THE CALLING CRAB 89 
ing for the return of the tide,’ because, when the creature 
is left on the dry shore, by the movement of its claws it 
seems to be appealing to the waves to come back again. 
The specific title of Gelasimus vocans (Linn.), and the trivial 
Fig. 4.—Gelasimus arcuatus, de Haan, a male specimen, and pleon of the male dctached. 
[De Haan.] 
name, the calling crab, refer to the like action. Of the 
customs of an American species the following account is 
given by Professors Verrill and 8. I. Smith :— 
‘On sandy beaches near high-water mark, especially 
where the sand is rather compact and somewhat sheltered, 
one of the ‘“ fiddler-crabs,” Gelasimus pugilator | Latreille ], 
