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Transactions.— Zoology. 
EXPLANATION OF PLATES XIII.—XVI. 
Prare XIII. 
Aplysia tryoni. Teeth. 
Calliopea felina. Radula. 
Murex octogonus. Teeth. a, operculum. 
Euthria vittata. Teeth. a, operculum. 
Cominella virgata. Teeth. a, operculum, 
Cominella maculata. Teeth. a, operculum, 
Cominella maculosa. Teeth. 
Cominella testudinea. Teeth. 
Polytropa haustrum. Teeth. a, operculum. 
Purpura textiliosa. Teeth. a, operculum. 
Trophon quoyi. Teeth. a, operculum, 
um. 
Polytropa albomarginata. “Teeth, à, operculum. 
Voluta pacifica. Teeth. 
Ancillaria australis. Teeth. a, operculum. 
Coriocella ophione. Teeth. 
Pirate XIV. 
Crypta costata. Teeth, 
Cerithidea bicarinata. Teeth and operculum. 
Cerithidea nigra. Teeth. 
Melanopsis trifasciata. Teeth and operculum. 
tooth 
Nerita atrata. Teeth. a, & marginal tooth. 
Euchelus bellus. Teeth and operculum. a, an outside marginal tooth. 
Anthora tuberculata. Teeth and operculum. 
Zizyphinus selectus. First meen n 
Gibbula oppressa. Teeth. 
Margarita inconspicua. Teeth. 
Cantharidus purpuratus, Central tooth. 
Calcar cookii. Teeth. 
Puare XV. 
Diloma ethiops. Teeth. 
Diloma nigerrima. Teeth. a, a marginal tooth. 
Diloma undulosa. Teeth. 
Diloma subrostrata. Teeth, 
