actually decreased slightly in body length, but it 

 had become enormously broad. Also, it more nearly 

 resembled the adult, having now a somewhat flat- 

 tened forebody and an abdomen much shorter and 

 wider than that which obtained in the zoea stage. 

 The abdomen, however, was not, as in the case of 

 the adult, curled under the forebody, but stood out 

 straight behind. The eyes were still prominent, 

 though mounted on heavy stalks; and it was pos- 

 sessed of ten legs, the two foremost of which were 

 the stoutest and were armed with claws. In fine, 

 our little megalops was now so fashioned that it 

 could either swim or walk. 



Another week passed. Meanwhile, unlike the 

 zoca, no growth took place and no moltings marked 

 the development of the megalopean crab. Then, 

 just four weeks to a day after hatching, came a 

 transformation — came a change as complete as it 

 was sudden: Little Jim cast the last remnant of 

 larval clothing and stood forth on its own as a very 

 tiny but nevertheless a perfect spider-crab . . . 



Indeed, when I made my routine rounds of in- 

 spection on the morning following his final meta- 

 morphosis, I missed the little creature; I thought 

 at first that he was lost; but no, there he was, crawl- 



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