V O L U T A. 



91 



Linn, names. 



19 triplicata 



20 pusilla 



21 bidentata 



22 alba 



23 pellucida 



24 unidentata 



25 interstiiicta 



26 insculpfa 



27 plicata 

 ^8 ambi'mia 



Gw. Engl, names. Synonyms. Habitat. 



3-toothed D. 4, ^ 138. M. Suppl 



p.99. Guernsey. 



3^36 small oval F.t.65,f.U.4. C.2,t,43, 



/.446. U. 



double-toothed M.&//;/)/./j.l00,f.30,/.2. Britain. 



white Tr.MS/.61. M.p.225. 



pellucid W. M.5/46. M.L12,/.6. 



single^toothedL.r.8,p.l31. 



divided L. T 3, t. 13, f. 23-4. M. 



t.l'2,j:\0. 



M.Siippi.p.ng. 



M.t.9A,f.1.L.T.Q,p.\3\. 



engraved 



plaited 



doubtfyl 



M.SuppLt.2l,f.4.L.T.8, 

 p.\32. 



29 Porphyrea 3438 Porphyry G. t. 24, f. P. C. 2, t. 46, 



/. 485-6. E. M.t.361, 



f.4. W. Indies. 



30 erythrostoma orange-marbledL.?.727,/.14.G.f,24,_/!0. 



C. 2, ^ 45, /. 476-r. 

 £.M.^361,/.2. Amboyna. 



SI oliva 3439 olive L. t. 728,/. 15. G. t. 24, 



/. F. C.2,t.51,f.559. 

 E. M.t.362,f.5. 



32 cruenta orange ibroatedZ. ^. 720,/. 4, 5. G.L23, 



/Q. C.2, i.46,/.491-2. 

 E.M.t.368,f.2. 



38 annulata 3441 ringed 



N 2 



i.^717,/.l. C.2, ^ 51, 

 /.564. E.M.^363,/2. 



Isle of France. 



