56 EXTINCT, MONSTERS 
altogether safe to conclude that, because in so many ways they 
resembled king-crabs, they therefore had the same habit of 
burrowing into the soft muddy or sandy bed of the sea, as some 
authorities have supposed. Seeing that there is a difference of 
Fig. 7.—Silurian Merostomata. 
1. Stylonwrus. 2. Eurypterus. (After H. Woodward.) 
opinion on this subject, the author consulted Dr. H. Woodward 
on the question, who said he thought it unlikely, seeing that, in 
some of them, such as the Pterygotus, the eyes are placed on the 
margin of the head-shield; for it would hardly care to rub its 
eyes with sand. Whether it chose at times to bury its long body 
