^7.8 STROMBUS. SCREW-SHELL. Class VI. 



3. TURBO- Mont. Test. Br. Sup. 110. Sup. id. I70. t. 30. /. 7- 



FORMIS. 



* Str. shell of seven plain volutions, with about 

 eighteen transverse ribs ; aperture suborbicu- 

 lar ; apex obtuse ; minute. 



Mr. Montagu suggests, in his Appendix, that 

 it may prove a variety of the Strombus costatus. 



