244 APPENDIX. 
PLATE. VIII. 
MOLLUSCA. 
NassA RETICULATA. Pl. VIII. fig. 2, a, b,¢,d,e, f 
A VERY active Mollusc, given here chiefly ca 
account of the opportunity afforded by the birth of 
young fry in Mr. Lloyd’s tanks. The Wassa feeds on 
small animalcules, for which, in aquaria, it may be 
seen routing among the sand and stones, sometimes 
burying itself among them so as only to show its 
caudal tube moving along between them. A pair 
of Nassee in Mr. Lloyd’s collection, deposited, on the 
5th of April, about fifty capsules or bags of eggs 
upon the stems of weeds (fig. 2 6); each capsule con- 
tained about a hundred eggs. The capsules opened 
on the 16th of May, permitting the escape of roti- 
ferous fry (fig. 2, c, d, ¢), not in the slightest degree 
resembling the parent, but presenting minute nautilus- 
shaped transparent shells. These shells rather hang 
