302 THE ATLANTIC. [ cHAP. IV. 
(From a photograph.) 
Fig. 78.—Eutrance to the Convolvulus Cave, Walsingham, Bermudas. 
in the rock, often almost masked by vegetation. One, which 
we passed on our way, called the Convolvulus Cave, is covered 
with a glorious mantle of Zpomwa nil, its ephemeral flowers 
changing during the day from brilliant azure to rich purple. 
