216 Journal of the Asiatic Society of Bengal. |N.S., XVIII, 
where three larvae, freed from their cysts and in different stages 
of growth, are seen in optical section. The digestive gland is 
another favourite location for these cysts, opalescent white 
spheres conspicuous in the dark green of the gland. In figure 
2 (A. and B.) are drawn two nuclei which I obtained by decal- 
cification of small orient pearls; there can be no question as to 
theiridentity with the spherical larvae found alive in the tissues. 
Neither Prof. Herdman nor I ever claimed that all cyst pearls 
have such nuclei; we recognized that other foreign bodies, 

MiG, 2-4, 
by decalcificatio 
shown. In A.some of the m 
} tinct 
yielded nucleus B; n 
spherical larva shown in D, (ef Fig. 1,A). 
Ne be factor and become pearl nuclei. We have also even 
ound a small nematode worm, coiled upon itself, forming 
notably grains of sand, occasionally function as the intrusive 

