Dwellers of the sea and shore . dwellersofseasho00crow Year: 1935 A ''Lhing FossiF' 237 this molt it loses entirely its segmented appearance and now more nearly resembles the adult. A short spine- like tail adorns the abdomen; the abdomen is thin, and this region, like the cephalothorax, is hollowed out underneath, the whole forming an ample shield for the legs and gill feet. HORSESHOE CRAB MOLTING. When Limulus is a year old it attains to an inch in length; by then it has molted several times. But not before it is in its fourth year does it reach sexual ma- turity. In that event the male
Dwellers of the sea and shore . dwellersofseasho00crow Year: 1935 A ''Lhing FossiF' 237 this molt it loses entirely its segmented appearance and now more nearly resembles the adult. A short spine- like tail adorns the abdomen; the abdomen is thin, and this region, like the cephalothorax, is hollowed out underneath, the whole forming an ample shield for the legs and gill feet. HORSESHOE CRAB MOLTING. When Limulus is a year old it attains to an inch in length; by then it has molted several times. But not before it is in its fourth year does it reach sexual ma- turity. In that event the male acquires the strong front claws that distinguish his sex. Thus, in following the development of Limulus, we see revealed with remarkable distinctness its ancient origin. It is not always so easy, however, to trace the
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