17 



3. communis. 



Turbo striatus, Adams. — Rissoa striata, 

 Brown, (2d edit.) — Cingula striata, Flem. 

 — Helix striata, Walker. — Pyramis stria- 

 tus, Brown. 

 Common on fuci. As there is a Rissoa striata 

 (Phil. Test, Sic.) very distinct from this species, I 

 have changed the name. 



4. interrupta. 



Rissoa interrupta, Brown, (2d edit.) — Turbo 



interruptus, J dams. — Cingula interrupta, 



Flem. — Pyramis interruptus, Brown. 



Under stones at low water : extremely abundant 



on the north side of the island, but rare at the south 



and east, where its place is occupied by the next 



species. 



5. cingilla. 



Rissoa cingilus, J/tc/z. — Turbo cingilus, J/owL 

 — Cingula cingilla, Flem. — Turbo vittatus, 

 Don. — Turbo graphicus, TurL — Pyramis 

 cingiilus. Brown. 

 Common under stones at low water. 



6. reticulata. 



Rissoa reticulata, Brown, (2d edit.) — Turbo 

 reticulatus, Mont. — Cingula reticulata, 

 Flem. — Pyramis reticulatus, Brown. 

 In deep water. Rare. 



7. cimex. 



Rissoa cimex, Brown, (2d edit.) — Turbo 

 cimex, Lin. — Cingula cimex, Flem. — Py- 



