Zoological Society bulletin . these same lakes. As to the possibility of recent distribution tothe eastward from the Delaware River system, itwould seem that this may have been facilitatedby means of the Raritan Canal. In this casetheir appearnace in Central Park Lake wouldhave necessitated the species distributing itselfacross the brackish waters of New York Bay orthe lower Hudson River, and to get to ProspectPark Lake the East River would also have tobe crossed. No crayfishes are found in saltwater, however, and this fact would seem to beopposed to such a distribution. Experimentshave been m
Zoological Society bulletin . these same lakes. As to the possibility of recent distribution tothe eastward from the Delaware River system, itwould seem that this may have been facilitatedby means of the Raritan Canal. In this casetheir appearnace in Central Park Lake wouldhave necessitated the species distributing itselfacross the brackish waters of New York Bay orthe lower Hudson River, and to get to ProspectPark Lake the East River would also have tobe crossed. No crayfishes are found in saltwater, however, and this fact would seem to beopposed to such a distribution. Experimentshave been made at the New York Aquarium totest the resistance of this species to the harborwater, and it has been found that in brackishwater having a specific gravity of degreesthey will live for many days. If investigationshould prove that the species has distributeditself commonly in eastern New Jersey, thehypothesis that they have gained access to thepark lakes through the brackish water of the ZOOLOGICAL SOCIETY BULLETIN. 925. «S3
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectzoology, bookyear1901
