86 - LIVERPOOL BIOLOGICAL SOCIETY. — alt 
uni-valve shell, and use the curiously abortive hind limbs — 
to cling to the inside whorls. My friend Surgeon Major . 
Archer has seen crabs of the genus Dorippe protecting 
themselves (probably from the scorching tropical sun), at 
low tide, on the mud flats at Singapore, by carrying large 
leaves over their backs (Journal of Linn. Soc., vol. xx., 
p: 108). 
