. St. Nicholas [serial]. air itis not so much a matter of flight as of large pectoral fins have not the action ofwings in propelling them forward, but of aparachute in sustaining them briefly in the airbefore they fall in a curve into the water again. crabs and fish. Wareham, St. Nicholas : Weare two cousins — Margaretand Mary. Margaret is ten,and I, Mary, am write to ask you a fewquestions about salt-waterfish. We would also like totell you a little about ouraquarium. We have someminnows, several hermit-crabs, two eels, and a greatmany snails. It is very in-
. St. Nicholas [serial]. air itis not so much a matter of flight as of large pectoral fins have not the action ofwings in propelling them forward, but of aparachute in sustaining them briefly in the airbefore they fall in a curve into the water again. crabs and fish. Wareham, St. Nicholas : Weare two cousins — Margaretand Mary. Margaret is ten,and I, Mary, am write to ask you a fewquestions about salt-waterfish. We would also like totell you a little about ouraquarium. We have someminnows, several hermit-crabs, two eels, and a greatmany snails. It is very in-teresting to watch a large crab wasfound clinging to the rudderof the rowboat. It was verydifficult to remove him, but The salt-water crabs are scavengers, andfeed upon various forms of dead animal are great fighters, but are also wily,often averting danger by resorting to are an interesting and curious group, asthey possess a good degree of intelligence andhave amusing THE COMMON BLUE CRAB. 1904.] NATURE AND SCIENCE FOR YOUNG FOLKS. 271 do schools of fish have leaders? Newport Beach, St. Nicholas : We were at the beach lastsummer and did quite a little fishing from the schools of fish were very thick around the wharf,especially the small fish such as sardines, smelt, andhorse-mackerel. There have also been schools ofyellowtail. I have been very interested to know if schools of fishhave any leaders, so I thought I would write and askyou about it. Your very interested reader, Margery In answer to this letter, President David StarrJordan, an eminent authority regarding thehabits of fish, writes to the editor of Natureand Science as follows: To your young correspondent from Newport, Cali-fornia, you can say that around these beaches the sar-
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