Proc. R. I. Acad., Vol. XXVII., Sect. B. 



Plate XVII. 



Fi». 1. — The Port-hole in the Labviinth. 



Fig. 2. — Fractured Stalactite in the 

 Old Cave. 



Fig. 0. — Aiiemolite. Fig. 4. — Sections of Cave Pearls. 



Hir.I, liKODKICK, AND PiULE — MlTCHELSTO-\VX CaYES. 



