316 TURBO. IFREATH-SHELL. Class VI. 



70. carina- Lin. Tr. viii. 186. 



TULUS. 



* T. with a tapering, opaque, white ridged 

 shell, of seven volutions ; aperture narrow and 

 marginated; minute. 

 Sandwich; rare. 



71. rivulus. Lin. Tr. viii. 186. 



* T. with a striated shell, of four volutions, 

 opaque and white ; aperture marginated and 

 oval ; minute ; inhabits fresh water. 



Near Feverskam ; very rare. 



72. sandvi- Lin. Tr. viii. 187* 



CENSIS. 



* T. with a white pellucid shell, three reticu- 

 lated volutions, and one toothed aperture ; mi- 

 nute.' 



73. margi- Mont. Test. Br. Sup. 128. 

 natds. 



* T. with a subcylindric white very strong 

 shell ; six or eight striated transversely ribbed 

 volutions ; aperture oval ; length three eighths 

 of an inch, breadth one fourth of its length. 



From Guernsey. 



