 pi. xlii), each. 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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