444 
THE OCEAN WORLD. 
The great flappers of Hyalea stridentata are yellow, marked at the# 
base with a fine violet spot. Its shell, plain above, convex beneath) 
is cloven on the side. The superior part is longer than the infefl° r ’ 
and the transverse line which unites them is furnished with thre e 
Fig. 310. Cleodora lanceolata (Lesueur). 
Fig. 311. 
Cleodora compressa k&j 
and Souleyet). 
the 
teeth. This shell is yellow, and nearly translucent. When 
animal swims, two expansions of its mantle issue from the lateral °' e 
in the shell. ^ 
The genus Cleodora lanceolata is a delicate flI1 
graceful creature ; its body, of gelatinous app 1 
cal' 
the 
ance, has a distinct head, with its fins near 
neck, notched in the form of a heart (Fig- ; ’l l’ 
its posterior part is globulous, transparent,^ 11 
luminous even in the dark. The animal w jj 
inhabits it sometimes shines through the sh e 
like a light placed inside a lantern. 
shell is triangular, as in Cleodora cuspidal a (Fig. 312), thin, vitre° ’ 
spine at the base. 
rig. 3.12. 
Cleodora cnspidata 
(Bocc.). 
and fragile, terminating in a lon 6 
