PLATE XLVIII. 
PAQB 
Fibs, la, lb. SiPHONALiA makylaxdk a n. sp 186 
la. Dorsal view. St. Mary's River. 
lb. Ventral view of the same specimen. 
Pig. 2. SrPHONALIA ( ?) CALVEBTANA n. Sp 187 
2. Specimen from Plum Point. U. S. National Museum. 
Figs. 3a, 3b, 4. Pisa.^jia (Celatoconus) protractus (Conrad) 188 
3a. Dorsal view. Plum Point. 
3b. Ventral view of the same specimen. 
4. Tip of a specimen from the same locality. X 4 
Fig. 5. Ptychosalpinx axtilis (Conrad) 188 
5. Ventral view. St. Mary's River. 
Fig. 6. Ptychosalpinx multirugata Conrad 189 
6. Dorsal view. Plum Point. U. S. National Museum. 
Fig. 7. Ptychosalpinx lienosa Conrad 189 
7. Ventral view. Plum Point. 
Figs. 8, 9. Ilyanassa (?) (Paranassa) porcina (Say) 190 
8. Ventral view of type-specimen of Buccinum porcinuvi. St. Mary's 
River (?). British Museum. (After Say.) 
9. Ventral view of type-specimen of Buccinum aratuni. St. Mary's 
River (?). British Museum. (After Say.) 
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